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Van Amburgh, Mike
Associate Professor
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- Associate Professor, Animal Science (AN SC), College of Agriculture and Life Sciences (CALS)
My program is devoted to discovery and problem solving contemporary issues in nutrition, physiology and management in the dairy and livestock industries and disseminating new knowledge to students and the industry.
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Research
research overview
- Research efforts in my laboratory are multifaceted but focused on several aspects of productive efficiency of dairy cattle. With increasing pressure on the dairy industry to reduce the environmental impact of cattle, we are currently working on developing a basic understanding of whole animal nitrogen metabolism and efficiency of use of absorbed amino acids. We have embarked on several studies employing stable isotopes of nitrogen compounds to understand urea nitrogen recycling and the ultimate distribution and partitioning of intake nitrogen on a systems basis. This work is leading to new dietary strategies that allow nutritionists to reduce the amount of nitrogen (crude protein) fed to lactating cows while maintaining milk production thus improving the efficiency of use of absorbed feed nitrogen and reducing the amount of manure nitrogen excreted into the environment per unit of milk produced. Data from studies like these are being used further develop the Cornell Net Carbohydrate and Protein System (CNCPS). My group is furthering this work with new studies examining the role of carbohydrate digestion and site of digestion on the partitioning of those substrates to milk. This has direct effects on the overall efficiency of the animal and how absorbed amino acids are utilized. We are embarking on studies that allow us to further describe the efficiency of use of absorbed amino acids with the goal of further enhancing the efficiency of use of protein by the lactating dairy cow. In support of the CNCPS, we are also developing new tools to describe how NDF digestion occurs in various feeds. Our focus is primarily forages and our goal is to better describe the rate and extent of NDF digestion for use in the model with the objective of linking this to dry matter intake and whole farm forage allocation to reduce the importation of non-farm raised feeds, thus reducing the importation of nutrients such as phosphorous and nitrogen. Finally, the lab has a 16 year history of engaging in research to enhance our understanding of the nutrient requirements and management of calves and heifers. Previous work identified time and not nutrient intake as the primary factor influencing pre-pubertal mammary development as measured by DNA. This has significant implications for years of research into this very perplexing and controversial issue and allows us to redirect of efforts on factors that can be manipulated and have a larger impact on future milk potential. To that point, recent work has demonstrated that early life nutrient intake and growth rates prior to weaning have an epigenetic or developmental effect on the calf that results in greater milk yield over the life of the animal as an adult. Further, in collaboration a some colleagues, we were able to demonstrate that pre-weaning growth rates accounted for up to 25% of the variation in first lactation milk production. This is a significant finding and one that provides us with a new direction and with profound implications for early life management of calves and heifers.
research activities
- Cornell Dairy Fellows Program graduates agricultural professionals
- Early life nutrition and management and long-term productivity of dairy calves
- Raising fiscally responsible heifers (Winter Dairy Management - 2008)
- Whole-farm nutrient management: a capstone course preparing on environmental management of dairy farms
area(s) of concentration/expertise
keywords
- Cornell Net Carbohydrate and Protein System
- calves
- efficiency
- heifers
- lactation
- nitrogen
- nutrition
- rumen function and fiber digestibility
submitted impact statement
Publications
individual publications
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academic article
- Case Study: Application and evaluation of the Cornell Net Carbohydrate and Protein System as a tool to improve nitrogen utilization in commercial dairy herds . Professional Animal Scientist. 28:370-378. 2012
- Development and evaluation of equations in the Cornell Net Carbohydrate and Protein System to predict nitrogen excretion in lactating dairy cows. Journal of Dairy Science. 95:2004-2014. 2012
- Effect of nutritional plane on health and performance in dairy calves after experimental infection with Cryptosporidium parvum. Journal American Veterinary Medical Association. 241:1514-1520. 2012
- Pre-weaning milk replacer intake and effects on long-term productivity of dairy calves. Journal of Dairy Science. 95:783-793. 2012
- The effect of nutrient intake from milk or milk replacer of pre-weaned dairy calves on lactation milk yield as adults: a meta-analysis of current data. Journal of Animal Science. 2012
- A mathematical approach to predict the size and rate of digestion of a fast and slow pool and the indigestible NDF. Journal of Dairy Science. 94:455. 2011
- Effect of cow variation on the efficiency of nitrogen recycling to the rumen in dairy cattle. Journal of Dairy Science. 94:122. 2011
- Effects of pre-weaning nutrient intake in the developing mammary parenchymal tissue and fat pad. Journal of Dairy Science. 94:73. 2011
- Nitrogen balances for New York State: Implications for manure and fertilizer management. Soil Science Society of America Journal. 66:1-17. 2011
- Technical Note: Improved methodology for analyses of acid detergent fiber and acid detergent lignin. . Journal of Dairy Science. 94:3613-3617. 2011
- Anionic salts in the prepartum diet and addition of sodium bicarbonate to colostrum replacer, and their effects on immunoglobulin G absorption in the neonate. Journal of Dairy Science. 93:2067-2075. 2010
- Effects of increased milking frequency on metabolism and mammary cell proliferation in Holstein dairy cows. Journal of Dairy Science. 93:565-573. 2010
- Nitrogen recycling and rumen degradable protein requirements: Quantitative updates to describe microbial requirements, sources and applications in ration formulation. Journal of Dairy Science. 93:467. 2010
- The effect of insulin glargine on the metabolism of lactating Holstein cows. Journal of Dairy Science. 93:869. 2010
- The effects of feeding medium chain triglycerides on the growth, insulin responsiveness and body composition of Holstein calves from birth to 85 kg bodyweight. Journal of Dairy Science. 93:4262-4273. 2010
- Assessing the ability of the Cornell Net Carbohydrate and Protein System to predict fecal and urinary nitrogen excretion in lactating dairy cows. Journal of Dairy Science. 92:479. 2009
- Assessing the ability of the Cornell Net Carbohydrate and Protein System to predict fecal and urinary nitrogen excretion in lactating dairy cows. Journal of Dairy Science. 92:479. 2009
- Effects of lignin linkages with other plant cell wall components on in vitro and in vivo NDF digestibility of forages. Journal of Dairy Science. 92:588. 2009
- Cornell Net Carbohydrate and Protein System: A model for precision feeding of dairy cattle. Animal Feed Science and Technology. 143:174-202. 2008
- Effect of beta-mannanase enzyme mixture addition to soy-containing milk replacers on growth and health of neonatal calves. Journal of Dairy Science. 91:69. 2008
- Measures of acid detergent lignin recovery and evaluations of the 2.4 time lignin factor for estimating indigestible NDF. Journal of Dairy Science. 91:57. 2008
- Regulation of mammary parenchymal growth by the fat pad in prepubertal dairy heifers: role of inflammation-related proteins. Journal of Endocrinology. 196:539-546. 2008
- The effects of increased milking frequency during early lactation on metabolism and mammary cell proliferation in Holstein cows. Journal of Dairy Science. 91:450. 2008
- Updates to the Cornell Net Carbohydrate and Protein System: Effects of changes in feed digestion rates and passage rate assignments on metabolizable energy and protein predictions. Journal of Dairy Science. 91:265. 2008
- Effect of estrogen on leptin and expression of leptin receptor transcripts in prepubertal dairy heifers. Journal of Dairy Science. 90:3742-3750. 2007
- Effect of nutrition on the growth hormone responsiveness of liver and adipose tissue in dairy cows. Journal of Endocrinology. 195:49-58. 2007
- Influence of dietary fat and protein on body composition of Jersey bull calves. Journal of Dairy Science. 90:5600-5609. 2007
- Letter to the Editor: The effects of force-feeding sick dairy calves: A comment on Quigley et al. (2006). Journal of Dairy Science. 90:3567-3568. 2007
- Ontogenic and nutritional regulation of steroid receptor and IGF-I transcript abundance in the prepubertal heifer mammary gland. Journal of Endocrinology. 195:59-66. 2007
- Regulation of gene expression in the bovine mammary gland by ovarian steroids. Journal of Dairy Science. 90 Supplement 1. 2007
- Developmental and Nutritional Regulation of the Prepubertal Heifer Mammary Gland: I Parenchyma and fat pad mass and composition . Journal of Dairy Science. 89:4298-97. 2006
- Effects of body weight and nutrition on mammary protein expression profiles in Holstein heifers . Journal of Dairy Science. 89:4276-4288. 2006
- Estrogen-dependent responses of the mammary fat pad in prepubertal dairy heifers. Journal of Endocrinology. 190:819-827. 2006
- Identification of estrogen-responsive genes in the parenchyma and fat pad of the bovine mammary gland by microarray analysis. Physiological Genomics. 27:42-53. 2006
- Whole Farm Nutrient Management: Capstone course on environmental management of dairy farms. Journal of Natural Resources and Life Sciences Education. 35:12-23. 2006
- Fecal prevalence and diversity of Salmonella species in lactating dairy cows in four states. Journal of Dairy Science. 88:3603-3608. 2005
- Partition of Nitrogen Excretion in Urine and the Feces of Holstein Replacement Heifers. Journal of Dairy Science. 88:1778-1784. 2005
- Effect of nitrogen intake on nitrogen recycling and urea transporter abundance in lambs. Journal of Animal Science. 82:1157-64. 2004
- Measures of Bone Mineral Content in Mature Dairy Cows. Journal of Dairy Science. 87:3816-3825. 2004
- The Cornell Net Carbohydrate and Protein System for evaluating herd nutrition and nutrient excretion. Animal Feed Science and Technology. 112:29-78. 2004
- Composition and Functional Capacity of Blood Mononuclear Leukocyte Populations from Neonatal Calves on Standard and Intensified Milk Replacer Diets. Journal of Dairy Science. 86:3592-3604. 2003
- Demonstration of a role for insulin in the regulation of leptin in lactating dairy cows. Journal of Dairy Science. 86:3508-3515. 2003
- Effect of feeding supplemental fibrolytic enzymes or soluble sugars with malic acid on milk production. Journal of Dairy Science. 86:576-585. 2003
- Modeling growth of cattle for application within the structure of the Cornell Net Carbohydrate and Protein System. Advances in Experimental Medicine and Biology. 537:267-285. 2003
- Nitrogen metabolism and recycling in Holstein heifers. Journal of Animal Science. 81:545-552. 2003
- Nutritional and developmental regulation of plasma leptin in dairy cattle. Journal of Dairy Science. 86:3206-3214. 2003
- The Net Carbohydrate and Protein System model for evaluating herd nutrition and nutrient excretion. Animal Feed Science and Technology. 112:29-78. 2003
- The effect of immunization with jackbean urease on antibody response and nitrogen recycling in mature sheep. Livestock Production Science. 81:283-292. 2003
- Effect of nutrient intake on the development of the somatotropic axis and its responsiveness to GH in Holstein bull calves. Journal of Animal Science. 80:1528-1537. 2002
- Modulation of the development of the somatotropic axis in Holstein bull calves by level of nutrient intake. Journal of Animal Science. 80:1528-1537. 2002
- Composition of growth of Holstein calves fed milk replacer from birth to 105 kilogram body weight. Journal of Dairy Science. 84:830-842. 2001
- Decreased concentration of plasma leptin in periparturient dairy cows is caused by negative energy balance. Journal of Endocrinology. 171:339-348. 2001
- Effect of varying carbohydrate and fat levels on body composition of milk replacer-fed calves. Journal of Animal Science. 79:2260-2267. 2001
- Use of Chromium mordanted neutral detergent residue as a predictor of fecal output to estimate intake in grazing high producing Holstein cows. Animal Feed Science and Technology. 89:155-164. 2001
- Development of a specific RIA to measure physiological changes of circulating leptin in cattle and sheep. Journal of Endocrinology. 166:519-528. 2000
- Predicting requirements for growth, maturity and body reserves in dairy cattle. Journal of Dairy Science. 82:1968-1977. 1999
- Dietary fatty acid sources affect conjugated linoleic acid concentrations in milk from lactating dairy cows. Journal of Nutrition. 128:881-885. 1998
- Effect of intake of pasture on concentrations of conjugated linoleic acid in milk of lactating cows. Journal of Dairy Science. 81:1630-1636. 1998
- Effects of three prepubertal body growth rates on performance of Holstein heifers during first lactation. Journal of Dairy Science. 81:527-538. 1998
- Evaluation of National Research Council and Cornell Net Carbohydrate and Protein Systems for predicting requirements of Holstein heifers. Journal of Dairy Science. 81:509-526. 1998
- The role of pH in regulating ruminal methane and ammonia. production. Journal of Animal Science. 76:2190-2196. 1998
- Management and economics of extended calving intervals with use of bovine somatotropin. Livestock Production Science. 50:15. 1997
- Alterations of pH in response to increased dietary protein in cattle are unique to the uterus. Journal of Animal Science. 71:702-706. 1993
- Growth response of Holstein heifers fed two different protein sources. Journal of Dairy Science. 75:270. 1992
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article
- Nitrogen balances for the New York State: Implications for manure and fertilizer management 2011
- Nitrogen balances for the New York Upper Susquehanna River Watershed: Implications for manure and fertilizer management 2010
- Lower ration crude protein has many benefits 2009
- Are your rations environmentally friendly? 2008
- CNCPS gets an update 2008
- Understanding nitrogen use in dairy cattle 2006
- Ammonia emissions: the next regulatory battleground 2002
- Sweeten up dairy rations 2002
- Research feature – accelerated calf growth 1999
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conference paper
- An Evaluation of Using ByProduct Feeds in Lactating Cow Diets on Greenhouse Gas Emissions Using CNCPS v6.1. Proc. Cornell Nutr. Conf.. 130-145. 2012
- Early life nutrition and management and long-term productivity of calves.. Minnesota Nutr. Conf.. 2012
- Management of calves and heifers that makes economic sense. Vermont Dairy Producers Conference. 2012
- Ten key herd management opportunities on dairy farms.. 2012 Feed Dealer Seminars Proceedings. 68-70. 2012
- Feeding low crude protein rations to dairy cows - opportunities and challenges. Lakeshore Technical College. 8. 2011
- Feeding low crude protein rations to dairy cows - Challenges and opportunities. Dept. of Animal Science, Cornell University. 8. 2010
- Updates to the Cornell Net Carbohydrate and Protein System v6.1 and implications for ration formulation.. Cornell Nutrition Conference. 144-159. 2010
- Using models to optimize the efficiency of nitrogen and amino acid use in lactating cows. Proceedings, California Animal Nutrition Conference. 2010
- Feeding low crude protein rations to dairy cows - opportunities and challenges. Cornell Nutrition Conference. 235-241. 2009
- The Cornell Net Carbohydrate and Protein System: Current and Future Approaches for Balancing of Amino Acids. Proceedings, Cornell Nutrition Conference for Feed Manufacturers. 28-37. 2009
- aNDF, NDFd, iNDF, ADL and lignin: What have we learned?. Cornell Nutrition Conference. 81-97. 2009
- A Perspective on the Environmental Impact of the Dairy Industry – Issues and Progress. Proceedings of Northeast Dairy Producer Conference. 2008
- Early life management and long-term productivity of dairy calves. Proceedings of the Cornell Nutrition Conference. 2008
- Effect of Early Life Nutrient Intake on Long-Term Productivity of Calves. Proceedings of Southwest Nutrition Conference. 2008
- Rumensin and milk fat production. Proceedings of the Cornell Nutrition Conference. 99-112. 2008
- Achieving better nitrogen efficiency in lactating dairy cattle: Updating field usable tools to improve nitrogen efficiency. Proceedings, Cornell Nutrition Conference for Feed Manufacturers. 25-37. 2007
- Improving the efficiency of use of nitrogen in lactating dairy cattle: Revisiting the CNCPS approach. Cornell Nutrition Conference. 2007
- Ontogenic expression of microRNA in bovine mammary gland. ADSA/ASAS/PS Meetings. 2007
- A mammary gland biologist’s perspective on functional genomics. 8th World Congress on Genetics Applied to Livestock Production. 2006
- Advancements and future challenges in understanding mammary gland function. ASAS/ADSA Joint Meeting. 2006
- Developing progressive nutrition and management programs for calf and heifer growers. Professional Dairy Heifer Growers Association Annual Meeting. 2006
- Effect of ovarian status and estrogen on leptin and leptin receptor expression in prepubertal dairy heifers. 88th Annual Meeting of the Endocrine Society. 2006
- Nitrogen efficiency in lactating dairy cattle. Proc. Cornell Nutrition Conf.. 205-218. 2006
- Regulation of gene expression in the bovine mammary gland by ovarian steroids. ASAS/ADSA Joint Meeting. 2006
- Regulation of hepatic leptin receptor expression in periparturient dairy cows. ASAS/ADSA Joint Meeting. 2006
- Designing heifer systems that work on your farm. Proceedings of the Western Canadian Dairy Seminar, University of Alberta. 207-214. 2005
- Effect of ovariectomy and estradiol administration on bovine skeletal muscle insulin-like growth factor I (IGF-I) and -adrenergic receptor (-AR) messenger RNA (mRNA) abundance. ASAS/ADSA Joint Meeting. 2005
- Nutrient requirements of the calf: Birth to weaning. Natural Resource, Agriculture and Engineering Service (NRAES) Publication 175, Cooperative Extension, Ithaca, NY. 86-95. 2005
- Protein requirements of lactating dairy cattle: A case-study approach. Proceedings, Cornell Nutrition Conference for Feed Manufacturers. 213-221. 2005
- Protein requirements of lactating dairy cattle: A case study approach. Animal Science Mimeograph Series. 17-25. 2005
- Target growth and nutrient requirements of post-weaned dairy heifers. Natural Resource, Agriculture and Engineering Service (NRAES) Publication 175, Cooperative Extension, Ithaca, NY. 128-138. 2005
- The dynamics of fat digestion in lactating cows: What does the literature tell us? . Cornell Nutr. Conf.. 2005
- The dynamics of fat digestion in lactating dairy cows: what does the literature tell us?. Cornell Nutrition Conference. 83-94. 2005
- Validation of the 2.4 times lignin factor for ultimate extent of NDF digestion, and curve peeling rate of fermentation curves into pools. Cornell Nutrition Conference. 139-149. 2005
- Corn Silage: Rates, Extents and Integration. Cornell Nutrition Conference. 1-9. 2004
- Current perspectives on the nutrient requirements of preweaned calves. Easter School, University of Nottingham. 2004
- Developmental and nutritional regulation of steroid receptor mRNA expression and epithelial cell proliferation in the prepubertal bovine mammary gland. J. Anim. Sci. 82(1):240. 2004
- How much nitrogen can a cow recycle?. Cornell Nutrition Conference. 179-188. 2004
- Integrating calf and heifer requirements with herd management and target growth. Mid-South Nutrition Conference. 2004
- Intensive feeding, target growth lactation milk yield and economics of heifers. 8th National Dairy Calf and Heifer Conference. 2004
- Reduced age at first calving: Effects on lifetime production, longevity, and profitability. 3rd Annual Arizona Dairy Producers Conference. 41-55. 2004
- Reduced age at first calving: Effects on lifetime production, longevity, and profitability. Kansas Dairy Producers Conference. 41-55. 2004
- Corn silage neutral detergent fiber: refining a mathematical approach for in vitro rate of digestion. Proc. Cornell Nutrition Conf. 99-108. 2003
- Effect of feeding conjugated linoleic acid and other fatty acids during the prepubertal period on the composition of growth and lactation yield of Holstein heifers. Proc. Cornell Nutr. Conf. 159-173. 2002
- Effect of dietary protein intake on nitrogen metabolism of Holstein heifers. Proc. Cornell Nutr. Conf. 198-208. 2001
- Nutrient Management on Dairy farms - Development and application of the Cornell University Nutrient Management Planning System – a Case Study. Red Deer, Alberta, Canada. 283-294. 2001
- Requirements for and Regulation of Growth of Holstein Calves. Renaissance Nutrition Conference. 2001
- Requirements for and Regulation of Growth of Holstein Calves. Proceedings Ruminant Health Conference. 1-13. 2001
- Requirements for and Regulation of Growth of Holstein Calves. Proceedings Winter Dairy Management Meetings. 2001
- Requirements for and Regulation of Growth of Holstein Calves. Proceedings Virginia State Feed Manufacturers Annual Meeting. 2001
- Requirements for and Regulation of Growth of Holstein Calves – Implications for Decreasing Age at First Calving. Proceedings Tri-State Nutrition Conference. 113-132. 2001
- Requirements for growth of Holstein calves and evaluation of current feeding systems. Proceedings of Cornell Nutrition Conference. 46-55. 2001
- The Advantages of “Accelerated Growth” in Heifer Rearing. Proceedings of the Western Canadian Dairy Seminar. 2001
- Effect of varying carbohydrate and fat content of the diet on body composition of milk fed calves. Proceedings of Cornell Nutrition Conference. 239-250. 2000
- Regulation of metabolism and nutrient partitioning in high-yielding dairy cows. 51st Annual Meeting of the European Association for Animal Production. 122. 2000
- The problem of declining rate of cell wall degradation with time. Proceedings of Cornell Nutrition Conference. 150-166. 2000
- What is leptin and what role might it pay in ruminant metabolism?. Cornell Nutrition Conference. 72-80. 2000
- What is leptin and what role might it play in ruminant metabolism? . Proceedings of Cornell Nutrition Conference. 72-80. 2000
- Accelerated heifer growth: Nutrient requirements and effects on lactation and profitability. Proceedings of the Maryland Nutrition Conference for Feed Manufacturers. 1998
- Accelerated heifer growth: Nutrient requirements and effects on lactation and profitability. Proceedings of the Southwest Nutrition & Management Conference. 1998
- Nutrient requirements and management of the milk fed calf. Proceedings of Cornell Nutrition Conference. 130-141. 1998
- Ontogeny of the somatotropic axis in milk-fed bull calves between birth and 105 kg. Proceedings of Cornell Nutrition Conference. 119-129. 1998
- The Cornell Net Carbohydrate and Protein System: a model to predict cattle nutrient requirements under widely varying conditions. Society of Comparative Nutrition Annual Meeting. 1998
- The Cornell Net Carbohydrate and Protein System: a model to predict cattle nutrient requirements under widely varying conditions. Conference on Interdisciplinary Modeling. 1998
- Effect of ionophores on growth and lactation in cattle . Proceedings of Cornell Nutrition Conference. 1997
- Extended calving intervals with the use of bST. Proc. Western Dairy Mgmt. Conf.. 115-121. 1997
- Extended calving intervals with the use of bST. Proceedings of Mid-Atlantic Dairy Conference, Thriving in a Global Economy. 95-101. 1997
- Extended calving intervals with use of bST. Proceedings Western Dairy Management Conference. 1997
- Use of the Cornell Net Carbohydrate and Protein System for developing rations for optimum growth of Holstein heifers. Proceedings Western Section ARPAS Continuing Education Seminar. 1997
- Economics of extended calving intervals with use of bST. Proc. 1996 NE Dairy Producers Conf.. 82-92. 1996
- Management and Economics of Extended Calving Interval Using bST. Proceedings of the Northeast Dairy Producers Conference. 1996
- Nutrition and age at first calving. Renaissance Nutrition Conference. 1996
- Profitability of accelerated heifer growth. Northeast Dairy Producers Conference. 1996
- Heifer growth and development. 95th Penn Annual Conference. 1995
- Optimizing heifer growth - Calving at 21 months. North East Ohio Ag Expo ’95. 1995
- Accelerated growth of Holstein heifers - Effects on lactation. Proceedings Cornell Nutrition Conference. 147-154. 1994
- Accelerated growth of holstein heifers -Effects on lactation. Cornell Nutrition Conference. 1994
- Growth and Nutrition of Heifers. Proceedings Dairy Management Conference. 39-65. 1994
- Current perspectives of heifer housing. Second Biennial Northeast Heifer Management Symposium. 37. 1993
- Growth and nutrition of heifers from weaning to breeding weight. Second Biennial Northeast Heifer Management Symposium. 59. 1993
- Meeting amino acid requirements of growing cattle with the Cornell Net Carbohydrate and Protein System. Proceedings of Cornell Nutrition Conference. 44-55. 1993
- Predicting the most profitable heifer feeding program. Proceedings 1993 Winter Dairy Management Schools. Animal Science Mimeo Series. 1993
- Dairy replacements - Third class citizens on many dairy farms? Should an increased management priority be given to them?. Proceedings 1992 Winter Dairy Management Schools. Animal Science Mimeo Series. 41-66. 1992
- Heifer management that works in New York. Dairy Congress 1992. Animal Science Mimeo Series. 17-42. 1992
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conference poster
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document part
- A comparison of methods to evaluate in vitro intestinal digestibility 2010
- Development of a mathematical model to obtain rate of digestion and prediction of indigestible NDF and dry matter intake from NDF, IVNDFD and ADL 2010
- Early life nutritional management and effects on long term productivity of dairy calves. 331. 2010
- Effect of lignin linkages with other plant cell wall components on in vitro and in vivo NDF digestibility of forages and potential energy yield. 723. 2010
- Effects of birth weight and dietary caloric density on growth, voluntary intake and body composition of newborn lambs. 215. 2010
- Evaluation of farm performance indicators of three New York dairies as predictors for farm nutrient balances over time 2010
- Expression of specific genes regulating mammary growth in pre-pubertal Holstein heifers 2010
- Nitrogen balances for New York State: implications for manure and fertilizer management 2010
- Nitrogen recycling and rumen degradable protein requirements: Quantitative updates to describe microbial requirements, sources, and applications in ration formulation 2010
- Performance of calves fed an all-milk or enzymatically modified plant protein containing milk replacer with and without a specific amino acid profile 2010
- Sources of variation and importance of the quantification of the in-vitro NDF digestibility for estimating rates of NDF digestion 2010
- The effect of abomasal infusion of histidine and proline on milk composition and amino acid utilization in high producing lactating dairy cows 2010
- The effect of insulin glargine on the metabolism of lactating Holstein cows.. 869. 2010
- Imprinting effects of lactational performance from dam to calf during gestation. 274. 2009
- Nitrogen balances for New York state; past and future 2009
- Whole farm performance indicators; tools for goal-setting and performance tracking on New York dairy farms 2009
- Effect of beta-mannanase enzyme mixture addition to soy-containing milk replacers on growth and health of neonatal calves 2008
- Effects of dietary starch and unsaturated fat with Rumensin on milk fat depression in lactating dairy cattle 2008
- Measures of acid detergent lignin recovery and evaluations of the 2.4 time lignin factor for estimating indigestible NDF 2008
- Effect of feeding corn silage based diets deficient in either predicted ruminal nitrogen or metabolizable protein on nitrogen utilization and efficiency. 345. 2007
- Effect of lignin type, acid detergent lignin or Klason lignin, on rate and extent of NDF digestion. 564. 2007
- Estimating NDF rate of digestion: a comparison of different approaches for use in a first order model application. 565. 2007
- Ontogenic expression of microRNA in bovine mammary gland. 414. 2007
- Ruminal and intestinal protein and amino acid digestibility of feather meal with blood products. 100. 2007
- A comparison of the true protein assays using three precipitating agents and filter pore sizes. 362. 2006
- Advancements and future challenges in understanding mammary gland function. 409. 2006
- Regulation of gene expression in the bovine mammary gland by ovarian steroids. 426. 2006
- Regulation of hepatic leptin receptor expression in periparturient dairy cows. 288. 2006
- A proteomic approach to evaluate the effects of body weight and plane of nutrition on protein expression profiles of mammary gland extracts from Holstein heifers. 365. 2005
- Amino acid content of residues from in vitro and S. griseus incubations. 316. 2005
- An evaluation of the calf and heifer models within the 2001 Dairy NRC publication. 253. 2005
- Effect of feeding medium chain triglycerides on calf growth, insulin responsiveness and body composition. 56. 2005
- Effect of ovariectomy and estradiol administration on bovine muscle insulin-like growth factor-I (IGF-I) and β-adrenergic receptor (βAR) messenger RNA (mRNA) abundance. 283. 2005
- Effects of body weight and plane of nutrition on histological development of mammary tissue in Holstein heifers. 288. 2005
- Use of an immortalized bovine mammary epithelial cell line (MAC-T) to measure the mitogenic activity of extracts from heifer mammary tissue: effects of nutrition and body weight. 288. 2005
- Components of growth in Holstein heifers reared from early life on two levels of energy intake. 210. 2004
- Developmental and nutritional regulation of steroid receptor mRNA expression and epithelial cell proliferation in the prepubertal bovine mammary gland. 240. 2004
- Effects of energy intake and time to puberty on mammary growth of prepubertal Holstein heifers. 275. 2004
- It’s more than manure! A Whole Farm Nutrient Management Course at Cornell 2004
- Influence of ratio of dietary fat to protein on body composition of Jersey bull calves. 136. 2003
- Amino acid composition of ruminant feeds and feed fractions. 217. 2003
- Changes in plasma leptin from birth to puberty in dairy cattle. 308. 2003
- Effect of feeding fatty acids to prepubertal heifers on first lactation milk production. 22. 2003
- Effects of feed management program and Posilac on prepubertal growth rate of replacement dairy heifers. 308. 2003
- Effects of prepubertal growth rate and Posilac treatment of replacement dairy heifers on subsequent milk production and economics. 307. 2003
- Nutritional modulation of hepatic growth hormone responsiveness in late-lactating dairy cows. Changes in plasma leptin from birth to puberty in dairy cattle. 297. 2003
- Regional expression of IGF-I and estrogen receptor-alpha within prepubertal bovine mammary parenchyma and fat pad. Changes in plasma leptin from birth to puberty in dairy cattle. 301. 2003
- Analysis of the spatial, hormonal and developmental regulation of the estrogen receptor α gene in cattle. 338. 2002
- Comparison between measurement of parenchylmal development of heifer mammary glands by computed tomography and traditional dissection techniques. 337. 2002
- Effect of feeding a calcium salt of conjugated linoleic acid (CLA) prior to puberty on body composition and mammary development in Holstein heifers. 338. 2002
- Effect of nitrogen intake nitrogen recycling and urea transporter expression in lambs. 245. 2002
- Effect of nitrogen intake on total nitrogen excretion and its partition between urine and feces in Holstein heifers. 237. 2002
- Growth and subsequent productivity of dairy replacements. 79. 2002
- Role of insulin and growth hormone in regulating the concentration of plasma leptin in lactating dairy cows. 195-196. 2002
- The effect of feeding three milk replacers regimens on calf intake, body weight gain and animal performance. 67. 2002
- Composition and regulation of targeted growth of the neonate: implications for feeding systems and postweaning management 2001
- Effect of Jackbean urease immunization on nitrogen recycling in mature sheep 2001
- Effect of different levels of dietary protein on nitrogen metabolism of heifers 2001
- Effects of dietary conjugated linoleic acid (CLA) on the composition and function of peripheral blood mononuclear leukocyte populations in heifer calves 2001
- Effects of dietary energy and protein on the immunological performance of milk replacer-fed Holstein bull calves. 135. 2000
- Nutritional regulation of circulating leptin in growing lambs is influenced by sex. 18-19. 2000
- Regulation of leptin mRNA and plasma leptin during fetal life and the transition from pregnancy to lactation in ruminants. 178. 2000
- Responses to repeated bST challenges around weaning in Holstein heifer and bull calves. 144. 2000
- The somatotropic axis of young calves can be modulated by nutrition and bST. 143. 2000
- Metabolic responses to short-term bST administration in milk-fed bull calves between birth and 100 days of age. 157. 1999
- Net energy and protein requirements for pre-ruminant Holstein calves from birth to 105 kg bodyweight. 92. 1999
- Accelerated heifer growth: lactation and economic outcomes 1998
- Predicting requirements for growth, maturity and body reserves in dairy cattle 1998
- Determination of soluble fiber fractions in ruminant feeds 1997
- Effect of dietary fatty acid sources on conjugated linoleic acid (CLA) levels in milk from lactating dairy cows. 243. 1997
- Management and economics of extended calving intervals with use of bST 1996
- Effect of pre-pubertal growth rate in Holstein heifers on first lactation milk yield. 185. 1994
- Growth response of Holstein heifers fed two different protein sources. 270. 1992
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report
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software
Teaching
teaching overview
- My teaching focus is undergraduate programs in nutrition, physiology and dairy management. I work closely with the Cornell Dairy Fellows Program and advise a large number of undergraduate students. I believe in integrating our understanding of the biological principles of dairy cattle metabolism with application to management and profitability of dairy cattle and farms.
teaching activities
- ANSC-3511: Junior Dairy Fellows - Spring 2013
- ANSC-4120: Whole-Farm Nutrient Management - Spring 2013
- ANSC-4560: Dairy Management Fellowship - Spring 2013
- ANSC-7900: Graduate-Level Thesis Research - Spring 2013
- ANSC-8900: Master's Level Thesis Research - Spring 2013
- ANSC-9900: Doctoral-Level Thesis Research - Spring 2013
- AGSCI-4960: Internship in Agricultural Sciences - Fall 2012
- ANSC-4110: Integrated Cattle Nutrition - Fall 2012
- ANSC-4510: Dairy Herd Business Management - Fall 2012
- ANSC-4511: Quantitative Decision Making on Dairy Farms - Fall 2012
- ANSC-7900: Graduate-Level Thesis Research - Fall 2012
- ANSC-8900: Master's Level Thesis Research - Fall 2012
- ANSC-9900: Doctoral-Level Thesis Research - Fall 2012
- ANSC-3511: Junior Dairy Fellows - Spring 2012
- ANSC-4120: Whole-Farm Nutrient Management - Spring 2012
- ANSC-4560: Dairy Management Fellowship - Spring 2012
- ANSC-4940: Special Topics in Animal Science - Spring 2012
- ANSC-7900: Graduate-Level Thesis Research - Spring 2012
- ANSC-8900: Master's Level Thesis Research - Spring 2012
- ANSC-9900: Doctoral-Level Thesis Research - Spring 2012
- AGSCI-4960: Internship in Agricultural Sciences - Fall 2011
- ANSC-3511: Junior Dairy Fellows - Fall 2011
- ANSC-4110: Integrated Cattle Nutrition - Fall 2011
- ANSC-4511: Quantitative Decision Making on Dairy Farms - Fall 2011
- ANSC-7900: Graduate-Level Thesis Research - Fall 2011
- ANSC-8900: Master's-Level Thesis Research - Fall 2011
- ANSC-9900: Doctoral-Level Thesis Research - Fall 2011
Service
outreach overview
- I do not have an official extension appointment, but because of the focus of my research and teaching program, I am asked to participate in extension and educational programs around the state and around the world. My extension activities are related to the Pro-Dairy program and other extension programs in the state. I do not have a formal extension program but am involved in developing activities like Winter Dairy Management meetings when the topic requires my expertise. I do extension meetings around the state if time allows and the topic is pertinent to my research and teaching. This impacts mostly producers and feed industry professionals in the state. My outreach activities are a function of my research program. Due to my involvement with the Cornell Net Carbohydrate and Protein System and CPM Dairy, I spend a significant amount of time training and communicating with the dairy and livestock industry – including producers, feed chemists, nutritionists and academics, about how to apply and interpret the model. This takes place on a state, national and international basis. For example, I spoke at the National Forage Testing Association meeting about chemical analyses required for better prediction of cattle requirements and the variation associated with many of these assays. This impacts anyone that sends a sample into one of those labs, since we guide the procedures. In addition, my research work in several areas of ruminant growth, development, nutrition and physiology has some basis in application and results in my being asked to various conferences in the U.S. and elsewhere.
service to the profession
- NC 1042 Regional Committee, ADSA Committee Member 2008 -
- North American Intercollegiate Dairy Challenge Board Board of Directors 2003 -
- Feed Analyses Consortium, University of New Hampshire Member 2003 -
- American Dairy Science Association Chairperson 2009 - 2012
- CPM Dairy nutrition Committee Member 2005 - 2012
- American Dairy Science Association Officer, President/Elect/Past 2008 - 2009
- Northeast Branch American Dairy Science Association Officer, President/Elect/Past 2008 - 2009
- American Dairy Science Association Officer, President/Elect/Past 2008
- American Dairy Science Association Officer, Vice President 2007 - 2008
- American Dairy Science Association/American Society for Animal Science Officer, Vice President 2007
- American Dairy Science Association- American Society of Animal Science - Northeast Region Officer, Treasurer 2006 - 2007
- Foundation Scholar Award Committee, ADSA Committee Member 2004 - 2007
- NC-1119 Regional Committee, ADSA Committee Member 2003 - 2007
- American Dairy Science Association/American Society for Animal Science Officer, Secretary 2006
- Alfred State College Farm Task Force Member 2005
- AI-SPER-0203DF692AB00010925 Chairperson 2004 - 2005
- Growth and Development Committee, ADSA Committee Member 2001 - 2005
- Alfred State College Agriculture Curriculum Evaluation Committee Chairperson 2004
- Growth and Development Committee, ADSA Chairperson - 2004
- NC-1119 Regional Committee, ADSA Committee Member 2001 - 2002
- Graduate Student Paper Competition Committee Chairperson 1998 - 2001
- R. M. Hoyt Scholarship Selection Committee Committee Member 1998 - 2001
reviewer or editor for
- ADSA Lactation Committee/Symposium Chair
- Bard Grants
- Danish Council for Independent Research, Technology and Production Sciences
- Hatch Grants, College of Agriculture and Life Sciences, Cornell University
- Journal of Dairy Science
- National Institutes of Health Grants Program
- USDA National Research Initiative Grants
Background
education and training
- Ph.D. in Animal Science, Cornell University 1996
- B.S. in, The Ohio State University 1984
awards and honors
- 2012: Donald C. Burgett Distinguished Advisor Award, 2012
- American Feed Industry Association Award for Dairy Nutrition Research, 2010
- Land O’Lakes Purina Feed LLC Teaching Award for Dairy Production, 2010
- Professor of Merit: For Outstanding Teaching and Advising, 2008
- Team Extension Award - Cornell Net Carbohydrate and Protein System Team, 2007
- Foundation Scholar Award for Outstanding Research and Teaching, 2004
- Young Scientist Award, NE Section, 2002
- Outstanding Student Affiliate Advisor Award, 1998
Other
college
- CALS
research keyword
- Cornell Net Carbohydrate and Protein System
- calves
- efficiency
- heifers
- lactation
- nitrogen
- nutrition
- rumen function and fiber digestibility
name prefix
- Dr.