L
L.T. Chapin
Researcher at Michigan State University
Publications - 52
Citations - 2236
L.T. Chapin is an academic researcher from Michigan State University. The author has contributed to research in topics: Prolactin & Melatonin. The author has an hindex of 22, co-authored 52 publications receiving 2171 citations. Previous affiliations of L.T. Chapin include Upjohn & McGill University.
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Journal ArticleDOI
Association between energy balance and luteal function in lactating dairy cows.
TL;DR: In lactating cows, secretion of progesterone is reduced by spontaneous caloric deficit and is modulated by timing and magnitude of maximal caloric deficit, which is a potential source of infertility in lactating dairy cows.
Journal ArticleDOI
Effect of Increasing Energy and Protein Intake on Body Growth and Carcass Composition of Heifer Calves
E.G. Brown,Michael J. VandeHaar,K.M. Daniels,J.S. Liesman,L.T. Chapin,Duane H. Keisler,M.S. Weber Nielsen +6 more
TL;DR: Increasing energy and protein intake from 2 to 8 wk and 8 to 14 wk of age increased BW, withers height, and gain:feed ratio, and Plasma IGF-I concentrations were greatest for calves fed the H diet during either period.
Journal ArticleDOI
Effect of intensified feeding of heifer calves on growth, pubertal age, calving age, milk yield, and economics.
L.E. Davis Rincker,Michael J. VandeHaar,Christopher A. Wolf,J.S. Liesman,L.T. Chapin,M.S. Weber Nielsen +5 more
TL;DR: Intensified feeding of calves can be used to decrease age at first calving without negatively affecting milk yield or economics, and removing genetic variation in milk using parent average values as a covariate resulted in a tendency for greater milk from heifers fed the intensive diet.
Journal ArticleDOI
Effect of increasing energy and protein intake on mammary development in heifer calves.
E.G. Brown,Michael J. VandeHaar,K.M. Daniels,J.S. Liesman,L.T. Chapin,J.W. Forrest,R.M. Akers,R.E. Pearson,M.S. Weber Nielsen +8 more
TL;DR: Higher energy and protein intake from 2 to 8 wk of age increased parenchymal mass and paren chymal DNA and RNA in mammary glands of heifer calves without increasing deposition of parenChymal fat.
Journal ArticleDOI
Effects of diet and injection of bovine somatotropin on prepubertal growth and first-lactation milk yields of Holstein cows.
R.P. Radcliff,Michael J. VandeHaar,L.T. Chapin,T. E. Pilbeam,D.K. Beede,E.P. Stanisiewski,H.A. Tucker +6 more
TL;DR: Injection of bST during the prepubertal growth period combined with the high diet decreased age at first parturition without reducing milk production, but did not affect reproduction.