Early Lactation Responses of Dairy Cows Administered Bovine Somatotropin and Fed Diets High in Energy and Protein

M. J. Lormore, L. D. Muller, D. R. Deaver, Lester C. Griel, Jr.

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Early lactation dairy cows (n = 36) were used in a 2 × 2 factorial arrangement of treatments to evaluate responses to rbST when cows were fed a control diet or one simultaneously elevated in dietary energy (fat) and CP (primarily rumen undegradable) between 25 and 150 d postpartum. Supplemental dietary fat and undegradable intake protein had no effect on milk yield with or without rbST. Cows fed the higher density diet returned to a positive energy balance approximately 3 wk earlier than those fed the control diet when both received rbST. Change in BW was unaffected by treatments. Body condition scores at the end of the treatment period and reproductive performance were lower in cows administered rbST. Somatotropin significantly increased 3.5% FCM and milk fat yield and tended to increase milk fat percentage when combined with the high nutrient density diet. However, the high density diet significantly depressed both yield and percentage milk protein, which likely was related to the added fat. Intakes of DM, energy, and protein were not altered by rbST or the feeding of a high density diet. Somatotropin, but not diet, significantly improved all measures of efficiency. Feeding more nutrient dense diets to rbST-treated cows in negative energy balance did not affect adipose tissue responsiveness to β-adrenergic agonist. The current NRC nutrient recommendations for high producing cows appear adequate for cows administered rbST.

Original languageEnglish (US)
Pages (from-to)3237-3247
Number of pages11
JournalJournal of dairy science
Volume73
Issue number11
DOIs
StatePublished - Jan 1 1990

Fingerprint

high energy diet
high protein diet
cattle feeds
early lactation
Lactation
somatotropin
dairy cows
Diet
cows
diet
Proteins
Milk
Dietary Fats
Fats
protein intake
Food
energy balance
Growth Hormone
adrenergic agonists
milk protein percentage

All Science Journal Classification (ASJC) codes

  • Food Science
  • Animal Science and Zoology
  • Genetics

Cite this

Lormore, M. J. ; Muller, L. D. ; Deaver, D. R. ; Griel, Jr., Lester C. / Early Lactation Responses of Dairy Cows Administered Bovine Somatotropin and Fed Diets High in Energy and Protein. In: Journal of dairy science. 1990 ; Vol. 73, No. 11. pp. 3237-3247.
@article{c5a30cf2a7d044cd8dd1d59a873766ce,
title = "Early Lactation Responses of Dairy Cows Administered Bovine Somatotropin and Fed Diets High in Energy and Protein",
abstract = "Early lactation dairy cows (n = 36) were used in a 2 × 2 factorial arrangement of treatments to evaluate responses to rbST when cows were fed a control diet or one simultaneously elevated in dietary energy (fat) and CP (primarily rumen undegradable) between 25 and 150 d postpartum. Supplemental dietary fat and undegradable intake protein had no effect on milk yield with or without rbST. Cows fed the higher density diet returned to a positive energy balance approximately 3 wk earlier than those fed the control diet when both received rbST. Change in BW was unaffected by treatments. Body condition scores at the end of the treatment period and reproductive performance were lower in cows administered rbST. Somatotropin significantly increased 3.5{\%} FCM and milk fat yield and tended to increase milk fat percentage when combined with the high nutrient density diet. However, the high density diet significantly depressed both yield and percentage milk protein, which likely was related to the added fat. Intakes of DM, energy, and protein were not altered by rbST or the feeding of a high density diet. Somatotropin, but not diet, significantly improved all measures of efficiency. Feeding more nutrient dense diets to rbST-treated cows in negative energy balance did not affect adipose tissue responsiveness to β-adrenergic agonist. The current NRC nutrient recommendations for high producing cows appear adequate for cows administered rbST.",
author = "Lormore, {M. J.} and Muller, {L. D.} and Deaver, {D. R.} and {Griel, Jr.}, {Lester C.}",
year = "1990",
month = "1",
day = "1",
doi = "10.3168/jds.S0022-0302(90)79016-9",
language = "English (US)",
volume = "73",
pages = "3237--3247",
journal = "Journal of Dairy Science",
issn = "0022-0302",
publisher = "Elsevier Limited",
number = "11",

}

Early Lactation Responses of Dairy Cows Administered Bovine Somatotropin and Fed Diets High in Energy and Protein. / Lormore, M. J.; Muller, L. D.; Deaver, D. R.; Griel, Jr., Lester C.

In: Journal of dairy science, Vol. 73, No. 11, 01.01.1990, p. 3237-3247.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Early Lactation Responses of Dairy Cows Administered Bovine Somatotropin and Fed Diets High in Energy and Protein

AU - Lormore, M. J.

AU - Muller, L. D.

AU - Deaver, D. R.

AU - Griel, Jr., Lester C.

PY - 1990/1/1

Y1 - 1990/1/1

N2 - Early lactation dairy cows (n = 36) were used in a 2 × 2 factorial arrangement of treatments to evaluate responses to rbST when cows were fed a control diet or one simultaneously elevated in dietary energy (fat) and CP (primarily rumen undegradable) between 25 and 150 d postpartum. Supplemental dietary fat and undegradable intake protein had no effect on milk yield with or without rbST. Cows fed the higher density diet returned to a positive energy balance approximately 3 wk earlier than those fed the control diet when both received rbST. Change in BW was unaffected by treatments. Body condition scores at the end of the treatment period and reproductive performance were lower in cows administered rbST. Somatotropin significantly increased 3.5% FCM and milk fat yield and tended to increase milk fat percentage when combined with the high nutrient density diet. However, the high density diet significantly depressed both yield and percentage milk protein, which likely was related to the added fat. Intakes of DM, energy, and protein were not altered by rbST or the feeding of a high density diet. Somatotropin, but not diet, significantly improved all measures of efficiency. Feeding more nutrient dense diets to rbST-treated cows in negative energy balance did not affect adipose tissue responsiveness to β-adrenergic agonist. The current NRC nutrient recommendations for high producing cows appear adequate for cows administered rbST.

AB - Early lactation dairy cows (n = 36) were used in a 2 × 2 factorial arrangement of treatments to evaluate responses to rbST when cows were fed a control diet or one simultaneously elevated in dietary energy (fat) and CP (primarily rumen undegradable) between 25 and 150 d postpartum. Supplemental dietary fat and undegradable intake protein had no effect on milk yield with or without rbST. Cows fed the higher density diet returned to a positive energy balance approximately 3 wk earlier than those fed the control diet when both received rbST. Change in BW was unaffected by treatments. Body condition scores at the end of the treatment period and reproductive performance were lower in cows administered rbST. Somatotropin significantly increased 3.5% FCM and milk fat yield and tended to increase milk fat percentage when combined with the high nutrient density diet. However, the high density diet significantly depressed both yield and percentage milk protein, which likely was related to the added fat. Intakes of DM, energy, and protein were not altered by rbST or the feeding of a high density diet. Somatotropin, but not diet, significantly improved all measures of efficiency. Feeding more nutrient dense diets to rbST-treated cows in negative energy balance did not affect adipose tissue responsiveness to β-adrenergic agonist. The current NRC nutrient recommendations for high producing cows appear adequate for cows administered rbST.

UR - http://www.scopus.com/inward/record.url?scp=0043199067&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0043199067&partnerID=8YFLogxK

U2 - 10.3168/jds.S0022-0302(90)79016-9

DO - 10.3168/jds.S0022-0302(90)79016-9

M3 - Article

AN - SCOPUS:0043199067

VL - 73

SP - 3237

EP - 3247

JO - Journal of Dairy Science

JF - Journal of Dairy Science

SN - 0022-0302

IS - 11

ER -