Relationship of Dietary Crude Protein to Composition of Uterine Secretions and Blood in High-Producing Postpartum Dairy Cows
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TLDR
The crude protein content of the diet altered concentrations in blood of ammonia and concentrations in plasma of urea, phosphorus, potassium, and zinc, and the effects of dietary crude proteins on constituents of plasma and uterine secretions were examined at various stages of the estrous cycle of high producing Holstein cows.About:
This article is published in Journal of Dairy Science.The article was published on 1983-09-01 and is currently open access. It has received 167 citations till now. The article focuses on the topics: Estrous cycle & Blood plasma.read more
Citations
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Journal ArticleDOI
Review: effect of protein nutrition on ovarian and uterine physiology in dairy cattle.
TL;DR: Bovine endometrial cells in culture respond directly to increasing urea concentrations with alteration in pH gradient but respond most notably with increased secretion of prostaglandin F2 alpha (PGF2 alpha), thus providing a plausible link between elevated plasma urea nitrogen concentrations and decreased fertility.
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A statistical evaluation of animal and nutritional factors influencing concentrations of milk urea nitrogen
TL;DR: Blood urea N, body weight, yield of fat-corrected milk, dietary CP content, excess N intake, dry matter intake, and days in milk were positively related to milk ureaN, and parity, milk and fat yield, dietaryCP per unit of NEL content, and NEL intake were negatively related to Milk Urea N.
Journal ArticleDOI
Plasma and milk urea nitrogen in relation to pregnancy rate in lactating dairy cattle.
W.R. Butler,J J Calaman,S W Beam +2 more
TL;DR: Based on this study, plasma and milk will yield similar results for monitoring urea nitrogen in dairy cows; PUN and MUN concentrations > 19 mg/dL were associated with approximately a 20 percentage point decrease in pregnancy rate after AI in lactating dairy cattle.
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Using Milk Urea Nitrogen to Predict Nitrogen Excretion and Utilization Efficiency in Lactating Dairy Cows
TL;DR: Developing and evaluating a mathematical model that integrates milk urea N to predict excretion, intake, and utilization efficiency of N in lactating dairy cows revealed that a majority of the unexplained model error was associated with variation among cows.
Journal ArticleDOI
Reduction of fertility and alteration of uterine pH in heifers fed excess ruminally degradable protein.
C.C. Elrod,W.R. Butler +1 more
TL;DR: The causes underlying the reduction of fertility associated with feeding of excess ruminally degradable protein to cattle were elucidated and plasma NH4 was variable and did not differ between treatments or days of the estrous cycle.
References
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Journal Article
Protein Measurement with the Folin Phenol Reagent
TL;DR: Procedures are described for measuring protein in solution or after precipitation with acids or other agents, and for the determination of as little as 0.2 gamma of protein.
Journal ArticleDOI
Modified Reagents for Determination of Urea and Ammonia
TL;DR: Combinations of reagents are described for the catalyzed indophenol reaction for the determination of ammonia, which produces a stable blue color, and the procedure is adapted to thedetermination of urea after hydrolysis with urease.
Journal ArticleDOI
Fat in lactation rations: review.
D.L. Palmquist,T.C. Jenkins +1 more
TL;DR: Current research and practice demonstrate that 3 to 5% fat may be added to diets for lactation to increase energy intake of high-producing cows and/or to reduce starch feeding, thereby increasing the ratio of forage to concentrate to prevent depression of milk fat.
Journal ArticleDOI
Nitrogen requirement and utilization in dairy cattle.
L.D. Satter,R.E. Roffler +1 more
TL;DR: Formulation of dairy cow rations should consider the following points regarding nitrogen utilization by lactating cows: a scheme based upon metabolizable protein (absorbable protein) for calculating requirements and comparing protein sources is superior to crude or digestible protein designations.
Related Papers (5)
Reduction of fertility and alteration of uterine pH in heifers fed excess ruminally degradable protein.
C.C. Elrod,W.R. Butler +1 more
Plasma and milk urea nitrogen in relation to pregnancy rate in lactating dairy cattle.
W.R. Butler,J J Calaman,S W Beam +2 more