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Title: Body composition of lactating and dry Holstein cows estimated by deuterium dilution

Abstract

In three experiments patterns of water turnover and body composition estimated by deuterium oxide were studied in Holstein cows. In the first experiment, four lactating cows were infused with deuterium oxide, and blood samples were taken during 4-d collection. Milking was stopped; cows were reinfused with deuterium oxide and resampled. Slopes of deuterium oxide dilution curves indicated lactating cows turned water over more rapidly than nonlactating cows. In the second experiment with the same four cows, during 4-d collection, deuterium oxide concentrations in milk, urine, and feces showed dilution patterns similar to deuterium oxide in blood. Sampling milk may be an alternative to sampling blood. In the third experiment, 36 Holstein cows were fed 55, 65, or 75% alfalfa, smooth bromegrass, or equal parts of each forage as total mixed rations; remaining portions of rations were a grain mixture. Body composition was estimated at -1, 1, 2, 3, 4, and 5 mo postpartum. Empty body water, protein, mineral, fat, and fat percentage decreased from prepartum to postpartum. First calf heifers contained less empty body water, protein, and mineral than older cows. Cows fed diets with 55% forage had more body fat than those fed diets with 75% forage. Cows fedmore » alfalfa-based diets had more gastrointestinal fill regardless of grain than cows fed diets that contained alfalfa and smooth bromegrass. Gastrointestinal fill of cows increased from prepartum to 5 mo postpartum.« less

Authors:
;
Publication Date:
Research Org.:
Univ. of Minnesota, St. Paul
OSTI Identifier:
5623500
Resource Type:
Journal Article
Journal Name:
J. Dairy Sci.; (United States)
Additional Journal Information:
Journal Volume: 1
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; CATTLE; BODY COMPOSITION; BLOOD; DEUTERIUM; DIET; FECES; ISOTOPE DILUTION; LACTATION; MILK; URINE; WATER; ANIMALS; BIOLOGICAL MATERIALS; BIOLOGICAL WASTES; BODY FLUIDS; DOMESTIC ANIMALS; FOOD; HYDROGEN COMPOUNDS; HYDROGEN ISOTOPES; ISOTOPE APPLICATIONS; ISOTOPES; LIGHT NUCLEI; MAMMALS; MATERIALS; NUCLEI; ODD-ODD NUCLEI; OXYGEN COMPOUNDS; RUMINANTS; STABLE ISOTOPES; TRACER TECHNIQUES; VERTEBRATES; WASTES; 550201* - Biochemistry- Tracer Techniques

Citation Formats

Martin, R A, and Ehle, F R. Body composition of lactating and dry Holstein cows estimated by deuterium dilution. United States: N. p., 1986. Web. doi:10.3168/jds.S0022-0302(86)80373-3.
Martin, R A, & Ehle, F R. Body composition of lactating and dry Holstein cows estimated by deuterium dilution. United States. https://doi.org/10.3168/jds.S0022-0302(86)80373-3
Martin, R A, and Ehle, F R. 1986. "Body composition of lactating and dry Holstein cows estimated by deuterium dilution". United States. https://doi.org/10.3168/jds.S0022-0302(86)80373-3.
@article{osti_5623500,
title = {Body composition of lactating and dry Holstein cows estimated by deuterium dilution},
author = {Martin, R A and Ehle, F R},
abstractNote = {In three experiments patterns of water turnover and body composition estimated by deuterium oxide were studied in Holstein cows. In the first experiment, four lactating cows were infused with deuterium oxide, and blood samples were taken during 4-d collection. Milking was stopped; cows were reinfused with deuterium oxide and resampled. Slopes of deuterium oxide dilution curves indicated lactating cows turned water over more rapidly than nonlactating cows. In the second experiment with the same four cows, during 4-d collection, deuterium oxide concentrations in milk, urine, and feces showed dilution patterns similar to deuterium oxide in blood. Sampling milk may be an alternative to sampling blood. In the third experiment, 36 Holstein cows were fed 55, 65, or 75% alfalfa, smooth bromegrass, or equal parts of each forage as total mixed rations; remaining portions of rations were a grain mixture. Body composition was estimated at -1, 1, 2, 3, 4, and 5 mo postpartum. Empty body water, protein, mineral, fat, and fat percentage decreased from prepartum to postpartum. First calf heifers contained less empty body water, protein, and mineral than older cows. Cows fed diets with 55% forage had more body fat than those fed diets with 75% forage. Cows fed alfalfa-based diets had more gastrointestinal fill regardless of grain than cows fed diets that contained alfalfa and smooth bromegrass. Gastrointestinal fill of cows increased from prepartum to 5 mo postpartum.},
doi = {10.3168/jds.S0022-0302(86)80373-3},
url = {https://www.osti.gov/biblio/5623500}, journal = {J. Dairy Sci.; (United States)},
number = ,
volume = 1,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1986},
month = {Wed Jan 01 00:00:00 EST 1986}
}