Effect of forage-concentrate ratio in complete feeds fed ad libitum on energy intake in relation to requirements by dairy cows.
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Cows in the latter stages of lactation did not appear to regulate their intake according to physiological requirements for milk production, and cows in the groups fed higher concentrate feeds achieved energy balance earlier.About:
This article is published in Journal of Dairy Science.The article was published on 1974-11-01 and is currently open access. It has received 73 citations till now. The article focuses on the topics: Energy balance.read more
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Journal ArticleDOI
Whole-tract digestibility and nitrogen-use efficiency of partial mixed rations with and without canola meal
TL;DR: In this paper, the authors investigated the effect of extra crude protein intake on nitrogen-use efficiency and the fate of the additional dietary nitrogen (N) in spring-calved rumen fistulated cows.
DissertationDOI
Metabolic responses of dairy cows with fatty liver to treatment with glucagon
TL;DR: In this article, the effects of glucagon on early-lactation dairy cows that have fatty livers and are susceptible to ketosis were studied, where glucagon was continuously infused via intravenous jugular catheters into dairy cattle in various physiological states.
References
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Prediction of the energy value of cow's milk.
H.F. Tyrrell,J. T. Reid +1 more
TL;DR: This equation predicted the milk energy output of cows producing low-fat milk effected by dietary means as accurately as that of normal milk after analysis of the relationships among the energy value and the concentrations of total solids, solids-not-fat, and milk.
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Development of a Comprehensive System of Feed Analyses and its Application to Forages
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Regulation of Feed Intake in Dairy Cows. I. Change in Importance of Physical and Physiological Factors with Increasing Digestibility
TL;DR: It was concluded that physical and physiological factors regulating feed intake change in importance with increasing digestibility, and intake appeared to be dependent on metabolic size, production, and digestibility at higher digestibilities.
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Energetics of Body Tissue Mobilization
P.W. Moe,H.F. Tyrrell,W.P. Flatt +2 more
TL;DR: It appears unrealistic to relate tissue energy changes to live weight change without some consideration being given to the change in rumen fill, but data from this laboratory suggest that milk may be produced from body tissue reserves with an efficiency of 82 to 84% and that theBody tissue reserves may be replenished in late lactation by deposition of body tissue with a efficiency equal to or exceeding that of milk production.