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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TLDR
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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Abrupt Changes in Forage-Concentrate Ratios of Complete Feeds Fed Ad Libitum to Dairy Cows
TL;DR: In this paper, the effects of abrupt changes in energy of complete feeds offered individually ad libitum to 68 lactating cows plus the effect of drying off on intake of diets in late lactation and early dry period were studied.
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Relationships between measures of feed efficiency and transmitting ability for milk of Holstein cows.
TL;DR: Energy efficiency showed linear increases when regressed on cow transmitting ability for fat-corrected milk, but other measures of dietary utilization were unrelated to milk yield.
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One Group Versus Two Group System for Lactating Cows Fed Complete Rations
TL;DR: Although milk production was greater in the one group than the two group system, income over feed costs were $30/cow per year greater for two groups, primarily because of reduced intake of concentrate.
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Incidence and treatment of abnormal postpartum ovarian function in dairy cows
TL;DR: The results of this study indicate that the incidence of abnormal postpartum ovarian function in this herd was 30.2% and that the nontreated cows experienced more days open and required more services per conception than the treated cows, those that were cycling normally on the initial examination, and those that responded spontaneously by Day 14.
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Optimum Rations for Group Feeding
TL;DR: In this article, the advantages and limitations of feeding a single mix or feeding multiple mixes of feeds are discussed and specifications for rations and sample ingredient mixes for various stages of lactation and yields of daily milk are presented.
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.