Effect of forage-concentrate ratio in complete feeds fed ad libitum on energy intake in relation to requirements by dairy cows.
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
Citations
More filters
Journal ArticleDOI
Association between energy balance and luteal function in lactating dairy cows.
TL;DR: In lactating cows, secretion of progesterone is reduced by spontaneous caloric deficit and is modulated by timing and magnitude of maximal caloric deficit, which is a potential source of infertility in lactating dairy cows.
Journal ArticleDOI
Fat cow syndrome.
TL;DR: The fat cow syndrome refers to a combination of metabolic, digestive, infectious, and reproductive conditions which affects the obese periparturient cow which develops primarily due to faulty feed management which permits excessive consumption of unbalanced diets.
Journal ArticleDOI
Effects of Prepartum Diet, Inert Rumen Bulk, and Dietary Polyethylene Glycol on Dry Matter Intake of Lactating Dairy Cows
T.R. Johnson,D.K. Combs +1 more
TL;DR: Compensation for replacement of rumen contents with inert bulk occurred by expansion of organ volume and, in trial 1, by a reduction in rumen retention time, which may explain why reductions in voluntary intake after addition of inert bulk to the reticulorumen often are proportionally lower than would be predicted from the volume of bulk added.
Journal ArticleDOI
Variations in milk output and milk protein content in response to the level of energy supply to the dairy cow: A review
J.B Coulon,B Rémond +1 more
TL;DR: The purpose of this review was to determine with accuracy the effect of the lactation stage, length of under/over-feeding, age and production potential of the animals on the milk output and milk protein content response to variations in the energy supply.
Journal ArticleDOI
Factors associated with variation in the superovulatory response of cattle
TL;DR: The development of techniques such as transrectal ultrasonography, have enabled a re-evaluation of ovarian dynamics during superovulation of cattle and increased knowledge of the mechanisms controlling follicular development, ovulation and corpus luteum function are increased.
References
More filters
Journal ArticleDOI
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.
Journal ArticleDOI
Development of a Comprehensive System of Feed Analyses and its Application to Forages
Journal ArticleDOI
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.
Journal ArticleDOI
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.