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
Citations
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Interrelationships between energy balance and postpartum reproductive function in dairy cattle.
W.R. Butler,R.D. Smith +1 more
TL;DR: Negative energy balance probably acts similarly to undernutrition and may manifest in delayed ovarian activity by impinging on pulsatile secretion of LH, and lower availability of glucose and insulin may also decrease LH pulsatility or limit ovarian responsiveness to gonadotropins.
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Chemical factors involved in ruminal fiber digestion.
TL;DR: In this article, chemical constraints that may be responsible for the decrease in fiber digestion are explored, and a major factor appears to be rumen pH, to approximately 6.5 or 5.0, which results in depressed growth rates and decreased fibrolytic organisms.
SYMPOSIUM: DRY MATTER INTAKE OF LACTATING DAIRY CATTLE Integration of Metabolism and Intake Regulation: A Review Focusing on Periparturient Animals
TL;DR: In this paper, the authors identified and discussed important metabolic factors involved in the regulation of dry matter intake in dairy cattle and their integration with metabolism, and discussed the adaptations of intake and metabolism and discussed mechanisms of intake regulation.
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Integration of metabolism and intake regulation: a review focusing on periparturient animals.
TL;DR: Much research is needed to clarify the complex regulation of VDMI in lactating dairy cows, particularly in the periparturient animal, and evidence supporting the integration of the regulation of intake and metabolism is presented.
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Relationship between ovarian activity and energy status during the early postpartum period of high producing dairy cows.
TL;DR: Anestrus cows and cows showing corpus luteum activity between d 40 and 60 obtained more energy from body reserves for milk production the first 2 wk of lactation, than cows cycling prior to d 40.
References
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Complete Feed Rations for Lactating Dairy Cows
TL;DR: Ad libitum feeding of ground hay, ground corn cobs, and cottonseed hulls complete feeds were compared in a Latin-square changeover design to compare methods of feeding for milk, FCM, and complete feed yields.
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Comparisons of two different systems of feeding dairy cows for three consecutive lactations.
J.C. Larkin,O.T. Fosgate +1 more
TL;DR: Comparisons between group-feeding and total confinement do not appear to be detrimental to herd life or health of dairy cows, and complete rations and concentrate :silage rations are very similar in their abilities to maintain milk, fat, and protein production.
Journal Article
Complete diets for dairy cows. 1. The health, reproductive performance, voluntary food intake and milk yield of cows fed with diets of different roughage content throughout lactation.
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Effect of Production and Ration Composition on Production Performance of Cows Fed Mixed Rations of Corn Silage and Concentrates
S.L. Spahr,K.E. Harshbarger +1 more
TL;DR: Corn silage and concentrates were mixed at time of feeding to form low-medium-and high-energy complete feeds which were fed for four 8-week periods as the only source of energy and protein to groups of cows producing low, medium, and high daily amounts of milk.