Major Advances in Applied Dairy Cattle Nutrition
نویسندگان
چکیده
منابع مشابه
Ruminant Nutrition: Dairy Cattle
A total of 45 lactating Holstein cows averaging 617 kg of BW were allotted at wk 20 of lactation to 9 groups of 5 cows blocked for similar DIM to determine the effects of feeding different concentrations of flax hulls (FH) on DMI, milk production, milk composition, and digestion. Cows within each block were assigned to one of the 5 isoenergetic TMR containing 0, 5, 10, 15 or 20% FH. The experim...
متن کاملMajor advances associated with environmental effects on dairy cattle.
It has long been known that season of the year has major impacts on dairy animal performance measures including growth, reproduction, and lactation. Additionally, as average production per cow has doubled, the metabolic heat output per animal has increased substantially rendering animals more susceptible to heat stress. This, in turn, has altered cooling and housing requirements for cattle. Sub...
متن کاملRuminant Nutrition: Dairy Cattle
Replacing dietary starch with sugar and sodium-propionate has been reported to improve performance in ruminant animals. This experiment was conducted to determine the effects of replacing different sources of energy with barley grain in dairy calves′ starter on weaning, dry matter intake, average daily gain (ADG), feed efficiency, skeletal growth, and fecal score. A total of 21 male calves (42 ...
متن کاملRole of Chromium in Dairy Cattle Nutrition
Chromium (Cr) is an essential trace element for humans (Anderson, 1992) and laboratory animals (NRC, 1997). It is the trivalent form of the molecule that is active biologically, the hexavalent form is actually toxic to many animal cells (NRC, 1997). Chromium acts through a protein, once named glucose tolerance factor (GTF), now more commonly referred to as the glucose transporter. This protein ...
متن کاملNutrition and Reproduction in Dairy Cattle
Nutrition has an important impact on the reproductive performance of dairy cattle. Energy is the major nutrient required by adult cattle, and inadequate energy intake has a detrimental impact on reproductive activity of the female bovine. Cows under negative energy balance have extended periods of anovulation. Postpartum anestrus, as well as infertility, is magnified by losses of body condition...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 2006
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(06)72199-3