Utilization of Nitrates by Dairy Cows
نویسندگان
چکیده
منابع مشابه
Influence of mechanical processing on utilization of corn silage by lactating dairy cows.
We conducted three experiments to determine the influence of mechanical processing on corn silage utilization by lactating dairy cows. Total mixed rations contained either unprocessed or processed corn silage harvested between 1/4 and 3/4 milk line. In trial 1, 12 multiparous Holstein cows were used in a replicated double switchback design with 21-d periods. Intake of dry matter (DM) was increa...
متن کاملEffect of formic acid or formaldehyde treatment of alfalfa silage on nutrient utilization by dairy cows.
Third-cutting alfalfa with 37% DM was ensiled untreated or treated with either 2.8 g of formic acid/100 g of DM or .31 g of formaldehyde/100 g of DM and fed to lactating dairy cows in two experiments. Silage treated with formic acid had the lowest pH and concentrations of NPN, NH3, and total free AA. Both treatments decreased rumen in vitro protein degradability but did not affect in vitro rume...
متن کاملImpact of Vitreousness, Processing, and Chop Length on the Utilization of Corn Silage by Dairy Cows
Flint corn has a greater proportion of vitreous endosperm than dent corn (Philippeau et al, 1999). Philippeau and Michalet-Doureau (1997) observed that increased kernel vitreousness was associated with decreased ruminal starch degradation. Increased kernel vitreousness may explain the reduction in total-tract starch digestibility observed for mature whole-plant corn silage (WPCS; Bal et al., 19...
متن کاملEffect of Lactobacillus Rhamnosus and Propionibacterium Freudenreichii Inoculated Silage on Nutrient Utilization by Dairy Cows
First cut red clover-grass mixture sward were ensiled in two pits with inoculant (Lactobacillus rhamnosus + Propionibacterium freudenreichii ssp. Shermanii) and without any additives. Fermentation quality, nutrient losses and aerobic stability of silages were determined. The inoculated silage had no butyric acid, nutrient losses were lowered by 19.4%. In inoculated silage organic matter digesti...
متن کاملEffect of Steam Heating Alfalfa Hay on Utilization by Lactating Dairy Cows
Alfalfa hay was steam heated for an average of 47 min at 100 to 110°C; net ruminal protein escape (total escape minus ADIN x 6.25), estimated in vitro, was 50% versus 29% for control hay. Heating increased ADIN content from 4.6 to 15.3% of total N and increased NDF from 43 to 53% of DM. In trial 1, 14 cows averaging 81 DIM and 30 kg/d of milk were fed, in a switchback design, diets containing 1...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1972
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(72)85549-8