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Showing 1 to 20 of 341 for “"Dairy Cows"”.
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Carnitine for lactating dairy cows
… effects of supplemental carnitine for lactating dairy cows. In the first experiment, carnitine (ca. 6 g/d) was administered into either the rumen or abomasum. Concentrations of carnitine in milk, plasma, liver, and urine increased similarly for both sites of carnitine administration. Milk yield …
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Impact of relocation on dairy cows
… determine the impact of relocation on lactating dairy cows. In experiment one, locomotion was scored on a 4-point scale where 1 = normal and 4 = lame. Cleanliness was scored on a 4-point scale where 1 = little or no manure visible and 4 = heavy plaques of manure on 3 body regions: udder, lower …
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Increasing estrus expression in lactating dairy cows
… before inducing luteolysis or (2) exposing cows to estradiol cypionate (ECP) or testosterone propionate (TP) after luteolysis would increase occurrence and intensity of estrus. In experiment 1, cows (n = 154) were fitted with an AMS collar and a pressure-sensitive, rump-mounted device (HW) …
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Effects of Feeding Leptaden to Dairy Cows
… harmful effects on the health of women or cows. On the basis of the lactogenic and galactagogue properties of the Leptaden, the research reported in this thesis was undertaken with the following objectives: 1. To determine the effects of feeding Leptaden to dairy cows on milk production and …
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Urea-N Recycling in Lactating Dairy Cows
… microbial N flow. Eight mid-lactation Holstein cows were assigned to a repeated 4 x 4 Latin square. The diets were isoenergetic with RDP and RUP concentrations arranged in a factorial design (10.0 and 12.5% RDP and 5.6 and 8.1% RUP as a percentage of DM). The 10.0% RDP diets resulted in greater …
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L-Carnitine Supplementation for Periparturient Dairy Cows
… and decreases liver lipid accumulation in dairy cows. In experiment 1, 8 mid-lactation cows were abomasally-infused with water or 20 g/d of L-carnitine in combination with ad libitum or restricted dry matter intake. Carnitine infusion increased in vitro fatty acid oxidation by liver slices …
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Niacin-lipid interactions in lactating dairy cows
Niacin-lipid interactions in lactating dairy cows were investigated. Treatments were: control, nicotinic acid (12 g/d), calcium salts of long chain fatty acids (3% diet dry matter), and calcium salts of fatty acids with nicotinic acid. Cows received treatment diets from week 2 to week 14 postpartum.
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Simple versus complex ration for lactating dairy cows
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science, 1931
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Grazing and Feeding Management of Lactating Dairy Cows
… to determine time patterns of grazing between cows supplemented with different forms and amounts of corn. Also rumen fermentation parameters were measured in cows supplemented with two different types of corn. In study 2, milk yield was measured when grazing pasture was supplemented to …
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Artificial Induction of Lactation in Nonbreeder Dairy Cows
Thirty-four cows (26 Holsteins and 8 Jerseys) were subjected to an estrous synchronization protocol administering 2 PGF2Æ Ã injections 11 d apart prior to beginning the lactation-induction protocol. Artificial induction of lactation yielded a 92% success rate for Holstein cows with success defined …
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Grouping and feeding policies for lactating dairy cows
… matter intake and milk production in Holstein dairy cows. Equations predicting 4% FCM and dry matter intake were derived from this data using ordinary least squares. Days in milk, available nutrients, calving date, and previous period 4% FCM accounted for 90% of the variation in 4% FCM for …
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Evaluation of Supplementing Brewer's Yeast to Lactating Dairy Cows
… used as effective, natural feed additives in the dairy industry to improve animal health and performance. Yeast product supplementation can be beneficial in the diet of lactating dairy cows by increasing feed efficiency, alleviating disease, and improving production performance under heat stress. …
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An investigation of social structure in housed dairy cows
The changing landscape of the UK’s dairy farms poses increasing challenges to farm staff in terms of monitoring individuals behaviour within increasing herds, and more intensive conditions. Failure to detect behavioural changes may be costly, both from a welfare and financial perspective, as such …
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Protein Nutrition of Dairy Cows During the Transition Period
… DMI, BCS, and BW did not differ significantly. Cows fed AMP postpartum tended (P = 0.10) to produce more 4% fat-corrected milk (FCM) than SB-fed cows (33.8 vs 31.8 kg/d). Gross efficiency (FCM/DMI) was greater (P < 0.05) for the cows fed AMP postpartum than for cows fed SB (1.88 vs 1.70). An …
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Nutritional Strategies for Optimizing Nitrogen Utilization by Dairy Cows
… and three experiments with multiparous Holstein cows were conducted to test the hypothesis that the crude protein (CP) content of the diet can be decreased to improve the efficiency of N utilization for milk production without compromising the supply of metabolizable protein and the lactational …
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Economic Optima in Freshening Dairy Cows in Northeastern Illinois
Made available in DSpace on 2014-12-04T21:48:10Z (GMT). No. of bitstreams: 1 6000246.pdf: 6467020 bytes, checksum: 56ce723e9f6c0dbf09a71193e0e7b8cc (MD5) Previous issue date: 1959
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Evaluation of systematic breeding programs in lactating dairy cows
Observing cows in estrus and inseminating them at the optimal time are necessary steps for effective reproductive management of a dairy herd. However, increasing herd sizes can lead to reproductive inefficiency resulting in decreased profits on dairy herds. Synchronization of estrus, through …
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