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Showing 1 to 9 of 9 for “"bovine somatotropin"”.
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Lactational Evaluation of Recombinant Bovine Somatotropin with Corn and Barley Diets
… 10.3, 20.6, and 30.9 mg/hd/d of recombinant bovine somatotropin injected wk 15 through 44 postpartum. Forage dry matter was 80% corn silage and 20% alfalfa hay. Forage to concentrate ratio in total mixed diets varied from 50:50 to 70:30 with milk production. For the entire lactation, milk …
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Interactions of Bovine Somatotropin and Nutrition on Milk Production and Composition of Dairy Cows
… 2 factorial arrangement to study interactions of bovine somatotropin (bST) and nutrition during weeks 5 through 20 postpartum. Main effects were bST (-or+ 10.3 mg per day) and diet (control, C; or high protein and energy, HPE). Diet C was formulated to contain 16.3% crude protein and 1.65 Meal net …
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Regulation of beef heifer productivity by dietary energy and prepubertal administration of bovine somatotropin
Weanling heifer calves (n = 452) grazed tall fescue pastures and were fed a high (H) or low (L) amount of corn supplement during a postweaning treatment period of 136 d. Postweaning gain of heifers receiving L and H was.43 and.62 kg/d, respectively. Heifers receiving H were heavier, and had more …
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Reproductive performance of Holstein cows treated with prostaglandin F2a, gonadotropin releasing hormone, and recombinant bovine Somatotropin
… effects of presynchronization and recombinant bovine somatotropin (rbST) on conception rates following a timed insemination (TAI) protocol in lactating dairy cows. A further objective included the evaluation of the efficacy of the Early Conception Factor (ECF) test kit. Recombinant bST may …
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Composition and Flavor of Milk and Butter from Cows Fed Unsaturated Dietary Fat and Receiving Bovine Somatotropin
… to milk (Wrenn et al., 1976). Administration of bovine somatotropin increased milk yield, while having a negligible effect on milk composition (Baer et al., 1989; Eppard et al., 1985a; Kindstedt et al., 1991). Baer et al. (1989) and Eppard et al. (1985a) observed an increase in the unsaturated …
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Ovarian and Growth Hormone Regulation of Mammary Growth and Transcript Abundance in Prepubertal Dairy Heifers
… regulators of mammary growth and development in bovine mammary gland; but information on endocrine regulation during early prepubertal period is limited. Our overall objective was to study the regulation of mammary growth and development as well as transcript abundance in early prepubertal bovine …
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The Physiology of Enhanced Milk Yield Through Increased Milking Frequency in Early Lactation
… IMF that increase MY by comparing it to bovine somatotropin (bST). Cows that underwent early lactation IMF received bST at 80 DIM. Both IMF and bST treatments significantly enhanced MY, but there was no interaction or synergistic effect between treatments. We surmised that IMF and bST …
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Characteristics of Milk and Reduced Fat Cheddar Cheese from Cows Fed Extruded Soybeans and Niacin
… stage of lactation, and use of recombinant bovine somatotropin. It has been found that feeding cows supplemental fat increases the concentration of unsaturated fatty acids in milk fat (Grummer, 1991). While this may be appealing to the consumer there are still some potential problems which …
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Influência da somatotropina recombinante bovina (rbST) aplicada em receptoras de embriões bovinos, no dia do estro, sobre variáveis reprodutivas
… no dia do estro, de 500 mg de rbST (somatotropina bovina recombinante) em receptoras inovuladas com embriões transferidos à fresco e de 250 e 500 mg de rbST em receptoras inovuladas com embriões descongelados, sobre a concentração sérica de progesterona (P4) no dia da inovulação e a …