The aim of this study was to determine the responses of lactating cows to bovine somatotropin (GH) and supplementary dietary calcium salts of long-chain fatty acids (Ca-LCFA). 80 Friesian cows (approx. 119 days post partum) were randomly assigned to 1 of 4 treatments: (1) control diet (C); (2) 0.5 kg/day added Ca-LCFA (Ca-LCFA); (3) control diet + GH (GH); (4) 0.5 kg/day added Ca-LCFA + GH (Ca-LCFA + GH). GH, 640 mg/injection, was administered in a sustained-release vehicle at 28-day intervals for 84 days. At 7 days post-injection, GH decreased milk urea content ( P<0.01) and increased the proportion of long-chain fatty acids in milk fat ( P<0.05).
Effect of rbST and calcium soaps on the performance of lactating dairy cows / V. Dell'Orto, G. Savoini, E. Salimei, D. Cattaneo, F. Cheli. - In: JOURNAL OF DAIRY SCIENCE. - ISSN 0022-0302. - 75:Supplement 1(1992), pp. 179-179.
Effect of rbST and calcium soaps on the performance of lactating dairy cows
G. SavoiniSecondo
;D. CattaneoPenultimo
;F. CheliUltimo
1992
Abstract
The aim of this study was to determine the responses of lactating cows to bovine somatotropin (GH) and supplementary dietary calcium salts of long-chain fatty acids (Ca-LCFA). 80 Friesian cows (approx. 119 days post partum) were randomly assigned to 1 of 4 treatments: (1) control diet (C); (2) 0.5 kg/day added Ca-LCFA (Ca-LCFA); (3) control diet + GH (GH); (4) 0.5 kg/day added Ca-LCFA + GH (Ca-LCFA + GH). GH, 640 mg/injection, was administered in a sustained-release vehicle at 28-day intervals for 84 days. At 7 days post-injection, GH decreased milk urea content ( P<0.01) and increased the proportion of long-chain fatty acids in milk fat ( P<0.05).
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