Effects of treatment of dairy cows with recombinant bovine somatotropin over three or four lactations.

Abstract

Jersey, Dutch Red and White, and Friesian cows were subcutaneously injected with 640 mg of recombinant bST at 28-d intervals from 87 to 115 d after calving through four successive lactations. A TMR (6.72 MJ of NEL) and 168 g of CP/kg of DM) was fed for ad libitum consumption. The bST effects per day were 3.3 kg for milk yield, 189 g for fat yield, 109 g for… (More)

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@article{Oldenbroek1993EffectsOT, title={Effects of treatment of dairy cows with recombinant bovine somatotropin over three or four lactations.}, author={J K Oldenbroek and G. J. Garssen and Leon Jonker and Jonathan Wilkinson}, journal={Journal of dairy science}, year={1993}, volume={76 2}, pages={453-67} }