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Efficiency of utilization of various phosphorus feed supplements in dairy cows' rations


, : Efficiency of utilization of various phosphorus feed supplements in dairy cows' rations. Khimiya v Sel' skom Khozyaistve 10(8): 625-627

During inwintering 1967/68, 24 Russian Black Pied cows in 4 matched groups were fed for 116 days with identical basic rations of lucerne and Sudan-grass hay, maize silage, Fodder beet and concentrates, plus (i) defluorinated phosphate (control), (ii) CaHPO4, (iii) Ca(H2PO4)2 or (iv) Na2HPO4 in quantities giving P levels of 0.42% DM. Group (iv) received supplementary Ca during the period of max. milk yield. Average 4% FCM yields/day were (i) 14.99, (ii) 15.02, (iii) 16.07 and (iv) 14.46 kg.

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