Restricted suckling of tropical dairy cows by their own calf or other cows' calves.

摘要: The objective of this study was to compare restricted suckling tropical cows by their own or another cow's calf with artificial rearing the calves and no suckling. In Exp. 1, were mechanically milked twice daily, after which for 15 min they either suckled (Treatment O) multiple-suckled other cows' M) unsuckled, reared artificially A). Machine milk yield similar three treatments, but in two treatments additional consumed increased (P = 0.02) total production (2,682, 2,634, 2,336 kg/lactation Treatments O, M, A, respectively). fat concentration reduced 0.05) (2.90, 3.07, 3.20% 0, respectively), sampled just before (to represent that taken calves) had a high (mean 7.9%). somatic cell count also suckling, from 106,000/mL A) 85,000/mL 95,000 O). Cows lost more weight body condition than whose artificially, intermediate. postpartum interval first estrus 0.01) 31 d conception rates service 44% compared 77% 0.01). growth calves, given recommended allowances. concentrates, available ad libitum all gained 0.03) 0.07 kg/d calves. A second experiment determined once daily did not reduce reproductive performance rearing. We conclude increases reduces early lactation. have those artificially.