Performance evaluation of purebred and crossbred dairy cows under tropical conditions
2001
Matias, J.M. | Gonzaga, E.A. | Delos Santos, J.E. | Salac, H.S.
The selection of suitable dairy animals for a given set of conditions and objectives requires evaluation of the actual field performance. This paper aims to determine the productive and reproductive performance of dairy cows reared under tropical conditions as influenced by their blood composition. Using Completely Randomized Design (CRD), animals were grouped according to the following treatments: 100% Holstein-Friesian (100 HF), Holstein-Friesian x Sahiwal (HFSH) and Holstein-Friesian x Red Sindhi (HFRS) using milk yield, length of lactation, services per conception, days open, calving interval, age at first breeding, age at first calving and post-partum breeding as productive and reproductive parameters. Total milk production and average daily milk yield were found to be higher in both HFSH and HFRS than in 100 HF under local management conditions. Better reproductive parameters such a lower number of services per conception, younger age at first breeding and calving, shorten days open and calving interval were found likewise in HFSH and HFRS than in 100 HF animals
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