A Study of the Milking and Reproduction Performances of Grazing Indigenous Cattle at a Semi Urban Area of Bangladesh

Islam, S. S.; Ashraf, A.; Islam, A. B. M. M.

doi:2000.13.6.837

Article

Animal Products

Asian-Australasian Journal of Animal Sciences 2000;13(6): 837-841.
https://doi.org/10.5713/ajas.2000.837 Published online June 1, 2000.

A Study of the Milking and Reproduction Performances of Grazing Indigenous Cattle at a Semi Urban Area of Bangladesh

S. S. Islam, A. Ashraf, A. B. M. M. Islam

Abstract

The study was conducted at semi urban area in Bangladesh. It was based on a field survey by a prepared questionnaire. Various milking and reproduction performance were analyzed. The effects of grazing hour were found significant on age at weaning (AW) (p<0.001), age at first heat (AFH) (p<0.001), age at first conception (AF conception) (p<0.001), age at first calving (AF calving) (p<0.001), post partum heat period (PPHP) (p<0.001), calving interval (CI) (p<0.001), lactation length (LL) (p<0.001) and total lactational production (TLP) (p<0.001). The effects of concentrate feed were significant on AW (p<0.01), AFH (p<0.01), AF conception (p<0.001), AF calving (p<0.001), PPHP (p<0.001) CI (p<0.001), LL (p<0.001) and TLP (p<0.001). The effects of management level were significant on AW (p<0.001), PPHP (p<0.01), CI (p<0.001), daily milk yield (DMY) (p<0.05) and TLP (p<0.001). The overall mean values were 251.88 2.97 days for AW, 37.29 0.33 months for AFH, 38.43 0.34 months for AF conception, 47.62 0.34 months for AF calving, 1.30 0.02 number of services per conception (NSPC), 191.57 3.92 days for PPHP, 17.02 0.15 months for CI, 2.49 0.06 kg for DMY, 247.23 3.51 days for LL and 590.40 15.00 kg for TLP.

Keywords: Milking; Reproduction; Performances; Indigenous; Grazing Cattle