Vol. 11, Special Issue 3 (2022)

Author(s):
KB Savalia, AR Ahlawat, VV Gamit, PN Chaudhari and GP Sabapara

Abstract:
The present study was carried out using data of first lactation records of 513 Gir cows sired by 75 bulls spread over a period of 34 years (1981 to 2014), maintained at Cattle Breeding Farm, Junagadh Agricultural University, Junagadh. Analysis was carried out by least squares analysis method described by Harvey (1966). The overall least squares means for first lactation monthly test day milk yield (FLMTMY) varied from 3.39 + 0.17 kg (FLMTMY10) to 6.40 + 0.15 kg (FLMTMY3). Only FLMTMY3 (peak yield phase) was influenced significantly (P<0.05) due to variation of season of calving. The period of calving had highly significant (P<0.01) effect on all MTDMY. The AFC had significant (P<0.05) effect on FLMTMY1, FLMTMY2 and MTMDY5. However, calf birth weight had highly significant (P<0.01) effect on FLMTMY1 and FLMTMY2 while its effect was significant (P<0.05) on FLMTMY4.