Influence of various non genetic factors on production and reproduction traits in Rathi cattle
2013
Singh, Prem | Pannu, Urmila | Kumar, Virendra | Kajla, Mahipal | Rai, Kuldeep | Singh, Sakainder
597 records of 198 Rathi cows over a period of 33 years (from 1977 to 2010) maintained at Livestock Research Station, CVAS (Bikaner) were used in the present investigation. The reproduction parameters obtained from over all lactation records were average age of heifers at first calving of 1470.49±41.798 days, calving interval of 463.83±11.501 days with service period of 195.16±8.988 days. The production traits were estimated as lactation length of 288.61±4.550 days, dry period of 184.59±10.853 days, 1720.24±49.793 Itrs milk yield with 5.77±0.142 Itrs milk per day of lactation length and 1660.63±33.984 Itrs 300 days milk yield. A mixed model least square analysis showed significant effect of sire on all the traits. Effect of period was found significant for service period, dry period and lactation length whereas effect of season and effect of parity was not significant for all reproduction and production traits. The regression of reproduction and production traits on age at first calving was found non significant.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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