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Effect of service period and season of calving on lactation traits among crossbred cows



Effect of service period and season of calving on lactation traits among crossbred cows



Indian Veterinary Journal 71(11): 1094-1097



The influence of service period (SP) and season of calving on peak daily milk yield (PY) first 90-, 120-days and total lactation milk yield (IMY), lactation length (LL), milk yield per day of first 90-, 120-days and total lactation were studied in 99 Jersey times Ongole half-bred cows in Andhra Pradesh. The effects of SP on PY and part lactation yields were not significant, while on IMY and LL were highly significant. The milk yield per day of lactation tended to decrease with increase of SP. Each additional day of SP resulted in 2.93 Kg more IMY and 0.55 days LL. The correlation coefficients of SP with IMY and LL were positive and highly significant. Summer calvers had higher mean peak yield. The 90-, 120-day yields and IMY were higher and LL shorter among winter calvers compared to others. The SP and CI were also shorter among the winter calvers. Though none of the differences were significant, the results indicated that winter calvers had comparatively higher production and reproduction performance compared to others.

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Accession: 002604412

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