1Department of Animal Husbandry & Dairying, Banaras Hindu University, Varanasi, Uttar Pradesh, India
2Department of Animal Science & Dairy Science, Dr. D Y Patil College of Agriculture, Talsande-415 612, Maharashtra, India
3Department of Animal Science & Dairy Science, Sharad College of Agriculture, Jainapur, Maharashtra, India
Department of Animal Husbandry & Dairying, Raja Balwant Singh College, Bichpuri-283 105, Agra, Uttar Pradesh, India
*Corresponding author's e-mail: sawantpushkraj@gmail.com
Online published on 6 June, 2016.
The present study was undertaken on data of 150 Frieswal cows (a new strain of Sahiwal x Holstein Friesian) maintained at Military Dairy Farm, Agra, over a period of 15 years from 1996–2010, based on age at first calving. The overall means for age at first calving (AFC), weight at first calving (WFC), first lactation milk yield (FLMY), first lactation period (FLP), first dry period (FDP) and first calving interval (FCI) were 928.07±0.08 days, 369.87±0.92 kg, 4054.35±22.14 litres, 301.84±0.26 days, 99.40±0.15 days and 401.33±0.33 days respectively. The period of calving has significant influence on AFC and WFC, whereas non-significant influence on FLMY, FLP and FDP. The season showed significant influence on all the traits under study except FLMY. Both period and season has highly significant influence on FCI.
Age at first calving, First lactation milk yield, First lactation period, First dry period, First calving interval, Frieswal, Weight at first calving
