STUDIES ON SOME LIFE TIME TRAITS IN CROSSBRED DAIRY COWS

摘要

Life time traits of Dairy cows like average herd life, AFC, productive life, no. of lactation completed in the life time, life time milk production up to 3rd and 5th lactation were observed as 2987.16 days, 1178.64 days,1822.50 days, 4.33 no., 6078.21kg and 10,828.24 kg respectively. It was revealed that halfbreds are superior that 3/4th crosses in terms of herd life, AFC, productive life and no. of lactation completed in lifetime. However, on the basis of life time milk production, 3/4th crosses showed superiority over halfbreds. It was further observed that Jersey halfbreds showed lowest AFC and also remained dry for minimum no. of days out of productive life than other crossbred groups.