Datt, MaheshMahur,Giriraj2024-06-222024-06-222022https://krishikosh.egranth.ac.in/handle/1/5810210750The present study was conducted at Dairy Farm of S.K.N. College of Agriculture, Jobner to assess the productive, reproductive performance and milk composition of Gir cows under semi-arid conditions. The data of 33 Gir cows those had completed three consecutive lactations was collected from the records maintained at college Dairy Farm over a period of Five years (2017 to 2022) for studying productive and reproductive performance. A total of 12 Gir cows which were in early lactation were selected for studying milk composition. This study was conducted from March 2022 to April 2022 with 216 milk samples from Gir cows. This herd is being maintained at S.K.N. College of Agriculture, Jobner Dairy Farm under semi-arid condition. Productive and reproductive performances were analyzed to determine, total lactation milk yield, standard milk yield, lactation length, dry period, service period, gestation period and calving interval during second, third and fourth lactation. The overall means obtained for total lactation milk yield, standard milk yield (305-DMY), lactation length, dry period, service period, gestation period and calving interval in Gir cows were 1833.45±84.91 litres, 2095.81±75.58 litres, 266.04±6.69 days, 128.94±7.16 days, 113.36±7.72 days and 281.53±0.35 days 394.98±7.78 days, respectivelyEnglishThesis