Productive performance of Jamunapari goat under semi intensive system of management

Twenty Jamunapari goats were reared in the institute goat farm in semi-intensive system of management to study the productive performance of goat under the system. It was observed that average live weight of grower uncastrated male kids at birth, 3, 6, 9 and 12 th months of age were 2.94 ± 0.19, 8.97 ± 0.53, 15.47 ± 0.66, 18.63 ± 0.44 and 22.48 ± 0.64 kg respectively. Average daily gain during the year was found to be highest in first week ie 110.67 ± 6.52 g/day with an average value of 47.41 ± 3.76 g/day. ANOVA revealed that age had highly significant (P < 0.01) effect on all the body measurements. It was found that age was significantly (P < 0.01) and positively correlated with body length (r = 0.860), body height (r = 0.852) and heart girth (r = 0.853). Multiple regression analysis of live weight of goat with air temperature, relative humidity, temperature humidity index and effective temperature indicated non-significant effect of environmental components on live weight of goats. However, live weight of goat was negatively correlated with THI. It was observed that average daily gain in grower and finisher goat were reduced by 46.11 g/d (P < 0.01) and 24.14 g/d (P < 0.01) respectively per°C rise of effective temperature.