An experiment was conducted to evaluate the effect of time of initiation of feeding after hatching and influence of dietary lysine supplementation during realimentation on productivity, carcass characteristics and mortality of Ross 308 broiler chickens. The study was a factorial arrangement in a complete randomized design. Three hundred and sixty unsexed day old Ross 308 broiler chicks with an initial weight of 30 ± 2 g per bird were assigned to 12 treatments in a 4 (times of initiation of feeding) x 3 (lysine supplemental levels) factorial arrangement with three replications, each having ten birds. The experimental diets were isocaloric and isonitrogenous but with different lysine supplementation levels. Lysine supplementation started three days after hatching. Lysine supplementation during realimentation only reduced the number of days of 'catch-up' irrespective of time of initiation of feeding after hatching and thereafter had no effect (P>0.05) on productivity and mortality of the birds. However, the birds 'caught-up' within eight days of realimentation. This compensatory growth could be explained in terms of higher intakes. Generally, more than 50 % of the birds died between 1 and 3 days of age when initiation of feeding after hatching was above 36 hours. It is concluded that time of initiation of feeding above 36 hours after hatching is not desirable, mainly because of its negative effect on mortality. Beneficial effect of lysine supplementation in the diet of broiler chickens subjected to delayed initiation of feeding after hatching could be exploited in accelerating the rate of 'catch-up' growth response.
|Journal||Livestock Research for Rural Development|
|Publication status||Published - Oct 2007|
All Science Journal Classification (ASJC) codes
- Agricultural and Biological Sciences(all)