Determination of dietary restriction for ZL chicks in the gilt period from 9 to 19 weeks of age
This study aimed to determine the feed restriction for ZL chicks in the gilt stage from 9 to 19 weeks of age. Experimental arrangement with 3 feeding levels equal to 90% (plot 1), 87% (lot 2) and 84% (lot 3) of Luong Phuong chicken. Survey on breeding from 20 to 40 weeks of age of chicken ZL. The obtained results showed that: In the pupal stage (1-19 weeks old), ZL chickens of Lot 1 ate all 7923.2 g/head, Lot 2 ate 7714.6 g/head and Lot 3 ate all 7512 ,4 g/head. Body weight of ZL chicken in batch 1 was 1742.7 g/head, batch 2 was 1706.3 g/head and batch 3 was 1660.3 g/head.
Reproductive stage (20-40 weeks of age). Lot 1 has a laying rate of 48.06% and egg yield per hen of 70.65 eggs, consuming food for 10 eggs of 2.70 kg. Corresponding lot 2 is 48.28%, 70.97 fruits and 2.69 kg; Lot 3 is 44.36%, 65.22 fruits and 2.94 kg. The reproductive parameters of ZL chickens raised in plot 2 (87%) were the best. Thus, raising ZL gilts from 9 to 19 weeks of age at a feed rate equal to 87% of the feed rate of Luong Phuong chickens is appropriate.
