Post-mould body weight and production performance of commercial layers induced to moult under various nutritional regimes
2001
Akram, M. (University of Agriculture, Faisalabad (Pakistan). Department of Poultry Husbandry) | Mushtaq-Ul-Hassan, M. | Farid, S. | Dar, B. | Raza, N.M. | Khanum, S.
The experiment was carried out on 288 commercial (White Leghorn) egg laying hens available at the age of 71 weeks. Birds were randomly divided into 18 experimental units comprising 16 birds each. These experimental units were randomly allotted to six treatment groups designated as A,B,C,D,E, and F with 3 reprications in each. All six groups were given a pre-moult treatment of vaccination and medication prior to subjecting them to the moulting schedule. Group A was maintained as a control. During the post-moult period each bird was offered 110 g/day layer mash. Post-moult hen-day production (%), egg mass and feed efficiency (per kg egg mass basis) varied significantly when compared with non-moulted birds. Less body weight was gained by the birds which were served with restricted feed (1.71 +/- 0.11) and corn (1.74 +/- 0.15) during the moult. The highest hen day production (%) (82.87 +/- 6.89) and greatest feed efficiency (either per dozen eggs; 1.52 +/- 0.13 or per kg egg mass; 2.02 +/- 0.22) was noted in the birds which were fed on corn during the moult. Maximum egg weight (65.38 +/- 6.18) and feed consumption (743.24 +/- 30.50) was recorded in the birds which offered ration No. 3 during the moult.
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