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Effect of Choice Feeding on Performance, Gastrointestinal Development and Feed Utilization of Broilers
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Effect of Choice Feeding on Performance, Gastrointestinal Development and Feed Utilization of Broilers
Yao, Junhu; Tian, Xiaoyan; Xi, Haibo; Han, Jincheng; Xu, Ming; Wu, Xiaobing;
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The experiment was conducted to study the effect of choice feeding on growth performance, carcass quality, gastrointestinal development and feed utilization of 22-49 days old broilers. One hundred and forty four 22-day-old broilers were randomly allocated to 3 treatments with 4 replicates per treatment and 12 birds per replicate. Three feeding regimes are complete diet (control), ground corn and protein concentrate (treatment I), and soybean meal and balancer (treatment II). Protein concentrate is the residue part of complete diet without corn, and balancer is the residue part of complete diet without soybean meal. Treatment I and II are designed for the broilers to freely choose the two parts of diet. The results showed that: (1) broilers under choice feeding (treatment I and II) had lower performances compared with the control; (2) gastrointestinal development and the efficiency ratios that broilers converted dietary crude protein and lysine to body weight gain were improved in treatment I (p<0.05); (3) there were no significant differences in the apparent metabolizabilities of dietary dry matter, crude protein and gross energy, and deposition ratios of dietary nitrogen and energy, and carcass quality among three feeding regimes (p>0.05).
Choice Feeding;Broiler;Performance;Nutrient Utilization;Gastrointestinal Development;
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