Feed Restriction Influences Growth Performance and Blood Glucose in Faster- and Slower- Growing Chickens
Feed Restriction Influences Growth Performance and Blood Glucose in Faster- and Slower- Growing Chickens
Ziyue Qin1, Zhen Wang1, Ali Mujtaba Shah3,4, Zifan Ning1, Yaofu Tian1, Qing Zhu1, Yan Wang1, Huadong Yin1, Zhichao Zhang1, Lu Zhang1, Lin Ye1, Diyan Li1, Gang Shu2 and Xiaoling Zhao1,*
ABSTRACT
Feed restriction during the growing period is a common practice in husbandry to limit body weight gain during the grower period in broiler breeders. However, whether the chickens with different genetic background have the same response to feed restriction is not reported, herein we evaluated three levels of feed restriction effects on growth performance and blood glucose concentrations in faster- and slower- growing chicken (different genotypes). In the present study, birds were restricted to 100% to full feed in faster- and slower- growing broilers groups. Body weight gain, feed consumption, blood glucose concentrations were measured on each week from d 1 per 70, and the weight gain of skeletal muscle and viscera were measured on d 7, 28, 49 and 70. The daily voluntary intake of feed was recorded and designed as a 100% diet amount (full feed). Genotype affected body weight, feed consumption, weights gain of breast muscle, leg muscle and liver (p < 0.05). Feed restriction also affected body weight gain, feed consumption, and leg muscle weight (p < 0.05). In faster- growing stock, chickens with full feed were heavier, but their leg muscles were lighter than 80% feed group, and there was a compensatory growth for the 80% feed group on d 49 and 70. The blood glucose on d 7 was higher in slower- growing group than the faster- growing group. Results also showed there was a high negative correlation between blood glucose with body weight and feed consumption in both genotypes. Generally, feed restriction affected body weight and leg muscle weight but did not influence blood glucose in the faster- and slower- growing broilers. Moreover, though 80% feed restriction reduced body weight gain on d 49 in faster- growing chickens, it promoted leg muscle weight.
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February 2022
Vol. 54, Iss. 1, Pages 1-501
