Effects of fermented feed on growth performance and economic benefit of broilers.

The purpose of this experiment was to study the effects of fermented feed on the growth performance, meat quality, and economic benefits of broilers. A total of 1 600 AA broilers were divided into four groups with four replicates in each group and 100 broilers in each replicate. The control group was fed with basal diet, and the experimental group was fed with 2.5%, 5.0%, and 10.0% fermented feed, respectively. The trial period was 42 days. The results showed that from 22 to 42 days old, body weight, average daily gain, and average daily feed intake of 5.0% group and 10.0% group at 42 days of age were significantly increased (P<0.05), and the ratio of feed to gain was significantly decreased (P<0.05). From 1 to 42 days old, the average daily gain and average daily feed intake of 5.0% group and 10.0% group increased significantly (P<0.05), and the feed to gain ratio decreased significantly (P<0.05). The pH24 h value, L* value, b* value, and cooking loss of muscle in 5.0% group and 10.0% group decreased significantly (P<0.05). Shear stress in of muscle in 2.5% group, 5.0% group and 10.0% group decreased significantly (P<0.05). The contentrations of glycine and inosinic acid in muscle of 5.0% group and 10.0% group increased significantly (P<0.05). Compared with the control group, the weight gain of 2.5% group, 5.0% group, and 10.0% group increased by 2.55%, 8.74%, and 12.26%, respectively, and the breeding profit increased by 2.69%, 11.73%, and 13.15%, respectively. The study indicates that broilers fed proper amount of fermented feed can improve growth performance, meat quality, and breeding profit, and it is more suitable to feed 5%~10% fermented feed. [ABSTRACT FROM AUTHOR]