Effects of Different Molecular Weights of Chitosan on Growth Performance, Lipid Metabolism, Slaughter Performance and Meat Quality of Yellow-Feather Broilers
HE Xueping1, CHEN Jingwen2, WANG Runlian1,2, DU Bingwang2, LIANG Cuiping3, WANG Zhongyan3, LIU Guoqing2
1. Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, China;
2. Department of Animal Science, Guangdong Ocean University, Zhanjiang 524088, China;
3. Guangzhou Applon Technology Co., Ltd., Guangzhou 510310, China
Abstract：This study was conducted to investigate the effects of different molecular weights of chitosan on growth performance, lipid metabolism, slaughter performance and meat quality of yellow-feather broilers. A Single factor complete random design was adopted, and a total of 320 twenty-eight-day-old female Xing-Guang-Huang chickens (fast yellow-feather broilers) were randomly divided into 5 groups with 8 replicates per group and 8 birds per replicate. Broilers in each group were fed a basal diet (control group) and experimental diets which supplemented with different molecular weights (600, 1 117, 2 374 and 3 600 u) chitosan, respectively. The experiment lasted for 28 days. The results showed as follows:1) there were no significant differences in the average daily gain, average daily feed intake and feed to gain ratio among all groups (P>0.05). 2) There were no significant differences in the metabolic rates of dry matter and ash among all groups (P>0.05). Chitosan supplementation had a tendency to increase the crude protein metabolic rate (P=0.086). 3) There were no significant differences in the contents of nonesterified fatty acid and low density lipoprotein cholesterol in serum among all groups (P>0.05). Chitosan supplementation had a tendency to reduce the contents of triglycerides and total cholesterol in serum (P=0.087 and P=0.077), and the serum high density lipoprotein cholesterol content of 3 600 u chitosan group was significantly lower than that of other groups (P<0.05). 4) There were no significant differences in the dressed rate, half eviscerated rate, all eviscerated rate, breast muscle rate and leg muscle rate among all groups (P>0.05). 5) There were no significant differences in the pH, meat color, shear force and contents of dry matter, crude protein and total amino acid in breast muscle among all groups (P>0.05). The drip loss in breast muscle of 2 374 and 3 600 u chitosan groups was significantly lower than that of the control group (P<0.05), and the contents of ether extract and inosine monophosphate in breast muscle were tended to lowest and highest in 2 374 u chitosan group (P=0.091 and P=0.076). In conclusion, dietary different molecular weights of chitosan have no significant effects on growth performance and slaughter performance of yellow-feather broilers, but have obvious effects on lipid metabolism and meat quality. Dietary supplemented the chitosan with molecular weight of 3 600 u can significantly decrease the ether extract metabolic rate; dietary supplemented the chitosan with molecular weight of 2 374 and 3 600 u can decrease the serum fat level, decrease the drip loss in breast muscle, and improve the meat quality.
何雪萍, 陈静文, 王润莲, 杜炳旺, 梁翠萍, 汪忠艳, 刘国清. 不同分子质量壳聚糖对黄羽肉鸡生长性能、脂质代谢、屠宰性能及肉品质的影响[J]. 动物营养学报, 2020, 32(7): 3154-3161.
HE Xueping, CHEN Jingwen, WANG Runlian, DU Bingwang, LIANG Cuiping, WANG Zhongyan, LIU Guoqing. Effects of Different Molecular Weights of Chitosan on Growth Performance, Lipid Metabolism, Slaughter Performance and Meat Quality of Yellow-Feather Broilers. Chinese Journal of Animal Nutrition, 2020, 32(7): 3154-3161.
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