构树青贮饲料对肉牛血液生化指标、生长性能、肉中氨基酸及脂肪酸组成的影响
Effect of Broussonetia papyrifera L. silage on blood biochemical parameters, growth performance, meat amino acids and fatty acids compositions in beef cattle.
作者信息
Tao Hui, Si Bingwen, Xu Wencai, Tu Yan, Diao Qiyu
机构信息
Feed Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Feed Biotechnology of the Ministry of Agriculture, Beijing 10081, China.
National Engineering Research Center of Biological Feed, Beijing 10081, China.
出版信息
Asian-Australas J Anim Sci. 2020 May;33(5):732-741. doi: 10.5713/ajas.19.0150. Epub 2019 Oct 21.
OBJECTIVE
The study was conducted to investigate the effects of Broussonetia papyrifera L.(B. papyrifera) silage on growth performance, serum biochemical parameters, meat quality, and meat amino acids and fatty acids compositions in beef cattle.
METHODS
Sixty-four male Angus beef cattle were assigned to 4 groups with 4 pens in each group and 4 beef cattle in each pen, and fed with the total mixed ration supplemented with 0%, 5%, 10%, or 15% B. papyrifera silage for 100 days (control group, 5% group, 10% group and 15% group) separately.
RESULTS
Beef cattle had significantly higher final body weight (BW) in 15% group, higher average daily gain (ADG) and dry matter intake (DMI) in 5% group, 10% group and 15% group, and higher feed conversion ratio (FCR) in 10% group and 15% group. Significantly higher blood superoxide dismutase (SOD) concentration was noted in 15% group, higher blood total antioxidant capacity (TAC) in 10% group and 15% group, lower 8-hydroxydeoxyguanosine (8-OHdG) and malondialdehyde (MDA) in 15% group. Meat had lower pH in 15% group, higher Commission International DeI'Eclairage (CIE) L* in 5% group, 10% group, and 15% group, and lower drip loss in 15% group. Greater concentration of meat polyunsaturated fatty acids (PUFA) was observed in 10% group and 15% group, and docosahexaenoic acid (DHA) in 15% group.
CONCLUSION
Diet with 15% B. papyrifera silage could improve performance and increase final BW, ADG, DMI, and FCR, enhance the antioxidant functions by decreasing blood 8-OHdG and MDA and increasing blood SOD and TAC, improve the meat quality by lowing pH and drip loss and increasing CIE L*, increase the meat PUFA and DHA concentration. Polyphenols and flavonoids might be the main components responsible for the antioxidant activity and anti-biohydrogenation in the B. papyrifera silage. And B. papyrifera silage could be used as a new feedstuff in beef cattle nutrition.
目的
本研究旨在探讨构树青贮饲料对肉牛生长性能、血清生化指标、肉质以及肉中氨基酸和脂肪酸组成的影响。
方法
将64头雄性安格斯肉牛分为4组，每组4个栏位，每个栏位4头牛，分别用添加0%、5%、10%或15%构树青贮饲料的全混合日粮喂养100天（对照组、5%组、10%组和15%组）。
结果
15%组肉牛的末体重显著更高，5%组、10%组和15%组的平均日增重（ADG）和干物质采食量（DMI）更高，10%组和15%组的饲料转化率（FCR）更高。15%组血液中超氧化物歧化酶（SOD）浓度显著更高，10%组和15%组血液中总抗氧化能力（TAC）更高，15%组8-羟基脱氧鸟苷（8-OHdG）和丙二醛（MDA）更低。15%组肉的pH值更低，5%组、10%组和15%组肉的国际照明委员会（CIE）L*值更高，15%组肉的滴水损失更低。10%组和15%组肉中多不饱和脂肪酸（PUFA）浓度更高，15%组肉中二十二碳六烯酸（DHA）含量更高。
结论
日粮中添加15%构树青贮饲料可提高生产性能，增加末体重、ADG、DMI和FCR，通过降低血液中8-OHdG和MDA含量以及提高血液中SOD和TAC水平增强抗氧化功能，通过降低pH值和滴水损失以及提高CIE L*值改善肉质，增加肉中PUFA和DHA浓度。多酚和黄酮类化合物可能是构树青贮饲料中抗氧化活性和抗生物氢化作用的主要成分。构树青贮饲料可作为肉牛营养中的一种新型饲料原料。
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