摘要
本试验旨在探究饲粮中添加单宁提取物对西门塔尔育肥牛生长性能、营养物质表观消化率、血清生化和抗氧化指标的影响。选择膘情正常、体重[(543.13±13.54)kg]相近、健康无病的西门塔尔杂交牛60头,按年龄、体重、膘情、毛色均等的原则随机分为4组,每组15头。对照组(C组)饲喂基础饲粮,试验组(Ⅰ组、Ⅱ组和Ⅲ组)分别在基础饲粮中添加10、20和30 g/(头·d)的单宁提取物。预试期7 d,正试期120 d。结果表明:1)Ⅱ组的平均日增重显著高于C组(P≤0.05),料重比显著低于C组(P≤0.05)。2)第120天时,Ⅲ组的干物质表观消化率显著低于C组(P<0.05),Ⅱ组、Ⅲ组的粗蛋白质表观消化率显著低于C组(P<0.05)。3)第60天时,Ⅰ组、Ⅱ组的血清尿素氮含量显著低于C组(P<0.05)。第120天时,Ⅱ组的血清尿素氮含量显著低于C组(P<0.05),Ⅰ组、Ⅱ组的血清总蛋白含量显著高于C组(P<0.05)。4)第60天时,Ⅰ组、Ⅱ组的血清丙二醛含量显著低于C组(P<0.05),Ⅱ组、Ⅲ组的血清总抗氧化能力显著高于C组(P<0.05)。第120天时,Ⅰ组、Ⅱ组的血清丙二醛含量显著低于C组(P<0.05),Ⅱ组、Ⅲ组的血清谷胱甘肽过氧化物酶活性显著高于C组(P<0.05),Ⅰ组、Ⅱ组、Ⅲ组的血清总抗氧化能力显著高于C组(P<0.05)。综上所述,饲粮中添加单宁提取物可提高西门塔尔育肥牛的生长性能,改善氮代谢和抗氧化性能。本试验条件下,西门塔尔育肥牛饲粮中单宁提取物的适宜添加水平为20 g/(头·d)。
This experiment was conducted to investigate the effects of tannin extract on growth performance,nutrient apparent digestibility,serum biochemical and antioxidant indices of Simmental fattening cattle.Sixty healthy Simmental crossbred cattle with normal fatness and similar body weight[(543.13±13.54)kg]were randomly divided into 4 groups according to the principle of equal age,body weight,fatness and coat color,with 15 cattle in each group.The control group(group C)was fed a basal diet,and the experimental groups(groupⅠ,groupⅡand groupⅢ)were fed the basal diets supplemented with 10,20 and 30 g/(head·d)tannin extract,respectively.The preexperimental period lasted for 7 days,and the experimental period lasted for 120 days.The results showed as follows:1)the average daily gain of groupⅡwas significantly higher than that of group C(P≤0.05),and the ratio of feed to gain was significantly lower than that of group C(P≤0.05).2)On day 120,the dry matter apparent digestibility of groupⅢwas significantly lower than that of group C(P<0.05),and the crude protein apparent digestibility of groupⅡand groupⅢwas significantly lower than that of group C(P<0.05).3)On day 60,the serum urea nitrogen content of groupⅠand groupⅡwas significantly lower than that of group C(P<0.05).On day 120,the serum urea nitrogen content of groupⅡwas significantly lower than that of group C(P<0.05),and the serum total protein content of groupⅠand groupⅡwas significantly higher than that of group C(P<0.05).4)On day 60,the serum malondialdehyde content of groupⅠand groupⅡwas significantly lower than that of group C(P<0.05),and the serum total antioxidant capacity of groupⅡand groupⅢwas significantly higher than that of group C(P<0.05).On day 120,the serum malondialdehyde content of groupⅠand groupⅡwas significantly lower than that of group C(P<0.05),the serum glutathione peroxidase activity of groupⅡand groupⅢwas significantly higher than that of group C(P<0.05),and the serum total antioxidant capacity of groupⅠ,groupⅡand groupⅢwas significantly higher than that of group C(P<0.05).In conclusion,dietary tannin extract can increase the growth performance of Simmental fattening cattle,and improve the nitrogen metabolism and antioxidant performance.Under the conditions of this experiment,the appropriate supplemental level of tannin extract in diet for Simmental fattening cattle is 20 g/(head·d).
作者
张一平
田雨晴
李秋凤
曹玉凤
王明亚
吴春会
白振川
唐春娟
李素霞
ZHANG Yiping;TIAN Yuqing;LI Qiufeng;CAO Yufeng;WANG Mingya;WU Chunhui;BAI Zhenchuan;TANG Chunjuan;LI Suxia(College of Animal Science and Technology,Hebei Agricultural University,Baoding 071033,China;Dingxing Yanyuan Beef Cattle Breeding Co.,Ltd.,Dingxing 072650,China;Guangzhou Shihua Science and Technology Co.,Ltd.,Guangzhou 510812,China;Chengde City Animal Husbandry Station,Chengde 067000,China)
出处
《动物营养学报》
CAS
CSCD
北大核心
2024年第3期1713-1723,共11页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
河北省二期现代农业产业技术体系肉牛创新团队高效养殖岗位建设项目(HBCT2023190203)
优质肉牛产业化生产及智慧化管理技术集成与示范项目(202202F019)。
关键词
单宁提取物
生长性能
抗氧化指标
tannin extract
growth performance
antioxidant indices
