马铃薯皮渣与玉米秸秆混贮对育肥牛生长性能、营养物质表观消化率以及血清生化和抗氧化指标的影响  

Effects of Mixed Silage of Potato Peels and Corn Straw on Growth Performance,Nutrient Apparent Digestibility and Serum Biochemical and Antioxidant Indices of Fattening Cattle

作　　者：李明威 李元晓[1] 王佳佳[1] 宋朱朝 姚捷 云颖 包文龙 孙娟娟[2] 孔庆斌 LI Mingwei;LI Yuanxiao;WANG Jiajia;SONG Zhuchao;YAO Jie;YUN Ying;BAO Wenlong;SUN Juanjuan;KONG Qingbin(Laboratory of Biological Feed and Precision Nutrition,College of Animal Science and Technology,Henan University of Science and Technology,Luoyang 471023,China;Institute of Grassland Research of CAAS,Hohhot 010010,China;Shangdu Liutaitan Beef Cattle Breeding Cooperative,Ulanqab 013457,China)

机构地区：[1]河南科技大学动物科技学院,生物饲料与精准营养实验室,洛阳471023 [2]中国农业科学院草原研究所,呼和浩特010010 [3]商都县六台滩肉牛养殖专业合作社,乌兰察布013457

出　　处：《动物营养学报》2024年第11期7108-7119,共12页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：中央引导地方科技发展资金(2022ZY0098)。

摘　　要：本试验旨在研究马铃薯皮渣与玉米秸秆混合青贮对育肥安格斯公牛生长性能、营养物质表观消化率、血清生化和抗氧化指标以及经济效益的影响。选择36头16月龄体重[(546.75±25.76)kg]和体况相近的安格斯公牛,采用单因素试验设计随机分为3组,每组12头。对照组饲喂以全株玉米青贮为主要粗饲料的基础饲粮(Ⅰ组),2个试验组分别饲喂用马铃薯皮渣与玉米秸秆混合青贮替代基础饲粮中50%(Ⅱ组)和100%(Ⅲ组)全株玉米青贮(干物质基础)的饲粮。预试期7 d,正试期120 d。结果表明:1)各组育肥牛平均日增重和料重比均无显著差异(P>0.05)。与Ⅰ组相比,Ⅱ组和Ⅲ组干物质采食量显著降低(P<0.05)。2)Ⅲ组育肥牛粗脂肪表观消化率显著低于Ⅰ组和Ⅱ组(P<0.05);随着马铃薯皮渣与玉米秸秆混合青贮添加比例的提高,中性洗涤纤维表观消化率有升高的趋势,但各组间差异不显著(P>0.05)。3)与Ⅰ组相比,Ⅱ组育肥牛血清谷丙转氨酶(ALT)活性显著提高(P<0.05),Ⅲ组血清ALT活性极显著提高(P<0.01);Ⅱ组血清葡萄糖(GLU)含量显著提高(P<0.05);Ⅲ组血清尿素氮(UN)和GLU含量均显著提高(P<0.05)。4)随着马铃薯皮渣与玉米秸秆混合青贮添加比例的提高,育肥牛血清超氧化物歧化酶(SOD)活性不断提高,其中Ⅲ组血清SOD活性显著高于Ⅰ组(P<0.05)。5)Ⅲ组养殖收益最高为13.83元/(头·d),分别比Ⅰ组和Ⅱ组提高2.45和1.41元/(头·d)。综上所述,马铃薯皮渣与玉米秸秆混合青贮对育肥安格斯公牛生长性能没有显著影响,但能够提高机体抗氧化能力,并降低饲料成本,提高经济效益,可以用来替代全株玉米青贮。This experiment was conducted to investigate the effects of mixed silage of potato peels and corn straw on growth performance,nutrient apparent digestibility,serum biochemical and antioxidant indices and economic benefits of fattening Angus bulls.Thirty-six 16-month-old Angus bulls with similar body condition and body weight of(546.75±25.76)kg were randomly divided into 3 groups with 12 bulls per group by a single-factor experimental design.The cattle in the control group were fed a basal diet with whole corn silage as the main roughage(group Ⅰ),and the others in the experimental groups were fed the diets with mixed silage of potato peels and corn straw replacing whole corn silage by 50%(group Ⅱ)and 100%(group Ⅲ)(dry matter basis),respectively.The pre-trial period lasted for 7 days and the experimental period lasted for 120 days.The results showed as follows:1)there were no significant differences in the average daily gain and feed to gain ratio of fattening cattle among all groups(P>0.05).Compared with group Ⅰ,the dry matter intake in groups Ⅱ and Ⅲ was significantly decreased(P<0.05).2)The ether extract apparent digestibility of fattening cattle in group Ⅲ was significantly lower than that in groups Ⅰ and Ⅱ(P<0.05);the neutral detergent fiber apparent digestibility was increased with the increase of mixed silage of potato peels and corn straw proportion,but there was no significant difference among all groups(P>0.05).3)Compared with group Ⅰ,the serum alanine aminotransferase(ALT)activity of fattening cattle in group Ⅱ was significantly increased(P<0.05),and the serum ALT activity in group Ⅲ was extremely significantly increased(P<0.01);the serum glucose(GLU)content in group Ⅱ was significantly increased(P<0.05);and the serum contents of urea nitrogen(UN)and GLU in group Ⅲ were significantly increased(P<0.05).4)The superoxide dismutase(SOD)activity in serum of fattening cattle was increased with the increase of mixed silage of potato peels and corn straw proportion,and the SOD activi

关 键 词：马铃薯皮渣 玉米秸秆 育肥牛 生长性能 营养物质表观消化率 抗氧化能力 经济效益 

分 类 号：S816.9[农业科学—饲料科学]