日粮添加枣渣对肉牛血液指标及经济效益的影响

Effect of adding date residue to diet on blood indicators and economic benefits of beef cattle

文章旨在研究日粮添加枣渣对肉牛血液指标及经济效益的影响。试验选择安格斯阉牛48头,随机分成4组,各组肉牛日粮分别添加0%(Ⅰ组)、3%(Ⅱ组)、6%(Ⅲ组)、9%(Ⅳ组)的枣渣,每组12个重复,每个重复1头牛,试验为期60 d。结果表明:(1)各组间肉牛血液生化指标无显著差异(P>0.05)。对肉牛血液抗氧化指标来说,Ⅱ、Ⅲ组超氧化物歧化酶活性显著高于Ⅰ和Ⅳ组(P<0.05),同时,Ⅲ组超氧化物歧化酶活性显著高于Ⅱ组(P<0.05),Ⅰ和Ⅳ组超氧化物歧化酶活性无显著差异(P>0.05);各组间总抗氧化能力、丙二醛、谷胱甘肽过氧化物水平无显著差异(P>0.05),但总抗氧化能力水平随枣渣添加量的增加呈上升趋势。(2)与Ⅰ组相比,Ⅲ、Ⅳ组肉牛平均日增重分别提高16.54%、12.60%(P<0.05);Ⅲ、Ⅳ组肉牛平均日干物质采食量分别提高3.45%、3.86%(P<0.05);Ⅱ、Ⅲ、Ⅳ组肉牛料重比分别降低6.57%、11.34%、7.86%(P<0.05)。与Ⅰ组相比,Ⅱ、Ⅲ、Ⅳ组肉牛平均日育肥收益分别增加3.12、6.15、4.26元,增长比例依次为16.36%、32.25%、22.34%。综上所述,在肉牛日粮中添加不同水平枣渣可以有效提升肉牛抗氧化水平、生长性能及经济效益;在本试验中,肉牛日粮添加6%的枣渣可带来最佳的经济效益。

The purpose of the experiment is to study the effect of adding date residue to the diet on the blood index and economic benefits of beef cattle.48 Angus castration cattle were selected and randomly divided into 4 groups.Each group added 0%(Group I),3%(Group II),6%(Group III)and 9%(Group IV)of date residue to the diet.Each group had 12 repetitions,each repeated 1 cow,and the test period was 60d.The results showed that(1)there was no significant difference in the blood biochemical indexes of beef cattle between groups(P>0.05).For the blood antioxidant index of beef cattle,the activity of superoxide dismutase in Group II and III was significantly higher than that of Group I and Group IV(P<0.05),while the activity of Superoxide dismutase in Group III was significantly higher than that of Group II(P<0.05).There was no significant difference in the activity of Superoxide dismutase in Group I and Group IV(P>0.05);There is no significant difference in the total antioxidant capacity,malondialdehyde and glutathione peroxide levels between groups(P>0.05),but the total antioxidant capacity level shows an upward trend with the increase of the addition of jujube residue.(2)Compared with Group I,the average daily weight gain of beef cattle in Group III and Group IV increased by 16.54%and 12.60%(P<0.05);the average daily dry material intake of beef cattle in Group III and Group IV increased by 3.45%and 3.6%(P<0.05)respectively;Group II,Group III and Group IV 6.57%,11.34%and 7.86%respectively(P<0.05).Compared with Group I,the average daily fattening income of beef cattle in Group II,Group III and Group IV increased by 3.12 yuan,6.15 yuan and 4.26 yuan respectively,with an increase ratio of 16.36%,32.25%and 22.34%respectively.To sum up,adding different levels of date residue to beef diet can effectively improve the antioxidant level,growth performance and economic benefits of beef cattle.In this experiment,adding 6%of dates to beef diet can bring the best economic benefits.