摘要
文章旨在研究日粮中添加不同水平杜仲叶提取物对肉牛生长性能、血清生化指标及血清免疫指标的影响。试验选取72头月龄相近,初重为(436.18±25.42)kg的西门塔尔公牛,随机按4组×3重复×6头分组。各组肉牛分别饲喂日粮+0%、0.1%、0.2%、0.3%的杜仲叶提取物。预饲期7d,正试期40d。结果表明:(1)与0%杜仲叶提取物组相比,0.1%杜仲叶提取物组肉牛平均日增重显著提高21.71%(P<0.05),饲料转化率显著降低10.98%(P<0.05)。(2)与0%杜仲叶提取物组相比,0.2%、0.3%杜仲叶提取物组肉牛血清中总蛋白含量显著提高(P<0.05),谷草转氨酶活性显著降低(P<0.05)。(3)与0%杜仲叶提取物组相比,0.1%、0.2%、0.3%杜仲叶提取物组肉牛血清中IgA含量显著提高(P<0.05),0.3%杜仲叶提取物组肉牛血清中IgG含量显著提高(P<0.05),0.2%、0.3%杜仲叶提取物组肉牛血清中肿瘤坏死因子-α含量显著降低(P<0.05)。结论 :日粮添加低水平(0.1%)杜仲叶提取物,肉牛生长性能最佳;日粮添加中高水平(0.2%、0.3%)杜仲叶提取物能提高肉牛血清免疫力。
This experiment aims to investigate the effects of different levels of Eucommia ulmoides leaf extract in the diet on the growth performance,serum biochemical indicators,and serum immune indicators of beef cattle.72 Simmental bulls of similar age with an initial weight of(436.18±25.42)kg were selected and randomly divided into 4 groups×3 replicates×6 heads.Each group of beef cattle is fed diet+0%,0.1%,0.2%,and 0.3%of Eucommia ulmoides leaf extract are added to the diet,respectively.The pre trial period is 7 days,and the main trial period is 40 days.The Results:(1)Compared with the 0%Eucommia ulmoides leaf extract group,the 0.1%Eucommia ulmoides leaf extract group significantly increased the average daily weight gain of beef cattle by 21.71%(P<0.05),and the feed conversion rate significantly decreased by 10.98%(P<0.05).(2)Compared with the 0%Eucommia ulmoides leaf extract group,the total protein content in beef cattle serum was significantly increased(P<0.05)in the 0.2%and 0.3%Eucommia ulmoides leaf extract groups,while the activity of aspartate aminotransferase was significantly reduced(P<0.05).(3)Compared with the 0%Eucommia ulmoides leaf extract group,the 0.1%,0.2%,and 0.3%Eucommia ulmoides leaf extract groups significantly increased the IgA content in beef cattle serum(P<0.05),the 0.3%Eucommia ulmoides leaf extract group significantly increased the IgG content in beef cattle serum(P<0.05),and the 0.2%and 0.3%Eucommia ulmoides leaf extract groups had tumor necrosis factor in beef cattle serum-αThe content significantly decreased(P<0.05).Conclusion:Adding low levels(0.1%)of Eucommia ulmoides leaf extract to the diet resulted in the best growth performance for beef cattle;Adding medium to high levels(0.2%,0.3%)of Eucommia ulmoides leaf extract to the diet can improve the serum immunity of beef cattle.
作者
张莉
李勇生
牛琼
赵雯
梁斌
ZHANG Li;LI Yongsheng;NIU Qiong;ZHAO Wen;LIANG Bin(Gansu Provincial Center for Animal Disease Control and Prevention,Lanzhou,Gansu Province 730046,China)
出处
《中国饲料》
北大核心
2024年第16期61-64,共4页
China Feed
基金
2023年省级现代寒旱农业发展资金计划项目(GNKJ-2023-16)。
关键词
杜仲叶提取物
肉牛
生长性能
血清生化指标
血清免疫指标
Eucommia ulmoides leaf extract
beef cattle
growth performance
serum biochemical indicators
serum immune indicators
