有机铬对热应激肉兔生产性能和免疫功能的影响

发布时间：2018-11-21 15:53

【摘要】：本试验旨在研究不同水平有机铬对热应激肉兔生产性能和免疫功能的影响。将144只35日龄断奶新西兰公兔分为6个处理组,每组24只兔,设6个重复,每个重复4只兔,分别添加0、0.2、0.4、0.8、1.6、3.2 mg/kg有机铬(均以铬计),将环境THI控制在28.9~30.0的兔中度热应激状态,试验期28 d。结果表明:添加0.4、0.8、1.6、3.2 mg/kg有机铬均可显著提高热应激新西兰兔日增重和采食量(P0.05),添加1.6、3.2 mg/kg有机铬可显著提高CD4/CD8比值,而有机铬水平对饲料增重比、IgG含量、CD4细胞含量、CD8细胞含量均无影响(P0.05)。因此,在热应激条件下,有机铬可提高肉兔生产性能和细胞免疫。从生产性能考虑,肉兔中以添加0.4 mg/kg有机铬最佳;若从免疫功能考虑,肉兔中以添加1.6 mg/kg有机铬最佳。
[Abstract]:The purpose of this study was to study the effects of different levels of organic chromium on the performance and immune function of heat stressed meat rabbits. 144 New Zealand male rabbits of 35 days old weaning were divided into 6 treatment groups, 24 rabbits in each group, with 6 replicates and 4 rabbits per replica, supplemented with 0 0. 2 (0. 2), 0. 4, 0. 8 and 1. 6 ~ (2) mg/kg organic chromium (all in chromium). The environmental THI was controlled at 28.9 渭 g / kg for 28 days. The results showed that the daily gain and feed intake of New Zealand rabbits under heat stress were significantly increased by adding 0.4g 0.8g 1.6g mg/kg organic chromium (P0.05), and the ratio of CD4/CD8 was significantly increased by adding 1.60.2mg/kg organic chromium (P 0.05). However, organic chromium level had no effect on feed weight gain ratio, IgG content, CD4 cell content and CD8 cell content (P0.05). Therefore, organic chromium can improve the performance and cellular immunity of meat rabbits under heat stress. In terms of production performance, 0.4 mg/kg organic chromium was the best for meat rabbits, and 1.6 mg/kg organic chromium was the best for immune function.
【作者单位】：四川省畜牧科学研究院动物营养研究所;四川省畜牧科学研究院养兔研究所;
【基金】：四川省畜牧科学研究院基本科研业务费(SASA2013B06) 公益性行业(农业)科研专项经费项目(201303143) 四川省育种攻关项目(2011NZ0099) 四川省科技支撑项目(2016NZ0002)
【分类号】：S829.1

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