夏季高温条件下饲粮中添加刺梨提取物对皖西白鹅生长性能、脂质代谢及肝脏中热休克蛋白70基因表达的影响

发布时间：2018-11-12 10:47

【摘要】：本试验旨在研究夏季高温条件下饲粮中添加刺梨提取物对皖西白鹅生长性能、脂质代谢及肝脏中热应激蛋白70(HSP70)基因表达的影响。挑选28日龄、体重相近的健康皖西白鹅150只,随机分成3组,即对照组、试验1组和试验2组,每组5个重复,每个重复10只鹅。对照组试验鹅饲喂基础饲粮,试验1组和试验2组试验鹅分别饲喂在基础饲粮中添加100和200 mL/kg刺梨提取物的试验饲粮。预试期7 d,正试期14 d,试验期间最高气温37℃,最低气温24℃,日平均气温31.6℃。饲喂2周后,每个重复挑选1只鹅屠宰,采集血样,并分离出肝脏,测定血清脂质代谢指标和肝脏中HSP70基因的相对表达量。结果表明:饲粮中添加刺梨提取物对皖西白鹅的平均日采食量和平均日增重均无显著影响(P0.05),但添加200 mL/kg刺梨提取物可显著降低料重比(P0.05);饲粮中添加100和200 mL/kg刺梨提取物均可显著提高血清高密度脂蛋白含量(P0.05),但对血清总胆固醇和甘油三酯含量无显著影响(P0.05);与对照组相比,试验1组和试验2组肝脏中HSP70基因的相对表达量均极显著提高(P0.01),同时试验1组肝脏中HSP70基因的相对表达量还极显著高于试验2组(P0.01)。由此得出,在夏季高温条件下,在皖西白鹅饲粮中添加刺梨提取物可提高饲料转化率、调节脂质代谢、上调肝脏中HSP70基因的表达,具有较明显的抗应激效果,且添加量为100 mL/kg时的抗应激效果优于添加量为200 mL/kg时。
[Abstract]:The purpose of this study was to study the effects of the extract of Rosa roxburghii on growth performance, lipid metabolism and heat stress protein 70 (HSP70) gene expression in liver of Wanxi White Goose under high temperature in summer. One hundred and fifty healthy Wanxi white geese of similar weight and 28 days of age were selected and randomly divided into three groups: control group, test group 1 and test group 2 with 5 replicates in each group and 10 geese in each group. The experimental geese in the control group were fed with basic diet, the experimental geese in group 1 and group 2 were fed with 100 and 200 mL/kg extract of Rosa roxburghii in the basal diet, respectively. The maximum temperature was 37 鈩，

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