1～21日龄岭南黄羽肉仔鸡饲粮硒适宜供给量的研究

发布时间：2018-09-14 12:16

【摘要】：本试验旨在研究饲粮不同硒添加水平对1~21日龄岭南黄羽肉仔鸡生长性能和抗氧化性能的影响,以探讨快大型岭南黄羽肉仔鸡饲养前期的饲粮硒适宜供给量。选用1日龄健康、发育良好的快大型岭南黄羽肉公雏鸡1 200只,根据体重随机分为5个组,每组6个重复,每个重复40只鸡,试验1组(对照组)饲喂基础饲粮(硒水平为0.039 mg/kg),试验2~5组饲粮在基础饲粮中分别添加0.075、0.150、0.225和0.300 mg/kg硒,试验期21 d。结果表明:本试验条件下:1)与对照组相比,饲粮添加0.300 mg/kg硒显著降低1~21日龄岭南黄羽肉仔鸡的末重(P0.05),显著提高料重比(P0.05),且0.300 mg/kg硒添加组的平均日增重显著低于其他各水平硒添加组(P0.05)。2)与对照组相比,饲粮添加0.075和0.150 mg/kg硒显著提高21日龄岭南黄羽肉仔鸡的血浆谷胱甘肽过氧化物酶(GSH-Px)活性(P0.05),饲粮添加0.225和0.300 mg/kg硒显著降低血浆丙二醛(MDA)含量(P0.05)。各水平硒添加组的红细胞GSH-Px活性均显著高于对照组(P0.05)。3)与对照组相比,饲粮添加0.075、0.150和0.225mg/kg硒显著提高21日龄岭南黄羽肉仔鸡的肝脏GSH-Px活性(P0.05),0.075和0.150 mg/kg硒添加组的肝脏MDA含量显著低于对照组和0.300 mg/kg硒添加组(P0.05)。综合考虑,为获得较好生长性能和抗氧化性能,1~21日龄岭南黄羽肉仔鸡饲粮硒适宜添加水平为0.075 mg/kg,基础饲粮中硒水平为0.039 mg/kg,则1~21日龄岭南黄羽肉仔鸡饲粮硒适宜供给量为0.114 mg/kg;以肝脏MDA含量为依据,通过非线性回归分析估测得到1~21日龄岭南黄羽肉仔鸡饲粮硒适宜供给量为0.130 mg/kg。
[Abstract]:The purpose of this study was to study the effects of different dietary selenium levels on growth performance and antioxidant activity of 1-day-old Lingnan yellow feather broilers, and to explore the appropriate dietary selenium supply for fast and large Lingnan yellow feather broilers in the early stage of feeding. 1 200 fast large Lingnan yellow feather male chicks, healthy and well developed, were randomly divided into 5 groups according to their body weight, 6 replicates in each group and 40 chickens in each replica. Group 1 (control group) was fed with basic diet (selenium level was 0.039 mg/kg). In experiment 2, the diets of group 2 were supplemented with 0. 075 (0.150) and 0.300 mg/kg selenium, respectively, for 21 days. The results showed that the ratio of 1 to 1 in this experiment was higher than that in the control group. Dietary supplementation of 0.300 mg/kg selenium significantly decreased the end weight of Lingnan yellow feather broiler (P0.05), significantly increased the feed weight ratio (P0.05), and the average daily gain of the 0.300 mg/kg selenium added group was significantly lower than that of the other levels of selenium addition group (P0.05) compared with the control group. Dietary selenium of 0.075 and 0.150 mg/kg significantly increased plasma glutathione peroxidase (GSH-Px) activity of 21-day-old Lingnan yellow broilers (P0.05), and dietary supplementation of 0.225 and 0.300 mg/kg selenium significantly decreased plasma malondialdehyde (MDA) content (P0.05). The erythrocyte GSH-Px activity of selenium added group was significantly higher than that of control group (P0.05). The liver GSH-Px activity of 21-day-old Lingnan yellow feather broilers was significantly increased by dietary supplementation of 0.075 and 0.150 and 0.225mg/kg selenium (P0.05). The content of MDA in liver of the groups supplemented with 0.075 and 0.150 mg/kg se was significantly lower than that of the control group and 0.300 mg/kg se added group (P0.05). Taking into account, In order to obtain better growth performance and antioxidant activity, the optimum dietary selenium supplementation level was 0.075 mg/kg, for Lingnan Yellow Feather broiler, and 0.039 mg/kg, for Lingnan Yellow Feather broiler at 1 ~ 21 days of age, while 0.114 mg/kg; for Lingnan Yellow Feather broiler at 1 ~ 21 days. Based on the content of MDA in liver, The optimum dietary selenium supply of Lingnan yellow feather broiler was estimated to be 0.130 mg/kg. by nonlinear regression analysis.
【作者单位】：广东省农业科学院动物科学研究所畜禽育种国家重点实验室农业部华南动物营养与饲料重点实验室广东省动物育种与营养公共实验室广东省畜禽育种与营养研究重点实验室;
【基金】：国家肉鸡产业技术体系项目(CARS-42) 国家“十二五”科技支撑计划项目(2014BAD13B02)
【分类号】：S831.5

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