摘要
文章旨在探究日粮添加维生素E(VE)对肉鸭生长性能、血清抗氧化及屠宰性能的影响.试验将 800 羽肉鸭随机分为 4 组,每组 10 个重复,每重复 20 羽.试验日粮是在基础日粮的基础上分别添加 0、80、160 和 320 mg/kg VE,各试验日粮VE含量实测值分别为 9.8、87.6、171.4 和 331.7 mg/kg.在初重一致的前提下(P＞0.05),160 和320 mg/kg VE添加量组肉鸭的终末体重显著提高 2.24%和 2.82%(P＜0.05);160 和 320 mg/kg VE添加量组肉鸭的平均日增重显著提高 2.29%和 2.89%(P＜0.05);320 mg/kg VE添加量组肉鸭料重比显著降低 3.31%(P＜0.05);此外,VE添加水平对肉鸭采食量无显著影响(P＞0.05).饲料添加320 mg/kg VE可显著提高肉鸭屠宰率(P＜0.05);饲料添加 160 和 320 mg/kg VE显著降低肉鸭腹脂率(P＜0.05);320 mg/kg VE添加量组肉鸭腿肌率显著提高(P＜0.05);此外,VE添加水平对肉鸭半净膛屠宰率、全净膛屠宰率和胸肌率均无显著影响(P＞0.05).160 和320 mg/kg VE添加量组肉鸭血清丙二醛含量显著降低(P＜0.05);160 和 320 mg/kg VE添加量组肉鸭血清总抗氧化能力和总超氧化物歧化酶活性显著提高(P＜0.05);此外,日粮添加VE对肉鸭血清CAT、GSH-Px和Cu-Zn SOD活性均无显著影响(P＞0.05).本试验结果表明,日粮添加 320 mg/kg VE可通过提高肉鸭抗氧化能力提高其生长性能,因此,认为 320 mg为肉鸭日粮最适VE添加量.
Abstract
The aim of this study is to investigate the effects of dietary supplementation of vitamin E on the growth performance,serum antioxidant capacity,and slaughter performance of meat ducks.800 meat ducks were randomly divided into 4 groups,with 10 replicates per group and 20 ducks per replicate.The experimental feed was supplemented with 0,80,160,and 320 mg/kg VE on the basis of the basic feed.The measured VE content in each experimental feed was 9.8,87.6,171.4,and 331.7 mg/kg,respectively.Under the premise of consistent initial weight(P＞0.05),the final weight of meat ducks in the 160 and 320 mg/kg VE addition groups significantly increased by 2.24%and 2.82%(P＜0.05);The average daily weight gain of meat ducks in the 160 and 320 mg/kg VE addition groups significantly increased by 2.29%and 2.89%(P＜0.05);The feed to weight ratio of meat ducks in the 320 mg/kg VE addition group significantly decreased by 3.31%(P＜0.05);In addition,the level of VE addition had no significant effect on the feed intake of meat ducks(P＞0.05).Adding 320 mg/kg VE to feed significantly increased the slaughter rate of meat ducks(P＜0.05);The addition of 160 and 320 mg/kg VE to feed significantly reduced the abdominal fat percentage of meat ducks(P＜0.05);The leg muscle percentage of meat ducks in the 320 mg/kg VE addition group was significantly increased(P＜0.05);In addition,the level of VE addition had no significant effect on the semi clean chamber slaughter rate,full clean chamber slaughter rate,and chest muscle rate of meat ducks(P＞0.05).The levels of serum malondialdehyde in meat ducks with the addition of 160 and 320 mg/kg VE significantly decreased(P＜0.05);The total antioxidant capacity and total superoxide dismutase activity in the serum of meat ducks with the addition of 160 and 320 mg/kg VE were significantly increased(P＜0.05);In addition,the addition of VE to the diet had no significant effect on the serum CAT,GSH Px,and Cu Zn SOD activities of meat ducks(P＞0.05).The results of this experiment indicate that adding 320 mg/kg VE to the diet can improve the growth performance of meat ducks by enhancing their antioxidant capacity.Therefore,320 mg is considered the optimal amount of VE added to the diet of meat ducks.
NETL
NSTL
万方数据