日粮中添加蛋氨酸硒对种公猪繁殖性能的影响

Effect of adding methionine selenium to the diet on the reproductive performance of breeding boars

文章旨在研究日粮添加蛋氨酸硒对种公猪繁殖性能的影响。试验将40头(130±5.13)kg的健康状况良好、配种次数、年龄基本一致、正在使用的杜洛克种公猪随机分为4组,每组10个重复,每个重复1头种公猪。对照组在基础日粮中添加0.15 mg/kg的亚硒酸钠,试验组Ⅰ、Ⅱ、Ⅲ、Ⅳ分别在基础日粮中添加0.15、0.25、0.35和0.45 mg/kg的蛋氨酸硒,预饲期7 d,正试期60 d。试验结果表明,(1)在种公猪初始体重和睾丸初始体积指数无显著差异的前提下,与对照组相比,日粮中添加蛋氨酸硒对种公猪的生长性能指标(试验末重、ADG、ADFI、F/G和睾丸末体积指数)无显著影响(P> 0.05);(2)与对照组相比,日粮中添加蛋氨酸硒对种公猪射精开始时间无显著影响(P> 0.05),但显著提高了种公猪的射精持续时间、精液量、精子密度和精子活率(P <0.05),且显著降低了精子畸形率(P <0.05),尤以日粮中添加0.25 mg/kg的蛋氨酸硒组的精子活率最高,精子畸形率最低,除此之外,日粮中添加0.25、0.35和0.45 mg/kg蛋氨酸硒的精子活力显著高于对照组和试验Ⅰ组(P <0.05);(3)日粮中添加蛋氨酸硒显著提高了种公猪精子中SOD、GSH-Px活性、T-AOC含量(P <0.05),显著降低了精子中MDA的含量,且各试验组间无显著差异(P <0.05)。综合试验测定指标,日粮中添加蛋氨酸硒可以提高精子的抗氧化能力和精液品质,从而提高种公猪的繁殖性能,且以日粮中添加0.25 mg/kg蛋氨酸硒的效果最佳。

This study aims to investigate the effect of adding methionine selenium to the diet on the reproductive performance of breeding boars.Select 40 healthy Duroc boars with a weight of(130±5.13)kg and similar mating times and age,who are currently in use.Randomly divide them into 4 groups,with 10 replicates in each group,and 1 boar in each replicate.The control group was fed with a basal diet supplemented with 0.15mg/kg of sodium selenite,while the experimental groups I,II,III,and IV were fed with 0.15,0.25,0.35,and 0.45 mg/kg of methionine selenium on top of the basal diet.The preliminary trial period was 7 days,and the formal trial period was 60 days.The experimental results showed that:(1)compared with the control group,the addition of methionine selenium in the diet had no significant effect on the growth performance indicators(experimental end weight,ADG,ADFI,F/G,and testicular end volume index)of the breeding boars,provided that there was no difference in the initial body weight and testicular initial volume index of the breeding boars(P>0.05);(2)Compared with the control group,the addition of methionine selenium in the diet had no significant effect on the onset time of ejaculation in breeding boars(P>0.05),but significantly increased the duration of ejaculation,semen volume,sperm density,and sperm motility(P<0.05),and significantly reduced the sperm deformity rate(P<0.05).Especially,the group supplemented with 0.25mg/kg methionine selenium in the diet had the highest sperm motility rate and the lowest sperm deformity rate,In addition,the sperm motility of the diet supplemented with 0.25,0.35,and 0.45mg/kg methionine selenium was significantly higher than that of the control group and experimental group I(P<0.05);(3)The addition of methionine selenium in the diet significantly increased the SOD activity,T-AOC,and GSH-Px content in the sperm of breeding boars(P<0.05),and significantly reduced the MDA content in the sperm.There was no significant difference between the experimental groups(P<0.05).According to the comprehensive experimental measurement indicators,adding methionine selenium to the diet can improve the antioxidant capacity of sperm and semen quality,thereby improving the reproductive performance of breeding boars.The best effect is to add 0.25 mg/kg methionine selenium to the diet.