牛至香酚(净力安)对草鱼生长性能的影响

Effect of Biocyanol on Growth Performance of Grass Carp

试验采用单因素对比试验设计,分为4组,每组3个重复,其中Ⅰ组为对照组,饲养面积为20 000 m^2,日粮中不添加"净力安",Ⅱ、Ⅲ、Ⅳ组为试验组,每个试验组饲养面积为26 667 m^2,日粮中"净力安"的添加量分别为150、200、250 mg·kg^(-1)。试验所用草鱼平均体重约为0.76 g,试验用鱼塘面积共计10万m^2,4组饲养密度相同,即草鱼6尾·m^2。试验结果表明,"净力安"能够提高草鱼的成活率,其中Ⅱ、Ⅲ、Ⅳ组成活率分别提高15.83%、23.82%、24.33%,且差异显著(P<0.05);提高草鱼的特定生长率,其中Ⅱ、Ⅲ、Ⅳ组特定生长率分别提高0.13、0.29、0.30%·d^(-1),且差异显著(P<0.05);降低草鱼的饵料系数,其中Ⅱ、Ⅲ、Ⅳ组饵料系数分别降低0.09、0.16、0.17,且差异显著(P<0.05),"净力安"在草鱼中的最佳添加水平为200 g·t^(-1)。

This study adopted the design of single factor experiments, was divided into four groups, each group of three repeat, including Ⅰ group as the control group, the breeding area of 20 000 m2, diet don't add "net force",Ⅱ,Ⅲ,Ⅳ group as experimental group, each group breeding area of 26 667 m2, diet "net force","net force" 150, 200 and 250 mg·kg^-1. The average weight of grass carps used in the experiment was about 0.76 g. The area of the fishpond used in the experiment was 100 000 m2, and the feeding density of the four groups was the same, that is, grass carps with 6· tails·m2 -1. The experimental results showed that:"the net force" can enhance the survival rate of the grass carp, which Ⅱ,Ⅲ,Ⅳ group survival rate increased by 15.83%, 23.82% and 24.33% respectively, and a significant difference (P< 0.05);improve the specific growth rate of grass carp, which Ⅱ,Ⅲ,Ⅳ group of specific growth rate were increased by 0.13, 0.29, 0.30 %·d^-1, and significant difference (P<0.05);reduce the bait coefficient of grass carp, which Ⅱ,Ⅲ,Ⅳ group 0.09, 0.16, 0.17, bait coefficient, and a significant difference (P<0.05). The optimal addition level of "net force" in grass carp is 200 g·t^-1.