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试验目的是研究草鱼摄入枯草芽孢后,对草鱼的生长、免疫指标的影响,以及通过粪便排出的枯草芽孢对水质的影响。1试验材料试验鱼为草鱼,在暂养池(2×1.2×1m3)中投喂商品饲料驯化10d后,挑选体表无损伤、大小基本一致的健康草鱼进行试验。测定鱼初始体重。试验饲料由通威集团提供。2试验设计试验采用单因素梯度试验法,分为3个组,分别为添加了1亿/g和1千万/g的试验饲料为试验组,最后饲料中芽孢的含量为2800万/g和
The purpose of the experiment was to investigate the effects of subtilis spores on the growth of grass carp and the immune parameters of the grass carp, and the effects of subtilis spores excreted through the feces on the water quality. 1 Test material The test fish was grass carp. After domesticated feed (2 × 1.2 × 1m3) was domesticated for 10 days, healthy grass carp with no damage on the body surface and basically the same size were selected for testing. The initial body weight of the fish was measured. Test feed provided by Tong Wei Group. 2 Experimental design The test was conducted by single factor gradient test and divided into three groups, which were 100 million / g and 10 million / g respectively. The final feed was spore content of 28 million / g and