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1991年我场从省农科院购进一批鱼用稀土,在440亩鱼苗池中随机抽样188.2亩进行了稀土养殖鱼苗试验,根据对比试验结果统计:鱼苗池使用稀土后,亩均产量272.3公斤,比对照池增产23％;草鱼产量74.5公斤,比对照池增产48％;草鱼成活率70.4％,比对照池提高了19.6个百分点。一年来的对比试验证明,适当浓度的稀土可以抑制病菌的生长和繁殖,促进鱼类的生长,增强鱼的抗逆性,刺激鱼的食欲,促进鱼的消化。因此,对鱼类有明显的防病促长效果,特别是对草鱼的赤皮、肠炎和烂鳃鱼病有明显的防治效果。稀土养殖鱼苗的方法是:①每包净重40克的
In 1991, I purchased a batch of rare earths from the Provincial Academy of Agricultural Sciences, and randomly sampled 188.2 mu of 440-mu fry ponds to test the rare-earth fish fry. According to the comparison test results, after using rare earths in fry ponds, the output per mu reached 272.3 Kg, yield 23% more than the control pond; grass carp yield 74.5 kg, 48% more yield than the control pond; grass carp survival rate of 70.4%, 19.6 percentage points higher than the control pond. A year of comparative tests show that the appropriate concentration of rare earth can inhibit the growth and reproduction of bacteria, promote fish growth, enhance fish resistance, stimulate fish appetite and promote fish digestion. Therefore, there is a significant anti-pathogenic effect on fish growth, especially for the grass carp red skin, enteritis and rot gill disease have significant control effect. Rare fish farming methods are: ① 40 grams per bag net weight