一龄草鱼种,由于抗病力弱,常发生细菌性烂鳃病、肠炎病、赤皮病与病毒性出血病,成活率很低,甚至全部死亡,故渔谚云:“草鱼不瘟,富得发昏”。常见的预防方法是人工注射疫苗。可是这种方法麻烦,特别是有的草鱼种,到了六七月,体长6—7厘米左右,就开始发病,人工注射疫苗不仅困难,而且不起作用。这里介绍一种浸泡免疫增效的方法,供大家试验推广。这个方法最好于5、6月间,结合草鱼夏花(体长3厘米左右)分池饲养时进行。做法是用运鱼苗用的尼龙袋1个,灌入无毒清水4升(4000毫升,相当4000克),草鱼人工疫苗(土法疫苗或出血病灭活疫苗)40毫升(浓度最好是1∶10),价格1.2元),盐酸山莨菪碱(盐酸654—2)注射液4支(含药40毫克,价格0.3元),也可用价格更低的山莨菪碱(654—2)片剂代替,充氧密封,浸泡3 First-age grass carp species, due to weak resistance, often bacterial gill disease, enteritis, red skin disease and viral hemorrhagic disease, the survival rate is very low, and even all died, so fishing saying goes: “Grass carp is not plague, Rich enough to faint. ” The most common way to prevent this is by injecting a vaccine. However, this method is troublesome. In particular, some grass carp species arrive in June and July with a body length of about 6-7 cm. The onset of the disease is not only difficult but also ineffective. Here to introduce a method of soaking immune synergy, for everyone to test the promotion. This method is best in May and June, with grass carp summer flowers (body length of about 3 cm) pool rearing. The practice is to use a bag of nylon bags to carry fry, pour 4 liters of non-toxic water (4000 ml, equivalent to 4000 g), grass carp artificial vaccine (indigenous vaccine or hemorrhagic inactivated vaccine) 40 ml (the concentration is preferably 1 : Price of 1.2 yuan), anisodamine hydrochloride (hydrochloric acid 654-2) injection 4 (containing 40 mg, the price of 0.3 yuan), also available lower prices of anisodamine (654-2) tablets Instead, oxygenated seal, soaked 3