一龄草鱼种培育过程中,因水质、饲料等因素易引发营养性疾病肝胆病。尤其是高密度、以精饲料为主的养殖塘口更易发生此病。近年来有发病重、发病期延长之势,广大养殖户应引起足够重视。症状:患病草鱼种,目检体表无明显症状,极少数病鱼头盖骨下呈微红或暗红色;鳃丝呈紫红色或花 First age grass carp species cultivation process, due to water quality, feed and other factors easily lead to nutritional diseases hepatobiliary disease. In particular, high-density, mainly to concentrate feed ponds more susceptible to the disease. In recent years, the incidence of severe, the incidence of prolonged trend, the majority of farmers should pay enough attention. Symptoms: ill grass carp species, no obvious symptoms in the test body table, a very small number of diseased fish under the cranium was reddish or dark red; gill filaments were purple or flowers