论文部分内容阅读
在农村养鱼的生产中,有的养鱼户往往只注重细菌性和病毒性鱼病的防治,忽视了植物性敌害对鱼类的危害。今年夏天四川省长宁县铜锣乡一养鱼户,因植物性敌害(湖靛)的危害,六天时间死掉鱼类价值达千元。这里介绍几种植物性敌害的防治措施。一、湖靛的防治。湖靛是由许多球形小细胞组成的群体,是蓝藻中的微囊藻,这种藻类在天气炎热时大量繁殖,呈翠绿色飘于水面,鱼类吃了不能消
In the production of fish farming in rural areas, some fish farmers tend to focus only on the prevention and control of bacterial and viral fish diseases and neglect the hazards of plant-based predators on fish. This summer, a fish farmer in Tongluo Township, Changning County, Sichuan Province, died of fish worth sixty thousand yuan for six days because of the damage caused by the plant enemy predation (lake indigo). Here are some kinds of plant predators control measures. First, the prevention and treatment of the lake. Lake is a small group of spherical cells composed of small groups of cyanobacteria in the microcystis, the algae in the hot weather when a large number of breeding, was emerald green floating on the surface, the fish ate can not eliminate