论文部分内容阅读
塘底是鱼类致病菌和寄生虫的温床,利用药物除野和消灭病原体是提高养殖鱼类成活率的重要措施之一。目前生产上比较常用的有生石灰、漂白粉、茶粕、巴豆和鱼藤精等,特别是生石灰清塘是普遍采用的最有效方法,现将其使用原理和方法介绍如下: 一、使用原理:生石灰的有效成份是氧化钙(CaO),为白色块状物,利用它遇水后发生化学反应放出大量热能,产生氢氧化钙,在短时间内使水的PH值迅速提高到11以上,以杀灭野杂鱼类和鱼类敌害生物及病原体。二、用法与用量:生石灰清塘可分为于塘清塘和带水清塘两种。干塘清塘是先将池水排至5～10厘米,在池底四周挖几个小坑,将生石灰倒
The bottom of the pond is a hotbed of fish pathogens and parasites. The use of drugs to remove wild and eliminate pathogens is one of the important measures to improve the survival rate of farmed fish. Currently more commonly used in the production of lime, bleaching powder, tea meal, croton and rotenone and so on, especially the quick cleaning lime pond is the most commonly used method is the use of its principles and methods are described below: First, the use of principles: quicklime The active ingredient is calcium oxide (CaO), is a white lumps, the use of its chemical reaction after release of water with a lot of heat to produce calcium hydroxide, in a short period of time so that the water rapidly increased to 11 PH value to kill Off wild trash fish and fish enemy organisms and pathogens. Second, usage and dosage: Lime clear ponds can be divided into two ponds and clear ponds. Dry pond clear pond is the first row of water to 5 to 10 cm, digging a few small pits around the bottom of the pool, the lime down