生石灰在淡水养殖中常用来杀灭病菌、调节水质等,为保证其使用效果,泼洒生石灰必须注意以下几点:一、注意池塘对象一般精养鱼池,鱼类摄食生长旺盛,经常泼洒生石灰效果较好;新挖鱼池因无底淤,缓冲能力弱,有机物不足,不宜施用生石灰,否则会使有限的有机物加剧分解,肥力进一步下降,更难培肥水质;对于水体 pH 值较低的池塘,要泼洒生石灰加以调节;水体pH 值较高,钙离子过量的池塘,则不宜再施用生石灰,否则会使水中有效磷浓度降低,造成水体缺磷,影响浮游植物的正常生长。二、注意使用剂量用于改良水质或预防鱼病时,生石灰的用量为每0.067公顷水面每米水深13～15千克,治疗鱼病时用量为15～20千克。但对于鲫鱼出血病的治疗,每0.067公顷水面每米水深要用25～30千克,因为用量少了反而会激活毒素加重病情。用药后要观察鱼的反应,以防剂量太大水质突变造成死鱼。另外, Quicklime commonly used in freshwater aquaculture to kill bacteria, regulating water quality, etc., in order to ensure its use effect, spilled lime must note the following: First, pay attention to the general target of intensive pond pond fish, fish feeding vigorous growth, often splash lime effect It is not suitable to apply quick lime, otherwise the limited organic matter will be decomposed and the fertility will drop further, making it more difficult to fertilize the water. For ponds with low pH value, To sprinkle lime to be adjusted; higher pH value of the water, calcium excess pond, it is not appropriate to apply quicklime, otherwise it will reduce the concentration of available phosphorus in water, resulting in phosphorus deficiency in water, affecting the normal growth of phytoplankton. Second, pay attention to the dose used to improve water quality or prevent fish disease, the amount of quicklime per 0.067 hectares of water per meter depth of 13 to 15 kg, the amount of fish for the treatment of 15 to 20 kg. However, for the treatment of bleeding carp, every 0.067 hectares of water per meter depth of water to use 25 to 30 kg, because the amount of less but will activate toxins aggravate the disease. After treatment to observe the response of fish to prevent too much water quality caused by sudden changes in dead fish. In addition,