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一、先养水后治虫 池塘主养鳜鱼放养密度高,鱼体生长较快,排泄物日益增多,水体中氨氮等有害物升高,同时患有寄生虫危害情况下,处理二者方法,应先调节养好水为先,水是鱼儿健康生存的先决条件,如果水质条件不良情况下,贸然先治虫产生的结果是加速水体恶化的严重后果,造成负面不良影响。治水方法采用:一是应用底质改良剂;二是微生物制剂降解氨氮、亚硝基氮;三是外部水体新鲜良好的条件下适量加注新水,水温内外相差不得超过3℃;四是中午开动增氧机2—3小时调节上下池水。待池水氨氮短时间内降低到0.5ppm以内,再针对寄生虫选用以中草药为主的高效、低残留的杀虫药物杀灭鱼体寄生虫。
First, watering the pest ponds Main mullet stocking density, rapid growth of fish, increasing excretion of water, ammonia and other harmful substances in the water increased at the same time suffering from parasitic hazards, the two methods, Should first adjust the water to keep good for the first, water is a prerequisite for the healthy survival of fish, if the water quality and adverse conditions, the first rush to kill pests produce the result is to accelerate the serious consequences of deteriorating water, resulting in negative adverse effects. Second, microbial degradation of ammonia nitrogen, nitroso nitrogen; Third, external water fresh good conditions, the amount of new water, water temperature difference between inside and outside shall not exceed 3 ℃; Fourth, noon Start aeration machine 2-3 hours to adjust the upper and lower pool water. Ammonia to be treated in a short period of time to reduce the water to 0.5ppm or less, and then for the parasite selection of Chinese herbal medicine-based high efficiency, low residual pesticides to kill fish parasites.