论文部分内容阅读
1.发生时间氨氮中毒多发生在连续晴天,并多在午后。池鱼药害多与农田施药、鱼池施肥和工厂排污有关,在作物的生长季节、病虫害流行期间和鱼病流行期间较为严重,死鱼现象不分白天、夜晚都可发生。而泛塘死鱼多发生在夏季高温季节,特别是在连续低气压闷热天气、连绵阴雨天气最容易发生,并多发生在半夜到清晨这段时间里。泛塘与水质肥瘦、池鱼密度有关,水越肥鱼越密,则泛塘程度也越重。
1. Time of occurrence Ammonia nitrogen poisoning occurred in continuous sunny days, and more in the afternoon. Ikebukuro and more pesticide application of farmland, fish ponds and sewage treatment plant emissions in the growing season of crops, pests and epidemics during the epidemic of fish disease is more serious, dead fish regardless of day and night can occur. The Pan Tong dead fish occurred in the hot summer season, especially in the continuous low-pressure hot weather, the most prone to rainy weather, and occurs in the middle of the night to early morning during this period. Pan Tong and water quality fat, the density of fish ponds, the more dense the water more fat fish, the Pan Tong extent heavier.