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一、泛塘的高峰季节:泛塘在我区的养鱼季节(5～9月)里都可能发生,但主要集中在7～8月份。笔者1986～1990年期间的统计数字表明,7、8两月是泛塘的高峰季节,占泛塘总数的72.8%,并且损失大,其他季节泛塘所占比例只有27.2%,经济损失相对较小。二、泛塘原因分析:调查发现,5月份的泛塘主要是出现在越冬池,秋放鱼池也有发生。5月初是水体浮游植物处于冬春交替阶段,水体产氧能力并不很强,而此时气温、水温已开始回升,有机物、水生动
First, Pan Tong peak season: Pan Tong fish in my area during the season (May to September) may occur, but mainly concentrated in July and August. The statistics of the author from 1986 to 1990 show that in July and August, it was the peak season of Pan Tong, accounting for 72.8% of the total number of Pan Tong, and the loss was large. The share of Pan Tong in other seasons was only 27.2%, and the economic loss was relatively small. Second, Pan Tong Analysis: The survey found that Pan Tong in May was mainly in the winter pool, autumn fish ponds have also occurred. At the beginning of May, the phytoplankton in the water is in an alternating stage of winter and spring, and the oxygen production capacity of the water body is not very strong. At this time, the temperature and water temperature have begun to rise, and the organic matter and water are vivid