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立秋后天气逐渐凉爽,早、晚气温低,中午气温高,昼夜温差大,秋高气爽的天气适宜蟹虾鱼类快速生长,尤其是河蟹,在这期间还有一次蜕壳,对河蟹的规格、产量、效益均有明显影响。合适的管理措施是取得全年河蟹生产丰收的关键,因此,要特别关注以下管理措施。1.加强水质、水草管理精养蟹虾池塘,由于密度较大,残饵、蟹虾的排泄物等积聚较多,加上刚入秋,水温较高,容易引起水质恶化。故秋季池水应保持较高水位,以提高水体载鱼量和减缓水温、氨氮等水质理化因子的急剧变化。
After the fall of autumn the weather gradually cool, early and late temperatures are low, noon temperature is high, the temperature difference between day and night, autumn weather suitable for rapid growth of crabs and fish, especially crabs, during this period there is a molt, crab specifications, production The benefits have obvious effects. Appropriate management measures are the key to a good harvest of crab production throughout the year, so pay special attention to the following management measures. 1. Strengthen the water quality, aquatic grass management Crab shrimp ponds, due to the density, bait, crab shrimp discharge and other accumulation of more, with fresh just autumn, the water temperature is higher, easily lead to deterioration of water quality. Therefore, the fall of the pond water should be maintained at high water levels in order to increase the amount of fish carrying water and slow water temperature, ammonia nitrogen and other water quality physical and chemical factors dramatic changes.