池塘连续养鱼,经多年的施肥、投饵、鱼的排泄以及常年淤积,池底淤泥逐年增加,一般300cm左右、多达500cm,致使鱼病、病种越来越多,有害生物增加,鱼产量下降,效益低而不稳。因此,老口鱼池的更新改造及合理利用,是摆在鱼场面前急需解决的重要工作任务。我们经过近几年的试验和探讨,总结出以下经验,供参考。 1 鱼池清淤对池底淤泥较深,特别是对底泥300cm以上的老口池塘,应逐年轮换干塘,进行清淤(有条件的要一次性清淤)。把池底淤泥全部彻底清除。这样底泥做农田肥料,又消灭有害生物及病原菌,还能 Pond continuous feeding of fish, after years of fertilization, feeding, excretion of fish and perennial siltation, the bottom silt increased year by year, generally about 300cm, up to 500cm, resulting in fish disease, disease more and more pests increase, fish Production decline, low efficiency and instability. Therefore, the renovation and rational utilization of the old mouth fish pond is an important work task urgently needed to be solved before the fish farm. After the recent years of experiments and discussions, we have summarized the following experiences for reference. 1 fish pond dredging on the bottom of the deep silt, especially for the sediment 300cm above the mouth of old ponds, should be rotated dry ponds every year, dredging (conditional to a one-time dredging). The bottom of the mud completely clear. This sludge to do farmland fertilizer, but also eliminate pests and pathogens, but also