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宁远县桐山乡宝塔脚村胡家自然村的“门前塘”,面积3.5亩,该塘由于多年放养,污泥增厚,每年养鱼都有不同程度的缺氧泛塘死鱼现象发生,单产一直在200公斤左右。1986年冬天,该自然村在结合干塘捕鱼时,组织劳力,将该塘污泥清除3万余担,塘泥全部用于植稻、菜、果。1987年投放鱼种1560尾,比1986年1320尾增加240尾,产鲜鱼1490公斤,比1986年650公斤增长1.3倍,成活率95％,比1986年增长50％。从以上两年养殖的结果可知,整治鱼塘所起的作用有如下几点: 1.增加蓄水量。由于将塘泥及沉积物清除,鱼塘环境得到了改善,塘水加深了,这样水质较稳定,不会发生突变带来泛塘死鱼的现象。
Ningyuan County Baoshan Fearong Village pagoda home village of “front door”, an area of 3.5 acres, the pond due to years of stocking, thickening of the sludge, fish each year have varying degrees of hypoxia Pan Tong dead fish, yield Has been about 200 kg. In the winter of 1986, when the village was fishing in combination with dry ponds, it organized labor and removed more than 30,000 tons of sludge from the pond. All the pond mud was used for planting rice, vegetables and fruits. In 1987, 1560 fish species were put into circulation, an increase of 240 fish from 1320 in 1986, producing 1490 kilograms of fresh fish, an increase of 1.3 times over 650 kilograms in 1986 and a 95% survival rate, an increase of 50% over 1986. From the results of the above two years of breeding we can see that the role of remediation ponds have the following points: 1. Increase the water storage. Due to the removal of pond mud and sediment, the environment of fish ponds has been improved and the pond water has been deepened. As a result, the water quality is relatively stable and no sudden death will occur in the pan pond.