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随着城市化的快速发展，生活污水的排放量在急剧增加，越来越多的池塘受生活污水的污染，养殖成鱼产量普遍较低。有些鱼塘慢慢被废弃，变成一潭死水。如何充分合理地利用这样的污水塘 ?我们于 1999～ 2000年对我校的一口面积 2000米 2的污水塘进行建鲤鱼种培育试验，年产 3批
With the rapid development of urbanization, the discharge of domestic sewage is rapidly increasing. More and more ponds are polluted by domestic sewage and the production of farmed adult fish is generally low. Some fishponds are slowly abandoned and become stagnant water. How to make full and reasonable use of such sewage ponds? In 1999-2000, we built a carp breeding test on a sewage pond with a surface area of 2000m2 with an annual output of 3 batches