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天津西郊黑牛城乡万年青社,1957年在1,400亩大面积的水稻上灌溉了污水,结果施用三次污水的海亩产量为700斤,比全郊区平均产量增加30斤,在投资上,比每亩施用牛粪3,000斤作底肥再追施化肥15斤的降低成本20元。对过去除不尽的带子草、螃蟹、泥鳅,由于施用污水都绝迹了。地下污水多系市内居民的粪便、生活污水,夹杂
In the western suburbs of Tianjin, Black Cattle Township and Wanniu Youth Association, in 1,457 acres of large-scale irrigation of rice on the water, the results of the application of three sewage sea yield per mu for the 700 kg, 30 per cent more than the entire suburbs of the average output increase in investment, every Million mu of cattle manure to be applied at the base fertilizer fertilizer 15 pounds and then reduce the cost of 20 yuan. Except for the past on the endless belt grass, crab, loach, due to the application of sewage are extinct. Underground sewage and more people in the city of excrement, domestic sewage, inclusions