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肥料是作物的粮食,全党全民正为大办农业、大办粮食,千方百計寻找各种肥源,积造各种肥料。城市污水是一种含有大量氮素的肥料,充分利用城市污水灌溉农田在解决郊区农业生产上肥料不足、增加灌溉水源及改善城市环境卫生等方面具有相当重要的意义。为了研究城市污水在农业生产上的效益,1960年我們曾在北京海淀区六郎庄等地进行了调查研究,搜集了一些資料,現把它綜合整理簡述如下,以供参考。
Fertilizer is the grain of crops. The entire party and the whole people are now running large farms and doing a great deal of food. They try their best to find various kinds of manure sources and build a variety of fertilizers. Urban sewage is a fertilizer containing a large amount of nitrogen. It is of great significance to make full use of urban sewage to irrigate farmland in order to solve the problem of insufficient fertilizers on agricultural production in the suburbs, increasing irrigation water sources and improving urban sanitation. In order to study the benefits of urban sewage in agricultural production, we conducted a survey in 1960 in the area of Liu Langzhuang, Haidian District, Beijing, and collected some information. We have summarized the following in a comprehensive way for reference.