城市垃圾与人粪尿等混合堆腐制成的垃圾肥料,是市郊菜地的重要有机肥源。随着城市人口的增加和人民生活水平的提高,城市垃圾的排放量也日益增多。据统计,近年来杭州市区每天倾倒生活垃圾600～700吨,年倾出量达20余万吨。若按其中的60％制成堆肥用于菜地,则全市25000亩菜地平均每亩约可施入垃圾肥5000公斤。这么多的垃圾肥 Urban garbage and human waste and other mixed heap made of garbage fertilizer, is an important source of organic fertilizers in the suburbs. With the increase of urban population and improvement of people’s living standard, the discharge of urban rubbish is also increasing day by day. According to statistics, in recent years, 600 to 700 tons of household garbage are dumped daily in the Hangzhou urban area, with an annual dumping volume of over 200,000 tons. If 60% of the compost is made into compost for vegetable cultivation, the average acreage of 25000 mu of vegetable plot in the whole city can be put into garbage kilos of about 5000 kg. So much rubbish