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一、为什么粪便要进行管理人、畜粪尿是当前我国重要肥源之一,它含有庄稼不可缺少的氮、磷、钾三种要素。据统计,我国每年的人粪尿相当于硫酸铵878万吨,过磷酸钙184万吨,硫酸钾173万吨,加上家禽、牲畜粪尿和垃圾等,其数量更为可观。用粪便施肥不仅能提高土壤肥力,还可改良土壤结构,大寨的海绵田就是靠施农家有机肥料造成的,所以粪便是农业生产的宝贵肥料。但是,新鲜粪便内存在大量的微生物(每克粪便中含细菌100万～4亿个),往往含有
First, why the manure should be managed, livestock excreta is one of China’s important source of fertilizers, it contains indispensable crops of nitrogen, phosphorus and potassium three elements. According to statistics, China’s annual human excrement is equivalent to 8.78 million tons of ammonium sulfate, 1.84 million tons of superphosphate, 1.73 million tons of potassium sulfate, together with poultry, livestock excrement and garbage, the number is even more impressive. Manure fertilization can not only improve soil fertility, but also improve the soil structure. Dazhai’s sponge field is caused by organic fertilizers of Shih Nongjia, so manure is a precious fertilizer for agricultural production. However, there are a large number of microorganisms in fresh manure (1 million to 400 million bacteria per gram of feces) and often contain