一、分布广泛的肥水资源地下肥水是一种含有一定数量的硝态氮素的地下水,是一种天然的氮素肥源,用于农田灌溉,可使作物肥,水兼得,增产效果十分显著。山东荷泽地区曾在九个县内开展了地下肥水的普查工作。结果,在不同类型的81810眼水井中发现含有硝态氮素的肥水井3014眼,可见分布范围相当广泛。每50方二级肥水中含氮量便相当于浓度为18%的氨水15 First, the distribution of a wide range of fertilizer and water resources Underground fertilizer is a kind of groundwater containing a certain amount of nitrate nitrogen, is a natural source of nitrogen for farmland irrigation, crop fertilizer, water both yield a lot of results Significant. Shandong Heze area in nine counties carried out underground fertilizer survey. As a result, 3014 eyes of fertile wells containing nitrate nitrogen were found in 81,810 wells of different types, showing a wide range of distribution. The amount of nitrogen in each of the two secondary fertilizers equals the concentration of 18% ammonia 15