关键词: 鼠尾草属, 鼠尾草属, 石墨炉原子吸收, Pb, Cd

Abstract:

Nitrate leaching in farming soil is the main reason resulting in ground water pollution of nitrate. The author had summarized nitric nitrogen pollution in ground water in recent years, pointed out that fertilizer management and soil texture structure were major influencing factors. Also, some effective methods, such as fertilization based on nitrogen and organic fertilizers, rational cultivation, water management and new type efficiency fertilizer application, were put forward to reduce nitrogen leaching, reduce the ground water pollution and improve use efficiency. Also, the author introduced some evaluation measures, such as physical investigation, ions tracing method and model simulation, and their great significance. The combination of fertilizer management and model would be the hot research in future.