【摘要】 综述了近年来我国保护地土壤氮素养分研究的现状。主要包括氮素养分积累、硝酸盐累积、氨态氮挥发及硝态氮淋失以及影响土壤氮素养分累积和损失的因素等方面。长期过量施肥及大水漫灌等措施是造成土壤养分累积、硝酸盐淋失严重、肥料利用率低的根本原因。今后应在加强保护地土壤氮素循环研究的基础上,将氮的形态转化及土壤供氮能力研究作为保护地土壤氮素研究的一个重要方向。更多还原

【Abstract】 This paper summarized development and advance of soil nitrogen nutrient in protected field in the recent years.These researches mainly include nitrogen nutrient accumulation,nitrate accumulation,ammonia volatilization and nitrate leaching as well as the influencing factors of accumulation and loss of soil nitrogen nutrient.Accumulation of soil nutrients,serious nitrate leaching,low fertilizers utilization rate were caused by excessive fertilization and inappropriate water management.We should strengthen the research on soil nitrogen cycle in protected field,especially in transformation of nitrogen forms and soil nitrogen supply capacity which was an important research direction of nitrogen nutrient in the future.更多还原