The nitrogen infiltration experiment was carried out indoors with the self- made device of the film hole infiltration to observe the distribution rules on nitrogen transportation and transformation under film hole irrigation. The total infiltration volume of film hole and nitrogen distribution in soil under different urea solution concentration were studied. The results show that the total infiltration volume increases with urea solution concentration. The urea solution concentration has little effect on the ammonium and nitric nitrogen distribution in soil profile, while obvious effect on their amount. The amount and the distribution of nitric nitrogen increase with the urea solution concentration.%为研究膜孔灌灌施条件下氮素运移转化分布规律,利用研制的膜孔点源入渗装置,在室内进行灌施条件下的氮素入渗试验,测试不同尿素肥液浓度下膜孔累积入渗量及土壤中氮素含量.结果表明:累积入渗量随灌施肥液浓度增大而增大;尿素肥液浓度对土壤中铵态氮及硝态氮含量在剖面分布影响较小,对其含量影响较大;转化生成的土壤铵态氮、硝态氮含量及土壤硝态氮分布范围随灌施肥液浓度增大而增大.
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