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利用不同深度的渗漏池研究了陕西(土娄)土中NO_3-N运移特点及影响因素。结果表明,NO_3-N淋失量与土壤深度呈指数曲线关系,与施N量呈线性相关;NO_3-N淋移深度随地而接水量(降水量加灌水量)的增加而增大;NO_3-N在土壤剖面中的分布大部分都集中在0～60cm,含量高峰一般出现在20～40cm;不同施N方法对NO_3-N的淋失和在土壤中的积累都有明显的影响。
Using different depths of leachate pool, the characteristics and influencing factors of NO_3-N migration in the soil of Shaanxi Province were studied. The results showed that there was an exponential curve of NO3-N leaching and soil depth, which was linearly correlated with N application rate. The NO3- N leaching depth increased with the increase of water receiving amount (precipitation and irrigation) Most of the distribution of N in the soil profile concentrated in 0 ~ 60cm, the peak content generally appears in the 20 ~ 40cm; N application of different methods on the leaching of NO_3-N and the accumulation in the soil have a significant impact.