河滨带土壤氮、磷自然渗透与迁移特征研究

为了探讨河滨带土壤特性，采用过硫酸盐消化法和M3法，对河滨带不同深度土壤N、P含量进行测定，分析其在河滨带纵向土壤中的自然渗透和横向迁移特征。研究结果表明：吸光度与氮和有效磷的校准曲线：y=-0.1308+0.2546x，R2=0.9173和y=0.0287+0.5617x，R2=0.9675，相关性非常好。该河滨带土壤N、P主要分布在0~10 cm土壤层，以5 cm土壤层为最高，表层土壤中N、P含量显著高于下层土壤，总体呈由上到下的迁移特征；河滨下游土壤表层含N量明显高于上游，而土壤含P量在上游主要集中在土壤表层，在下游主要集中在5 cm土层中。因此分析河滨带纵向土壤中的自然渗透和横向迁移特征必须从纵向和横向两方面来综合抑制土壤中氮、磷的不断升高的趋势。

Riverside with Natural Permeability and Migration Characteristics of Soil Nitrogen and Phosphorus

For the discussion on the riverside of soil characteristics,by the persulfate digestion and M3 methods determine the N,P content at different depths of the soil,analyzed the characteristics of the soil ＇ s longitudinal natural infiltration and transverse migration in riverside.The results showed that：the N,P content at different depths of the soil was y=-0.1308＋0.2546x,R 2 =0.9173 and y=0.0287＋0.5617x,R 2 =0.9675,which had a good correlation.The N,P content of riparian zone soil mainly distributed in 0-10 cm soil layer,the highest was in 5 cm soil layer,the N,P content in surface soil was significantly higher than the lower soil,the characteristics assumed that migration from top to bottom.The surface soil of downstream riverside with N content was significantly higher than the upstream,while the volume of soil containing of P mainly concentrated in the upper soil surface,and the mainly concentrate was upon 5 cm soil layer in the lower reaches.Analysis on the characteristics of the soil＇s longitudinal natural infiltration and transverse migration in riverside must be intergrated suppress the rising trend of soil nitrogen,phosphorus content from the vertical and horizontal.