不同土壤调理剂配合施用对高氮土壤氮素吸收影响研究

Effects of different soil conditioners on nitrogen absorption in high nitrogen soils

本试验采用腐植酸、明矾、白云石、沸石4种调理剂及配比共设7个处理对高氮土壤氮素吸收的影响进行研究。结果表明:施加土壤调理剂可以促进糯玉米生长,其株高、茎粗与叶绿素含量有所提高。在施加调理剂的各处理中,施加明矾可以增加作物生物量干重,单施明矾和腐植酸+明矾+沸石+白云石配合施用可以显著提高玉米吸氮量。调理剂白云石对降低土壤全氮含量效果最明显,施加明矾可以降低土壤中硝态氮含量,减少土壤中氮素的累积,改善环境风险。该试验将为设施土壤氮素面源污染控制提供某些技术途径。

The effects of seven treatments by the humic acid,alum,dolomite,zeolite four conditioners and ratio on nitrogen absorption in high nitrogen soils were studied.The results showed that applying conditioners could promote waxy corn growth and effectively increase plant height,stem diameter and chlorophyll content of waxy corn.In each treatment to apply conditioner,the application of alum could increase the dry weight of crop biomass.The combined application of singly applied alum and humic acid plus alum+zeolite+dolomite could significantly increase the amount of nitrogen absorbed by corn.Conditioning agent dolomite had the most obvious effect on reducing soil total nitrogen content.Applying alum could reduce nitrate nitrogen content in soil,reduce soil nitrogen accumulation and nitrogen environmental risk.This experiment would provide certain technical approaches for controlling nitrogen non-point source pollution in high nitrogen soils.