不同农业用地对土壤中氮影响的研究进展

Progress in the effect of different agricultural land on the soil nitrogen

总结了氮在土壤中的氮矿化过程、氮硝化作用和氮反硝化作用,以及不同农业用地对土壤中氮的影响。结果表明,在不同的水稻耕作方式下,双季稻的土壤全年平均含氮量最高;在不同的覆盖方式下,盖草处理后茬大麦表层土壤硝态氮含量最高;保护性耕作、退化土地农用、退耕还林对土壤中的氮都有影响。将"3S"技术与土壤中氮的研究相结合,注重多学科交叉进行定性和定量分析,是今后研究的新发展。

The chemical processes of nitrogen in soil,including the nitrogen mineralization,nitrification and denitrification,were summarized in the paper.The effects of tillage patterns,crops types and mulching patterns on soil nitrogen were also introduced.The nutrition was the most active in land planted with fruit and vegetables.Land planted with double-cropping paddy contained the highest nitrogen content,and the highest nitrate was found in surface soil of barley-planted land after covering with grass.The nitrogen in soil varied significantly during conservation tillage,degenerated land exploitation and land reforest utilization.More research was necessary to combined soil nitrogen studies with '3S' technologies and focusing on qualitative and quantitative analysis on interdisciplinary studies.