根系分泌物对根际土壤关键氮转化过程的影响

根系分泌物是影响土壤氮素转化、N₂O排放和植株氮肥利用率的重要因素之一,也是土壤学、植物营养学、作物生理生态与耕作栽培学、环境科学等学科的重要关注点。为全面认识根系分泌物在土壤氮循环中的作用,综述了根系分泌物的种类和测定方法,介绍了根系分泌物影响土壤关键氮转化过程及N₂O排放的机理,根系分泌物对土壤硝化和反硝化过程及N₂O排放的抑制作用,并对该领域未来的研究方向进行了展望。为土壤氮素转化的土壤–植物–微生物互作机制研究提供一定参考,以进一步提高氮肥利用率,减少氮肥引起的环境污染。

Effects of Root Exudates on Key Processes of Soil Nitrogen Cycling: A Review

Root exudates play an important role in soil nitrogen cycle, N₂O emissions, and plants nitrogen use efficiency, and it is also at the forefront of soil science, plant nutrition, environmental science and interdisciplinary. In order to understand the effects of root exudates on the nitrogen cycle in the soil, this position paper presents the fractions and the methods to study root exudates. The effects of root exudates on the most important nitrogen conversion processes in soils were investigated. The ability to suppress soil nitrification, denitrification and N₂O emissions through the release of exudates from plant roots is highlighted and the further prospects are suggested. This work will provide some references for the investigation of the nitrogen cycle mechanism of interaction effects between soil-plant-microorganisms to further improve the utilization rate of nitrogen fertilizer and reduce the environmental pollution caused by nitrogen fertilizer.