土壤活性氮气体排放研究进展

氮肥的不合理施用导致土壤活性氮气体(Nr,包括N2O、HONO、NOx、NH3等)过度排放,严重威胁着生态环境和人类健康.综述了土壤Nr排放的主要途径,探讨了土壤微生物过程、施肥、土壤温度、土壤水分含量、耕作方式及其他调控因素对土壤Nr排放的影响,总结了土壤Nr排放通量估算的研究现状.提出未来的研究还需结合多种手段,例...

Soil reactive nitrogen gases emission: A review

Improper application of nitrogen fertilizers may lead to excessive emissions of soil nitrogen gases (N_r,including N₂O,HONO,NOx,NH₃,etc.),which may seriously threaten the ecological environment and human health.Emission of N_r from soil involves a variety of biotic and abiotic processes,which have complex mutual interactions.Soil physical and chemical properties,fertilization factors,climate,etc.will all affect the production and emission of soil N_r to a certain extent.This paper summarizes the current research status of soil N_r emission processes,regulatory factors,and soil N_r emission flux estimation.We further argue that future research should adopt a variety of methods,such as the combination of macro and micro studies,multi-disciplinary cross studies,combination of GIS technology and mechanic modelling,metagenomics sequencing,remote sensing observation and other techniques,and so on.More work should focus on in-depth exploration of key mechanisms,driving factors and spatial patterns of soil N_r emissions,as well as the response of soil N_r emissions to global change and carbon neutrality,and improving estimation models of soil N_r emission.This review provides a scientific basis and guidance for effectively controlling and reducing atmospheric N_r pollution,improving air quality and optimizing nitrogen fertilizer utilization.