家畜排泄物驱动的草地氧化亚氮释放及其影响因素

Nitrous oxide release from grassland driven by livestock excreta and its influencing factors

家畜排泄物是产生氧化亚氮(N2O)的热点区域,对于温室效应具有重要影响。本文综合国内外家畜排泄物驱动的N2O的现有研究成果,对家畜排泄物驱动的N2O释放过程和影响因素进行综述。研究发现,家畜排泄物中的营养元素通过影响微生物的硝化作用、反硝化作用以及硝化细菌的反硝化作用驱动N2O的释放,该过程受到排泄物自身的特性、土壤理化性质和植被特征等方面的影响。在综述前人研究的基础上,就今后草地N2O释放的研究重点和方向进行了展望。

Livestock excreta represent a major source of nitrous oxide(N2 O),the emission of which makes a significant contribution to the greenhouse effect.In this review,based on available knowledge,we summarize the N2 O release process driven by livestock excreta and the associated driving factors.The input of livestock excreta to the soil results in changes in the microbial processes of nitrification and denitrification,and denitrification of nitrifying bacteria,thereby regulating the production and release of N2 O.These processes can be affected by the type of excreta,soil physicochemical properties,and plant characteristics.On the basis of current research,we propose suggestions for the focus and direction of further research on N2 O emissions.