氮添加对全球陆地生态系统氧化亚氮排放的影响  

Effects of Nitrogen Addition on N_(2)O Emissions from Global Terrestrial Ecosystems

作　　者：韦傲萍 王小华 任兰天 吴文革[2] WEI Aoping;WANG Xiaohua;REN Lantian;WU Wenge(Anhui Engineering Research Center for Smart Crop Planting and Processing Technology,College of Agriculture,Anhui Science and Technology University,Chuzhou 233100,China;Rice Research Institute,Anhui Academy of Agricultural Sciences,Hefei 230041,China)

机构地区：[1]安徽科技学院农学院安徽省智能作物种植与加工技术工程研究中心,安徽滁州233100 [2]安徽省农业科学院水稻研究所,安徽合肥230041

出　　处：《中国草地学报》2025年第2期144-150,共7页Chinese Journal of Grassland

基　　金：安徽省高校协同创新计划(GXXT-2023-102);安徽省高校自然科学研究重点项目(2022AH051629);安徽科技学院人才引进项目(NXYJ201902,NXYJ202002);安徽省教育厅重点项目(2022AH051629)。

摘　　要：氮沉降是全球陆地生态系统氧化亚氮(N_(2)O)排放的重要驱动因素之一,研究氮沉降对N_(2)O排放的影响机制对气候变化的预测具有重要意义。已有多项研究评估了土壤N_(2)O排放对氮素添加的响应模式,但对其调控模式和机制仍存在一定争议。本研究对全球87项研究进行整合分析发现,氮添加加剧了土壤N_(2)O的排放,这种效应在高施氮量[>200 kg/(hm^(2)·年)]、低降雨区域(≤400 mm)以及中短期施氮(≤3年)等条件下尤为显著。在全球范围内,氮施用量、年降雨和生态系统类型是影响N_(2)O排放的主要因素。Nitrogen deposition represents a critical driver of nitrous oxide(N_(2)O)emissions in global terrestrial ecosystems,with profound implications for climate change prediction.Although numerous studies have investigated soil N_(2)O emissions patterns in response to nitrogen addition,controversies persist regarding the regulatory mechanisms and driving factors.Through a meta-analysis intergrading the 87 global studies,we demonstrate that nitrogen addition significantly enhances soil N_(2)O emissions.This effect is particularly pronounced under high nitrogen application rate(>200 kg/hm^(2)year),in low-precipitation regions(≤400 mm annual rainfall),and with short-term and moderate-term nitrogen application(≤3 years).Our analysis identified nitrogen input level,mean annual precipitation,and ecosystem type as the dominant factors controlling global N_(2)O emissions,providing a scientific foundation for developing targeted emission mitigation strategies.

关 键 词：氮添加 氧化亚氮 荟萃分析 草地 

分 类 号：S143.1[农业科学—肥料学]