氮素形态对典型生态系统土壤CO_(2)排放的影响效应  

Effects of Nitrogen Forms on Soil Carbon Dioxide Emissions in Typical Ecosystems in China

作　　者：王晓瑞 肖国良 董雅梦 张欣桐 穆曼娅 姚沛 潘学陶 WANG Xiao-rui;XIAO Guo-liang;DONG Ya-meng;ZHANG Xin-tong;MU Man-ya;YAO Pei;PAN Xue-tao(School of City and Regional Planning,Yancheng Teachers University,Yancheng 224007,China;Jiangsu Key Laboratory for Bioresources of Saline Soils,Yancheng 224007,China;Jiangsu Provincial Key Laboratory for Resources Environment Evolution and Intelligent Regulation of Coastal Zonen,Yancheng 224007,China;United Testing Services(Fujian)Co.,Ltd.,Quanzhou 362799,China;School of Resources and Environment,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]盐城师范学院城市与规划学院,江苏盐城224007 [2]江苏省盐土生物资源研究重点实验室,江苏盐城224007 [3]江苏省海岸带资源环境演变与智能调控重点实验室,江苏盐城224007 [4]中联品检(福建)检测服务有限公司,福建泉州362799 [5]河南理工大学资源环境学院,河南焦作454003

出　　处：《环境科技》2024年第5期68-72,共5页Environmental Science and Technology

基　　金：江苏省高等学校自然科学研究面上项目(19KJD170003);江苏省盐土(滩涂)重点实验室开放课题(JKLBS2019007);盐城市重点研发计划(社会发展)面上项目(YCBE202242).

摘　　要：大气中CO_(2)含量增加引发的温室效应已备受关注,土壤CO_(2)排放作为其主要来源之一,氮沉降(特别是氮素形态)对土壤CO_(2)排放具有重要影响。从生态系统类型、地理区域及施氮方式3方面,探讨氮素形态与土壤CO_(2)排放的关系。结果表明,我国典型生态系统土壤CO_(2)排放对不同形态氮的响应存在不确定性,呈促进、抑制作用或无显著影响;通常情况下,混合态氮对湿地、森林生态系统土壤CO_(2)排放的促进作用强于单一态氮;南方地区部分生态系统土壤CO_(2)排放对氮素形态主要体现为负响应,北方部分地区则在不同阶段生长季表现不同;不同施氮方式通过调节地上和地下生态过程,进而影响土壤CO_(2)排放。The greenhouse effect caused by the increase of CO_(2)content in the atmosphere has attracted much attention.Soil CO_(2)emission is one of its main sources,and nitrogen deposition(especially nitrogen form)plays an important role in soil CO_(2)emission.The relationship between nitrogen forms and soil CO_(2)emission was discussed from three aspects:ecosystem type,geographical area and nitrogen application method.The results showed that the response of soil CO_(2)emissions to different forms of nitrogen in typical ecosystems in China was uncertain,showing promotion,inhibition or no significant effect.In general the promoting effect of mixed nitrogen on soil CO_(2)emission in wetland and forest ecosystems was stronger than that of single nitrogen.The soil CO_(2)emission of some ecosystems in the southern region was mainly negative response to nitrogen forms,while that in some parts of the northern region was different in different growing seasons.Different nitrogen application methods affect soil CO_(2)emissions by regulating aboveground and underground ecological processes.

关 键 词：氮素形态 土壤CO_(2)排放 生态系统 氮添加 

分 类 号：X5[环境科学与工程—环境工程]