淮南市4种土地利用类型土壤CO_2通量变化及其影响因素  

Soil CO_2 Flux Change and Its Effect Factors from 4 Different Land Use Types in Huainan City

作　　者：周助 夏文博[1] 王芳[1] 李兴薇 陈群[1] 杨雪玲[1] 陈孝杨[1] ZHOU Zhu XIA Wen-bo WANG Fang LI Xing-wei CHEN Qun YANG Xue-ling CHEN Xiao-yang(School of Earth and Environment, Anhui University of Science and Technology, Huainan, Anhui 232001, China)

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001

出　　处：《城市环境与城市生态》2016年第6期22-25,28,共5页Urban Environment & Urban Ecology

基　　金：国家自然科学基金(41572333;51274013);国家大学生创新创业训练计划项目(AH201510361132)

摘　　要：采用"静态气室+碱液吸收"法,对淮南市4种土地利用类型:草地、林地、农田和复垦林地土壤CO_2通量进行了监测。并基于各影响因素以及土壤理化性质的测定数据,分析了不同土地利用类型土壤CO_2通量变化特征及其环境响应。研究结果表明:CO_2通量一天内的变化总体均呈单峰状态,但类型间存在一定差异,且各自达到峰值的时间不同;不同土地利用类型土壤对CO_2通量影响显著,4种土地利用类型土壤通量平均值大小依次为:草地>林地>农田>复垦林地;CO_2通量与地表温度成指数型函数关系,相关系数R=0.573,为极显著相关(P<0.01),而地下5 cm土壤温度对CO_2通量影响较弱。Soil CO2 flux was monitored with the ＂static chamber ＋ alkali absorption＂ method from four types of land use in Huainan City, Anhui Province. The land use types were grassland, woodland, farmland, and reclaimed woodland. Based on the data of various influence factors, soil physical and chemical properties were analyzed to measure the CO2 flux change of different land use types and environmental responses. The research results showed that the change of CO2 flux within one day was in a single peak distribution, but there were some differences among land types and each type reached its peak value at different times. Different types of land use influenced significantly the CO2 flux, and the order of flux average values of the four land use types were： grassland woodland farmland reclaimed woodland. The CO2 flux and soil surface temperature formed an exponential function relationship. Its correlation coefficient was 0.573 with significant correlation（P〈0.01）, but the effect of underground temperature at 5cm deep on CO2 flux was weak.

关 键 词：土壤CO2通量 土地利用类型 土壤理化性质 淮南市 

分 类 号：F301.2[经济管理—产业经济] X196[环境科学与工程—环境科学]