摘要
随着城市化进程的加剧,城市绿地土壤呼吸对城市及全球碳循环的影响越来越明显。为研究城市土壤呼吸特点及其影响因素,选取城市主要绿地类型(校园绿地、公园绿地、居住区绿地、工厂绿地)土壤为研究对象,对其土壤呼吸、土壤温度、土壤含水率及土壤理化性质进行近两年的动态观测。结果表明,研究期内土壤呼吸变幅为0.72~5.59μmol m^(-2)s^(-1),其中居住区绿地土壤呼吸范围为0.72~2.39μmol m^(-2)s^(-1),工厂绿地土壤呼吸范围为1.73~4.10μmol m^(-2)s^(-1),公园绿地土壤呼吸范围为1.95~5.59μmol m^(-2)s^(-1),校园绿地土壤呼吸范围为1.85~5.09μmol m^(-2)s^(-1);绿地类型,月份及土壤温度对土壤呼吸影响显著(P<0.05);持续降水后,土壤含水率对土壤呼吸产生显著影响(P<0.05)。0~10 cm土壤有机碳、NO3-N,全P含量及细根生物量(R<2 mm)与土壤呼吸呈显著正相关(P<0.05),土壤溶解性有机碳含量与土壤呼吸呈显著负相关(P<0.05)。
With the acceleration of urbanization, the influence of urban soil respiration on regional and global carbon cycling become more and more important. In order to evaluate the characteristics of urban soil respiration and the controlling factors, we investigated soil respiration, temperature, moisture content and soil properties in urban green-lands（including campus green-land, park green-land, residential green-land and factory green-land） based on nearly two years of field measurements. The results showed that soil respiration rates were ranged from 0.72 to 5.59μmol m-2s-1. Soil respirationranged from 0.72 to 2.39 μmol m-2s-1in resident,from 1.73 to 4.10 mol m-2s-1in factory,from 1.95 to 5.59 mol m-2s-1in park and from 1.85 to 5.09 mol m-2s-1in campus. Green-land types, months and soil temperature had significant influence on soil respiration（P 〈 0.05）. In addition, in warm and wet seasons,after precipitation, soil moisture instead of temperature influenced soil respiration significantly（P 〈 0.05）. Soil properties that concentrated on 0- 10 cm soil depth have important influence on soil respiration. Soil organic carbon,NO3--N, P and fine root density（R 〈 2 mm） had positive influence on soil respiration（P 〈 0.05）, however, soil dissolved organic carbon has negative influence on it（P 〈 0.05）.
出处
《土壤通报》
CAS
CSCD
北大核心
2016年第1期54-59,共6页
Chinese Journal of Soil Science
基金
国家自然科学基金(31370626)
安徽省自然科学基金(1408085QC69)资助
关键词
城市土壤
土壤呼吸
绿地类型
土壤理化性质
环境因素
Urban soil
Soil respiration
Land use type
Soil properties
Environmental factors
