CO2Emissions from Soils in Subalpine Dark Coniferous Forest Region of Gongga Mountain

作     者：Wei LI Ji LUO Guoqing JIA Danli YANG Yongmei HE 

作者机构：Key Laboratory of Mountain Surface Processes and Ecological RegulationInstitute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China Gongga Mountain National Nature Reserve AdministrationKangding 626000China 

出 版 物：《Agricultural Biotechnology》 (农业生物技术（英文版）)

年 卷 期：2019年第8卷第5期

页      面：76-78,85页

学科分类：09[农学] 

基　　金：Supported by National Key Research and Development Program of China(2017YFC0504903 2016YFC0503305) National Natural Science Foundation of China(41771062) CAS Key Technology Talent Program(CAS201665) 

主　　题：Abies fabri forest CO2 emission Coefficient of variation Q10 Subalpine 

摘      要：A field experiment was carried out to examine the soil respiration rate in Abies fabri forests in Gongga Mountain National Nature Reserve using LI-6400-09 portable soil respiration *** results showed that the soil respiration rate and soil temperature of mature and middle-aged *** forests were different in each *** soil CO2 emission rates of the two stands had obvious seasonal variation characteristics,which were arranged: summer autumn spring winter;the monthly average soil CO2 emission rate of the mature aged forest ranged from 0.82 to 5.88 μmol/(s·m^2),with the coefficient of seasonal variation of 50.6%;and the average monthly soil respiration rate of middle-aged forest was in the range of 0.52-3.52 μmol/(s·m^2),with the coefficient of seasonal variation of 48.5%.The seasonal variation of soil CO2 emission rate was positively correlated with the 5 cm soil *** the Q10 values of the soil CO2 emission rates in the mature and middle-aged *** forests were 3.2 and 2.6,respectively,and the sensitivity index of CO2 emission to temperature in the mature *** forest was higher than that in the middle-aged forest.