模拟增温对不同月份蒙古栎林土壤呼吸的影响  

Effects of Simulated Warming on Soil Respiration of Quercus mongolica Forest in Different Growing Seasons in Sanjiang Plain

作　　者：王剑南 崔嵘 杜阳 池成林 张国强 张国庆 张吉利 WANG Jian-nan;CUI Rong;DU Yang;CHI Cheng-lin;ZHANG Guo-qiang;ZHANG Guo-qing;ZHANG Ji-li(Harbin Research Institute of Forestry Machinery,National Forestry and Grassland Administration,Harbin 150086;Research Center of Cold Temperate Forestry,CAF,Harbin 150086;College of Forestry,Northeast Forestry University,Harbin 150040;Fuyuan Forest and Grass Industry Development Center,Fuyuan 156500)

机构地区：[1]国家林业和草原局哈尔滨林业机械研究所,哈尔滨150086 [2]中国林业科学研究院寒温带林业研究中心,哈尔滨150086 [3]东北林业大学林学院,哈尔滨150040 [4]抚远市林草事业发展中心,抚远156500

出　　处：《温带林业研究》2023年第3期1-7,共7页Journal of Temperate Forestry Research

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2020ZA001-1)。

摘　　要：【目的】探索全球气候变暖对三江平原蒙古栎林碳排放量的影响。【方法】以三江平原蒙古栎次生林为研究对象,研究不同生长季土壤呼吸组分对红外线辐射器模拟增温的响应。【结果】模拟增温使蒙古栎林6月断根组土壤体积含水量显著升高,断根组的土壤体积含水量均显著高于未断根组。模拟增温使6月断根组土壤呼吸速率显著降低,而相同增温条件下断根处理会导致土壤呼吸速率显著降低。不同生长季异养呼吸速率占比均达到50%以上。土壤温度与土壤总呼吸速率、土壤异养呼吸速率均呈现极显著指数正相关关系,土壤体积含水量与土壤总呼吸速率、土壤异养呼吸速率呈现显著线性负相关关系。模拟增温导致土壤呼吸敏感性升高,而相同增温条件下断根处理会导致土壤呼吸敏感性降低。双因素方差结果表明,以断根为自变量时主效应存在,而以增温为自变量时主效应不显著。【结论】模拟增温总体上未对蒙古栎林土壤总呼吸速率及土壤异养呼吸速率造成显著影响,可能是由于模拟增温开展时间较短,增温幅度较低造成。【Objective】To explore the effects of global warming on carbon emissions of Quercus mongolica forest in Sanjiang plain.【Method】In this study,the response of soil respiration components to simulated warming by infrared radiator in different growing seasons of Quercus mongolica forest secondary forest in Sanjiang plain was studied.【Result】The main results showed that the simulated temperature increase significantly increased the soil volumetric water content in the broken root group in June,and the soil volumetric water content in the broken root group was significantly higher than that in the unbroken root group.The simulated temperature increase significantly reduced the soil respiration rate at the root-cutting group in June,while the same temperature increase caused a significant decrease in the soil respiration rate.The proportion of heterotrophic respiration rate in different growing seasons was more than 50%.Soil temperature was significantly positively correlated with total respiration rate and heterotrophic respiration rate,while soil volume water content was significantly negatively correlated with total respiration rate and heterotrophic respiration rate.Simulated temperature increase resulted in an increase in soil respiratory sensitivity,while root-cutting treatment resulted in a decrease in soil respiratory sensitivity under the same temperature increase condition.The results of two-factor variance show that the main effect exists when the root breaking is taken as the independent variable,but the main effect is not significant when the temperature increasing is taken as the independent variable【.Conclusion】In general,simulated warming did not have significant effects on soil total respiration rate and soil heterotrophic respiration rate in Quercus mongolica forest.This study can provide theoretical basis for reducing carbon emissions and controlling local temperature increase in local Quercus mongolica forest,and provide data support for local forest management and carbon sink manageme

关 键 词：土壤呼吸 蒙古栎林 模拟增温 土壤呼吸敏感性 

分 类 号：S714[农业科学—林学]