择伐对小兴安岭地区针阔混交林土壤呼吸温度敏感性的影响  

Effect of Sensitivity of Soil Respiration to Soil Temperature in a Conifer-Broadleave Forest in Xiaoxing’an Mountain after Select Cutting

作　　者：孟春[1] 王立海[1] 沈微[1] 

机构地区：[1]东北林业大学森林持续经营与微生物工程黑龙江省重点实验室,哈尔滨150040

出　　处：《林业科学》2011年第3期102-106,共5页Scientia Silvae Sinicae

基　　金：黑龙江省自然科学基金项目(ZJY04-09);林业科技支撑计划(2006BAD03A08-05);黑龙江省教育厅科学技术研究项目(11553035)

摘　　要：利用LI8100土壤二氧化碳排放通量全自动测量系统,测定小兴安岭地区针阔混交林不同强度择伐后4年的林地土壤呼吸速率和土壤温度。运用Q10模型分析择伐后林地土壤呼吸速率对土壤温度的敏感性。结果表明:择伐后林地Q10值高于未采伐林地,较高强度(60%,71%)的择伐使土壤呼吸速率对土壤温度具有高的敏感性。这一现象是3个土壤各组分呼吸对土壤温度响应综合作用的结果。枯枝落叶层呼吸速率对土壤温度的敏感性较差,根呼吸速率和矿质土壤层呼吸速率对土壤温度的敏感性较高。By using LI8100,measured the soil respiration rate and soil temperature in a conifer-broadleave forest in Xiaoxing’an Mountain.By using the model of Q10 ,the author studied the sensitivity of soil respiration rate to soil temperature.The result showed that after select cutting Q10 value were higher than that in no cutting land.Higher intensity select cutting（60% ,71%） made high sensitivity of soil respiration to soil temperature.This phenomenon was the result of the response of three partitioning respiration to soil temperature.Litter layer respiration had less sensitivity to soil temperature.Root respiration and mineral respiration had higher sensitivity to soil temperature.

关 键 词：择伐 土壤呼吸速率 土壤温度 Q10 

分 类 号：S718.516[农业科学—林学]