透光抚育对长白山中期“栽针保阔”红松林碳收支的影响  

Effects of light-felling on carbon budget of mid-term Korean pine forests by planting conifer and reserving broad-leaved tree in Changbai Mountains of China

作　　者：韩阳瑞[1,2] 牟长城[1] 庄宸[1] 张晓亮[1] 佟静秋[1] 程家友 曹万亮[4] 

机构地区：[1]东北林业大学生态研究中心,哈尔滨150040 [2]南通农学院,江苏南通226007 [3]吉林省白河林业局,吉林延边133613 [4]吉林省敦化林业局,吉林敦化133700

出　　处：《生态学杂志》2014年第9期2296-2307,共12页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31370461);"十二五"农村领域国家科技计划项目(2012BAD21B0202-03)资助

摘　　要：运用采伐试验与碳通量测定方法,研究透光抚育对长白山中期“栽针保阔”红松林碳收支的影响。结果表明：强度透光抚育与上层皆伐使土壤呼吸、自养呼吸和异养呼吸速率分别降低34.1%~39.2%、37.2%~42.4%和31.5%~37.3%（P〈0.05）,轻、中度透光抚育对三者无显著影响（P〉0.05）;中、轻度透光抚育与上层皆伐对其植被净初级生产力与年净固碳量并无显著影响（P〉0.05）,而强度透光抚育却使两者降低24.7%和27.0%（P〈0.05）;强度透光抚育与上层皆伐降低了其生态系统净碳排放41.5%和84.1%（P〈0.05）,而中、轻度透光抚育无显著影响（P〉0.05）。从维持森林碳汇与加速地带性顶极植被阔叶红松林恢复进程考虑,对中期“栽针保阔”红松林采取强度透光抚育或上层皆伐方式比较适宜。By using light-felling experiment and measuring carbon fluxes, the effects of light-fell- ing on the carbon budget of a mid-term Korean pine forests restored by planting conifer and reserving broad-leaved trees were investigated in Changbai Mountains of China. The results showed that both high-intensity light-felling and clear-cutting significantly decreased CO2 effluxes of soil respiration, autotrophic respiration, and heterotrophic respiration by 34.1%-39.2% , 37.2%- 42.4% and 31.5%-37.3% （P〈0.05）, respectively in the growing season, while the low- and moderate-intensity light-felling had no significant effects. Low- and moderate-intensity light-felling and clear-cutting had no significant effects on the net primary productivity and net carbon sequestration from the Korean pine forest （P〉0.05）, however, high-intensity light-felling signifi- cantly decreased the net primary productivity and net carbon sequestration by 24. 7% and 27.0%, respectively （P〈0.05）. Compared to the uncut stands, high-intensity light-felling and clear-cutting significantly decreased carbon emissions by 41.5% and 84.1% , respectively （P〈 0.05 ）, while low- and moderate-intensity light-felling had no influences on carbon emissions. Therefore, the high-intensity light-felling and clear-cutting should be taken for the mid-term Korean pine forests restored by planting conifer and reserving broad-leaved trees, in order to maintain forest carbon sinks and accelerate their recovery to climax forests.

关 键 词：“栽针保阔”红松林 土壤呼吸 碳排放 年净固碳量 碳汇 透光抚育 

分 类 号：S753.511[农业科学—森林经理学]