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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。
Using the methods of harvesting test and carbon flux determination, the effects of light and tending on the carbon budget of Pinus koraiensis and Pinus koraiensis in mid-term were studied. The results showed that soil respiration, autotrophic respiration and heterotrophic respiration decreased by 34.1% -39.2%, 37.2% -42.4% and 31.5% -37.3% (P <0.05) There was no significant difference in net primary productivity and annual net carbon sequestration (P> 0.05) between moderate and light clear tending and upper clear-cut tending, However, intensity and light tending decreased both by 24.7% and 27.0% (P <0.05). Intensity and light tending and upper clear cutting reduced their net ecosystem carbon emissions by 41.5% and 84.1% (P <0.05) , No significant effect of light transmission and tending (P> 0.05). Considering the process of forest carbon sinks and accelerating the recovery process of the broad-leaved Korean pine forest, it is appropriate to adopt intensity light-tending and tending or upper-layer clear cutting in the mid-term.