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科学合理地计量采伐对森林碳储量的保护有重要的现实意义,已引起了越来越多的关注。在对闽北天然次生林择伐与更新研究基地进行长期监测的基础上,结合伐木制品的碳储量及碳排放过程,综合分析了不同强度采伐对生态系统碳库的影响。结果表明,仅从乔木层生物量池看,弱度择伐后10 a碳储量已经超过伐前,中度择伐要15 a才能恢复,采伐强度越高,恢复所需要的年限越长。若考虑伐木制品的碳储量,则中度择伐需要10 a才能恢复到伐前,强度和极强度择伐需要15 a才能恢复,皆伐恢复较为困难,15 a后的碳储量仅为伐前的42.98%。从碳汇角度出发,闽北天然次生林宜采用中度以下的择伐。
Scientifically and rationally measuring harvesting has important practical significance for the protection of forest carbon storage, which has drawn more and more attention. Based on the long-term monitoring of selective cutting and regeneration research base of natural secondary forest in northern Fujian, the effects of different intensity harvesting on ecosystem carbon pool were analyzed based on the carbon storage and carbon emission of harvested wood products. The results showed that only from the biomass layer of tree layer, the 10-year-old carbon sequestration had exceeded the pre-cutting and moderate-selcted cutting for 15 years to recover, and the higher the harvesting intensity, the longer the recovery period. Considering the carbon storage of harvested wood products, it took 10 years for moderate selective cutting to restore to pre-cutting level, 15 seconds for intensive and intensive selective cutting to recover, and more difficult for clear-cut recovery. After 15 years, Before the 42.98%. From the carbon sequestration point of view, the natural secondary forests in northern Fujian should adopt the following moderate cutting.