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根据我国第5次(1994～1998年)和第6次(1999～2003年)森林资源清查数据,估算了热带亚热带8个省区4种主要林型(马尾松林、杉木林、硬阔林和软阔林)5个林龄组的乔木层地上生物量碳(TABC)与碳积累速率(TNEP).结果表明:(1)4种林型的TABC均随着林龄的增长而增加,阔叶林(硬阔林和软阔林)各林龄组的TABC均大于针叶林(马尾松林与杉木林)相应林龄组的水平,并且这种差距随着林龄的增长而增大;(2)4种林型的TNEP均随着林龄的增长呈现先增大后减小的趋势.阔叶林成熟阶段的TNEP远高于该阶段针叶林的水平;(3)利用logistic回归曲线分别拟合4种林型的TABC与林龄的关系(P<0.01,R2>0.95),预测了2010～2050年各林型乔木层地上部分的碳储量,同时计算同期4种林型的乔木层地上部分年均碳增汇量分别为41.14(马尾松林)、31.53(杉木林)、75.50(硬阔林)和75.68(软阔林)gCm2a1.基于森林资源清查数据估算和logistic回归曲线模拟的结果均表明阔叶林是更强的碳汇,并且在演替后期具有更大的碳吸存能力.相比于针叶林,阔叶林是我国热带亚热带区域碳汇林的最佳选择.
According to the inventory data of the fifth (1994 ~ 1998) and the sixth (1999 ~ 2003) forest resources in China, four major forest types (Pinus massoniana, Cunninghamia lanceolata, (TABC) and carbon accumulation rate (TNEP) in five stands were studied.The results showed that: (1) TABC of four forest types increased with the increase of stand ages The TABC in each age group was higher than that in the coniferous forest (Pinus massoniana and Cunninghamia lanceolata) in the forest stands, and the gap increased with age. (2) The TNEP of four forest types all increased first and then decreased with the increase of forest age.The TNEP in mature stage of broad-leaved forest was much higher than that of coniferous forest in this stage. (3) (P <0.01, R2> 0.95) of four forest types were respectively fitted to predict the carbon storage of above-ground part of arbor layer from 2010 to 2050. At the same time, the four kinds of forest types The annual average carbon sinks in the aerial part of the arbor layer were 41.14 (Pinus massoniana), 31.53 (Chinese fir), 75.50 (Hardwood) and 75.68 (Soft-shelled) gCm2a1, respectively. Based on forest inventory data and l The results of ogistic regression curve showed that broad-leaved forests were stronger carbon sinks and had greater capacity of carbon storage in late succession.Compared with coniferous forests, broad-leaved forests were carbon sink forests in the tropical and subtropical regions of China The best choice.