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植被恢复对土壤有机碳库的稳定和全球碳平衡产生重要影响.以马尾松(Pinus massoniana)人工林土壤为研究对象,采用湿筛法分离团聚体并测其有机碳含量,探讨植被恢复对土壤团聚体的影响.结果表明裸地的植被恢复显著促进了土壤表层有机碳的积累,尤其是在土壤0~10 cm土层,分别为未治理地(CK)的2.6~7.9倍和2.8~9.6倍.植被恢复影响团聚体有机碳分配并显著(P<0.05)影响其有机碳含量.大团聚体具有有机碳富集作用,其有机碳恢复速度明显比微团聚体、粉粒与粘粒快,而增加的有机碳含量79.6%~90.4%储存在大团聚体,7.2%~14.0%储存在微团聚体,2.4%~6.4%储存在粉粒与粘粒.
Vegetation restoration has an important impact on the stability of soil organic carbon pool and global carbon balance.Under the Pinus massoniana plantation soil as the research object, the wet-sieving method was used to separate the aggregates and measure the organic carbon content, and to explore the effects of vegetation restoration on the soil The results showed that vegetation recovery in bare land significantly promoted the accumulation of organic carbon in soil surface, especially in the 0-10 cm soil layer, which was 2.6-7.9 folds and 2.8-9.6 folds of uncured soil (CK) The recovery of SOC affected the distribution of organic carbon in the aggregates and significantly affected the organic carbon content (P <0.05). Large aggregates had the effect of organic carbon enrichment, and their organic carbon recovery rates were significantly faster than those of microaggregates, silt and clay , Whereas the increased organic carbon content was 79.6% to 90.4% stored in macroaggregates, 7.2% to 14.0% stored in microaggregates and 2.4% to 6.4% stored in silt and clay.