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对中国东南部亚热带常绿阔叶次生林采取三种不同的管理方案,包括不采伐(NL)、前期间伐(ESL)、后期间伐(LSL),研究森林碳的分配、总的碳储量以及植被多样性的交互关系。结果表明:1在三种不同处理中,森林各部分的碳储量有所不同,乔木层碳、林下植被、根系、100cm表层土所含碳分别占森林总碳储量的29.75%~47.56%、0.17%~0.51%、2.22%~2.66%、49.87%~67.08%;不同管理措施林分的碳储量不尽相同,自然生长(NL)的林分碳储量为294.33±35.40Mg/hm~2,前期采伐干扰(ESL)的林分碳储量为371.12±61.49Mg/hm~2,后期采伐干扰(LSL)的林分碳储量为334.11±70.34Mg/hm~2;2乔木层碳储量与其多样性呈正相关,解释了12.39%和12.40%的Shannon和Simpson多样性指数。可见,择伐和保持乔木层多样性有利于提高亚热带常绿阔叶次生林的碳汇能力。
Three different management schemes were applied to the subtropical evergreen broad-leaved secondary forest in southeastern China, including NL, ESL, LSL, forest carbon allocation, total carbon storage and vegetation Diversity of interaction. The results showed as follows: 1 Among the three treatments, the carbon stocks of different parts of the forest were different. Carbon in tree layer, understory vegetation, root system and 100cm topsoil respectively accounted for 29.75% -47.56% of the total forest carbon storage, 0.17% ~ 0.51%, 2.22% ~ 2.66% and 49.87% ~ 67.08%, respectively. The carbon stocks of stands under different management measures were different. The natural carbon stocks of stands (NL) were 294.33 ± 35.40Mg / The stand carbon storage of early tree harvesting disturbance (ESL) was 371.12 ± 61.49Mg / hm ~ 2, and the post-harvest logging disturbance (LSL) forest carbon storage was 334.11 ± 70.34Mg / hm ~ 2. Was positively correlated, accounting for 12.39% and 12.40% Shannon and Simpson index of diversity. Therefore, selective cutting and maintaining the diversity of arbor layer can enhance the carbon sink ability of subtropical evergreen broad-leaved secondary forest.