慈竹林生态系统碳储量及其空间分配特征

Carbon Stock and Spatial Distribution Characteristics of Neosinocalamus affinis Forest Ecosystem

利用标准样方法研究了慈竹林生态系统的碳含量、碳储量以及空间分配特征，结果表明：慈竹各器官碳含量介于0．4600-0．5105g·g^-1之间，碳含量从高到低排序为竹秆〉竹根〉竹蔸〉竹枝〉竹叶；灌草与枯落物层碳含量为0．3724g·g^-1；土壤层有机碳含量以表层土（0～20cm）最大，为15．29g·kg^-1，并随土层深度的增加而减少；慈竹林生态系统碳储量为135．95t·hm^-2，其中乔木层碳储量为56．27t·hm^-2，占41．39％，土壤层（0-100cm）为74．07t·hm^-2，占54．48％，灌草与枯落物层最低，为5．61t·hm^-2，占4．13％；慈竹具有较强的固碳能力，其年固碳量为11．25t·hm^-2·^-1。

Carbon content, stock and spatial distributions characteristics of Neosinocalamus affinis forest ecosystem were studied by means of sample plot method. The results showed that carbon content of different organs ranged from 0. 4600 to 0. 5105 g.g^-1, which was in order as follow： trunk 〉 root 〉 bamboo pocket 〉 ranch 〉 leaf. The carbon content of shrub-herb and litter was 0. 3724 g.g^-1. The content of the soil organic carbon was decreased with the increase of soil depth and the content of topsoil （0- 20 cm） was biggest, and reached 15.29 g.kg^-1. The carbon storage of N. affinis forest ecosystem was 135.95 t.hm^-2, of which the arbor layer stored 56.27 t.hm^-2, accounted for 41.39 %, and storage of the soil layer （0-100 cm）reached 74.07 t.hm^-2 accounted for 54.48 %, the lowest storage was shrub-herb and litter layer, which stored 5.61 t.hm^-2, accounted for 4.13 % ; The ability of N. affinis carbon fixation was great, its annual carbon fixation amount was 11.25 t.hm^-2.a^-1.