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在生物量调查的基础上,对桂西南地区28年生米老排人工林生态系统的碳素积累特征及分配格局进行了研究。结果表明:米老排各器官碳含量在522.8～560.2g·kg-1,大小排序为:树叶(560.2g·kg-1)>树干(542.8g·kg-1)>树根(530.9g·kg-1)>树皮(530.8g·kg-1)>树枝(522.8g·kg-1);土壤碳含量以表土层最高,且随土层深度的增加而降低;米老排人工林乔木层碳贮量为147.90t·hm-2,其中,树干占乔木层碳贮量的63.72%;米老排人工林生态系统碳贮量为285.36t·hm-2,各组分的分配顺序为乔木层>土壤层>凋落物层>灌木层>草本层;植被层碳贮量为土壤层(0～100cm)的1.1倍。
Based on the biomass survey, the carbon accumulation characteristics and distribution patterns of 28-year old rice plantation ecosystem in southwestern Guangxi were studied. The results showed that the carbon content of each organ was between 522.8 and 560.2 g · kg-1, with the order of leaf size of 560.2 g · kg -1> 542.8 g · kg -1 · tree root · 530.9 g · kg-1)> bark (530.8g · kg-1)> branch (522.8g · kg-1). Soil carbon content was the highest in surface soil layer and decreased with the depth of soil layer. The carbon storage of the layer was 147.90t · hm-2, of which the trunk accounted for 63.72% of the carbon storage in the arbor layer. The carbon storage of the plantation was 285.36t · hm-2. The distribution order of the components was Tree layer> Soil layer> Litter layer> Shrub layer> Herb layer. The carbon storage of vegetation layer was 1.1 times that of soil layer (0 ~ 100cm).