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对江西安福毛竹林类型(毛竹纯林、竹阔混交林和竹杉混交林)土壤有机碳特征进行研究,以中亚热带常绿阔叶林和杉木纯林为对照。结果表明,土壤有机碳含量以竹阔混交林最高(15.36g/kg),竹杉混交林次之(14.63g/kg),毛竹纯林最小(14.06g/kg)。不同类型毛竹林土壤有机碳含量在不同季节存在差异,在土壤剖面上均表现为随土层深度的增加而降低。毛竹林土壤有机碳储量在116.90~130.24tC/hm2。不同类型毛竹林土壤有机碳存在着明显的表层富集现象,0~40cm土层土壤碳储量占整个林地土壤碳储量比例大于75%。毛竹林土壤层是一个较大的碳库,而竹阔混交经营能够有效提高土壤碳贮存能力。
Soil organic carbon characteristics of the bamboo forests of Anfu, Jiangxi Province (mixed forest of pure bamboo, mixed broadleaved forest and mixed forest of bamboo and broadleaved tree) were studied. The comparison was made between the subtropical evergreen broad-leaved forest and Chinese fir plantation. The results showed that the soil organic carbon content was the highest (15.36g / kg) in the mixed forest of bamboo and broadleaf, the next (14.63g / kg) in the mixed forest of the fir and the smallest (14.06g / kg) in the pure forest of the bamboo. The soil organic carbon content of different types of Moso bamboo forest varied in different seasons, and both decreased in the soil profile with the increase of soil depth. The soil organic carbon storage in Moso Bamboo Forest ranged from 116.90 to 130.24tC / hm2. Soil organic carbon in different types of Phyllostachys pubescens forest had obvious surface enrichment. Soil carbon storage in 0 ~ 40cm soil layer accounted for more than 75% of the total carbon storage in forest soil. The soil layer of Phyllostachys pubescens forest is a large carbon pool, and mixed management of bamboo and broad mulch can effectively improve the carbon storage capacity of the soil.