黄花甸子流域人工林土壤有机碳密度分布特征

发布时间：2018-08-07 09:41

【摘要】：【目的】分析内蒙古黄花甸子流域不同人工林土壤有机碳密度分布特征,为该地区人工林生态系统的碳汇管理提供理论依据。【方法】以内蒙古赤峰市敖汉旗黄花甸子流域内山杏×油松混交林、山杏林、小叶杨林、柠条林4种典型人工林为研究对象,选取典型样区,探讨了0~100cm土层不同林分土壤有机碳密度的变化。【结果】4种林分土壤平均有机碳密度为0.85~1.07kg/m2;土壤有机碳密度呈现出混交林明显高于纯林,乔木林明显高于灌木林的特征,土壤平均有机碳密度由大到小表现为山杏×油松混交林山杏林小叶杨林柠条林。土壤有机碳富集在0~20cm土层中,并随土层深度的增加,土壤有机碳密度明显降低。【结论】在研究区的造林实践中,建议增加混交林造林面积,减少人类活动对森林表层土壤的干扰和破坏。
[Abstract]:[objective] to analyze the soil organic carbon density distribution characteristics of different plantations in Huanghuadian Valley, Inner Mongolia. [methods] A mixed forest of apricot 脳 Pinus tabulaeformis, almond forest and poplar forest in the Huanghua Dianzi watershed of Aohan Banner, Chifeng City, Inner Mongolia, was used to provide theoretical basis for the management of carbon sequestration in the artificial forest ecosystem. Four typical plantations of Caragana korshinskii forest were selected as the research object. The change of soil organic carbon density of different stands in 0~100cm soil layer was studied. [results] the average soil organic carbon density of four stands was 0.85 ~ 1.07kg / m ~ (2). The soil organic carbon density of mixed forest was obviously higher than that of pure forest, and that of Arbor forest was obviously higher than that of shrub forest. The average soil organic carbon density from large to small is the apricot 脳 Pinus tabulaeformis mixed forest, apricot forest, Yang Lin Caragana forest. Soil organic carbon was enriched in 0~20cm soil layer, and soil organic carbon density decreased obviously with the increase of soil depth. [conclusion] in the afforestation practice of the study area, it is suggested to increase the afforestation area of mixed forest. Reduce human activities on the forest surface soil disturbance and destruction.
【作者单位】：内蒙古农业大学生态环境学院;
【基金】：内蒙古应用研究与开发计划项目“农林牧耦合生态系统固碳关键技术”(20110732)
【分类号】：S714.2

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