| 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0～100 cm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0.85～1.07 kg/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 0～20 cm 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。 |
| 关键词: 人工林 土壤有机碳密度 土层 |
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| 基金项目: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） |
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| Distribution characteristics of soil organic carbon density of different forests in Huanghuadianzi watershed |
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LI Long,YAO Yun-feng,QIN Fu-cang,et al
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| Abstract: |
| 【Objective】This study analyzed the distribution characteristics of soil organic carbon (SOC) density in different plantations in Huanghuadianzi watershed to provide theoretical basis for management of carbon sink in plantation ecosystem.【Method】Four different forest plantations,Prunus sibirica×Pinus tabulaeformis,Prunus sibirica,Populus simonii and Caragana intermedia in Huanghuadianzi watershed,Aohan,Chifeng of Inner Mongolia were selected to investigate the distribution characteristics of SOC density at the depth of 0-100 cm.【Result】Average density of SOC in four forest types was 0.85-1.07 kg/m2.SOC density of mixed forest was significantly higher than that of pure forest,and SOC density of arbor forest was significantly higher than that of shrub forest.SOC mainly accumulated in the depth of 0-20 cm and it decreased significantly with the increase of soil depth.【Conclusion】It is suggested to increase the planting area of mixed forest and reduce the effects of human activities on disturbance and destruction of forest soil. |
| Key words: plantation soil organic carbon density layer |
