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天山北麓不同土地覆被下土壤有机碳垂直分布特征

, PP. 913-918

Keywords: font-family,宋体,mso-bidi-font-family,宋体,mso-font-kerning,1.0pt,mso-ansi-language,EN-US,mso-fareast-language,ZH-CN,土地覆被')",mso-bidi-language&searchField=keyword">href="#">mso-bidi-language,土地覆被&searchField=keyword">AR-SA">土地覆被,土壤有机碳,垂直分布,天山北麓

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Abstract:

利用全国第二次土壤普查数据,对天山北麓不同土地覆被类型下的土壤有机碳分布特征开展研究。结果表明在0~100cm土层天山北麓不同土地覆被类型的土壤碳密度差异显著,其均值处于3.65~35.73kg·m-2。不同土地覆被类型的土壤碳密度垂直分布差异明显,其中耕地表层(0~20cm)土壤碳密度占其总量的32.2%,其相邻土层的土壤碳密度占其总量比例的差值较小,最大差值仅为8.1%;高山亚高山草甸、森林和隐域植被表层(0~20cm)土壤碳密度占其总量的40%以上;荒漠植被、裸地和稀疏植被表层(0~20cm)土壤碳密度占其总量的比例低于37%,其中裸地与稀疏植被最低,仅为25.4%,其相邻土层土壤碳密度占其总量比例的最大差值低于4.0%。

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