| 祁连山东段不同退化高寒草甸土壤有机碳密度研究 |
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| 引用本文： | 赵锦梅,高超,张德罡.祁连山东段不同退化高寒草甸土壤有机碳密度研究[J].草地学报,2010,18(1):21-25. |
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| 作者姓名： | 赵锦梅 高超 张德罡 |
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| 作者单位： | 1. 甘肃农业大学草业学院, 甘肃, 兰州, 730070;2. 甘肃农业大学林学院, 甘肃, 兰州, 730070 |
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| 基金项目： | 国际原子能机构项目(CPR/5/014)资助 |
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| 摘 要： | 于2008年在祁连山东段天祝地区选取轻度、中度和重度3个不同退化程度的高寒草地,以土壤有机碳密度为研究对象,探讨高寒草地在不同退化程度干扰下土壤有机碳密度的变化特征。结果表明:随着高寒草地退化程度的加重,土壤含水量降低,容重和pH值增大;土壤有机质和全氮有相似的变化趋势,中度与轻度或重度退化草地土壤有机质和全氮差异显著(P<0.05);土壤有机碳密度在0-10 cm土层显著高于其他土层(P<0.05),并随着土层加深有显著的垂直变化趋势;不同退化程度草地在0-30 cm土层总土壤有机碳密度表现为中度>轻度>重度退化草地。
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| 关 键 词： | 土壤有机碳密度 高寒草地 不同退化程度 |
| 收稿时间： | 2009-04-21 |
Study on the Soil Organic Carbon Density of Alpine Meadow with Different Degradation Degrees in Eastern Qilian Mountains |
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| ZHAO Jin-mei,GAO Chao,ZHANG De-gang.Study on the Soil Organic Carbon Density of Alpine Meadow with Different Degradation Degrees in Eastern Qilian Mountains[J].Acta Agrestia Sinica,2010,18(1):21-25. |
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| Authors: | ZHAO Jin-mei GAO Chao ZHANG De-gang |
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| Institution: | 1. Pratacultural College, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;2. College of Forestry, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China |
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| Abstract: | Alpine grassland degradation has an important impact on the carbon cycle of grassland ecosystems.To investigate the soil organic carbon density changes during different process of grassland degradation will have important theoretical value to the evaluation of alpine grassland soil carbon sequestration capacity and maintenance of climate change.The objective was mainly to discuss the variation characteristics of soil organic carbon density under the interference of grassland degradation.Three different degr... |
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| Keywords: | Soil organic carbon density Alpine grassland Different degradation degree |
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