| 基于Meta-analysis的中国干旱半干旱区土地利用变化的土壤碳氮效应研究 |
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| 引用本文： | 巩杰,王玉川,谢余初,赵彩霞.基于Meta-analysis的中国干旱半干旱区土地利用变化的土壤碳氮效应研究[J].安徽农业科学,2011,39(14):8408-8411,8419. |
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| 作者姓名： | 巩杰 王玉川 谢余初 赵彩霞 |
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| 作者单位： | 兰州大学西部环境教育部重点实验室; |
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| 基金项目： | 国家自然科学基金项目(40801038,40721061); 中国博士后科学基金项目(20080430790) |
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| 摘 要： | 通过整合分析方法,对中国干旱、半干旱区农田、林地、灌丛和草地4种土地利用方式下地表土壤有机碳、氮含量进行了定量分析。结果表明,不同土地利用方式对表土碳、氮含量影响显著;草地转化为农田将降低土壤有机碳、全氮含量（-60.9%和-54.3%）,草地转化为林地将导致土壤有机碳、全氮含量的降低（-21.5%和-31.3%）;草地转化为灌木林地将增加土壤有机碳含量（＋33.6%）和降低土壤全氮含量（-5.9%）。可见,受人类活动干扰最为强烈的农田的土壤有机碳、全氮含量最低,而草地、灌木林地具有较好的土壤肥力和土壤质量保持功能。因此,开展灌草植被恢复和农田弃耕（自然恢复）可有效改善土壤肥力和增加土壤碳、氮存贮
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| 关 键 词： | 土地利用变化 土壤有机碳 土壤氮 干旱半干旱区 Meta--analysis |
Study on Soil C and N Effect of Land Use Change in Arid and Semi-arid Area of China Based on Meta-analysis |
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| GONG Jie et al.Study on Soil C and N Effect of Land Use Change in Arid and Semi-arid Area of China Based on Meta-analysis[J].Journal of Anhui Agricultural Sciences,2011,39(14):8408-8411,8419. |
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| Authors: | GONG Jie |
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| Institution: | GONG Jie et al(Key Laboratory of Western China's Environmental Systems,Lanzhou University,Lanzhou,Gansu 730000) |
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| Abstract: | Through integrating analytical method,quantitative analysis was carried out for soil organic carbon and nitrogen content based on four land use ways,namely cropland,forestland,shrubland and grassland.The results indicated that different land use types have significant effects on soil C and N storage;soil C and N decline after land use changes from grassland to cropland(-60.9% and-54.3%),grassland to forest(-21.5% and-31.3%).Grassland changed into shrubland causes an increase of soil C stocks(+33.6%) and a d... |
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| Keywords: | Land use change Soil organic carbon Soil nitrogen Arid and semi-arid area of China Meta-analysis |
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