| 近25a珠江北江上游土壤表层有机碳储量变化及固碳潜力估算——以广东省翁源县为例 |
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| 引用本文： | 张正栋,杨春红.近25a珠江北江上游土壤表层有机碳储量变化及固碳潜力估算——以广东省翁源县为例[J].资源科学,2013,35(4):809-815. |
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| 作者姓名： | 张正栋 杨春红 |
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| 作者单位： | 华南师范大学地理科学学院,广州,510631 |
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| 基金项目： | 十二五国家科技支撑计划课题(编号:2012BAJ22B06);广东省自然基金项目(编号:9151063101000046);广东省软科学项目(编号:2009B70300115);华南师范大学学术骨干与团队培养专项(编号:G21053)。 |
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| 摘 要： | 本文基于土壤类型法,借助ArcGIS9.3工具,对珠江北江上游广东省翁源县的土壤表层有机碳储量及其时空分布进行了分析,并采用最大值法估算其主要土壤类型的有机碳增加潜力.结果显示,翁源县土壤表层平均有机碳密度与全国平均值接近,且近25a来略有下降趋势；水稻土表层有机碳密度上升幅度最大,“碳汇”效果明显；山地和旱地土壤表层表现出“碳源”的效应,水田则表现出“碳汇”的效应；土壤有机碳密度空间分布相对较高的是县域西北部和滃江流域；紫色土的固碳潜力最大,菜园地的固碳潜力最小,固碳潜力高值区主要位于漆江流域及其他耕地地区.在土壤类型和土地利用类型的基础上从时间和空间角度上分析翁源县土壤表层有机碳储量及固碳潜力,研究结果可以为区域农业生产活动、农业政策和碳平衡分析提供参考,同时对估算大尺度的土壤碳储量具有重要意义.
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| 关 键 词： | 土壤有机碳 时空分布 固碳潜力 珠江 |
Variations in Soil Organic Carbon Storage and the Potential for Carbon Sequestration by Topsoil Over 25 Years |
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| ZHANG Zhengdong and YANG Chunhong.Variations in Soil Organic Carbon Storage and the Potential for Carbon Sequestration by Topsoil Over 25 Years[J].Resources Science,2013,35(4):809-815. |
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| Authors: | ZHANG Zhengdong and YANG Chunhong |
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| Institution: | School of Geography , South China Normal University, Guangzhou 510631, China;School of Geography , South China Normal University, Guangzhou 510631, China |
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| Abstract: | Here, we analyze the storage quantity of organic carbon and the temporal and spatial distribution of topsoil in North River upstream of the Pearl River in the town of Wengyuan using ArcGIS9.3. We found that the average soil organic density of the town of Wengyuan is almost close to the average level of organic density nationwide, and has been in decline. The increase in the carbon density of paddy soil is larger than for other soil types. The mean soil organic density of mountain land and dry land had been decreasing. The high value region, which has a high organic carbon density, is located in the northwest of the town of Wengyuan and the Wengjiang River valley. The developing potential of carbon sequestration of purple soil is the greatest, while the developing potential of carbon sequestration of the vegetable garden is smallest. The high-valued region with the developing potential of carbon sequestration of topsoil is mainly located in the Wengjiang River valley and some other cultivated areas. These findings provide some reference for holding regional agriculture activity and forming agricultural policy and analyzing carbon balance. |
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| Keywords: | Soil organic carbon Temporal and spatial distribution Potential of carbon sequestration The Pearl Rive |
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