| 皖北平原蒙城县农田土壤有机碳空间变异及影响因素 |
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| 引用本文： | 马渝欣,李徐生,李德成,韩志勇,张甘霖,张文凯,胡春华,邵云鹏.皖北平原蒙城县农田土壤有机碳空间变异及影响因素[J].土壤学报,2014,51(5):1153-1159. |
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| 作者姓名： | 马渝欣 李徐生 李德成 韩志勇 张甘霖 张文凯 胡春华 邵云鹏 |
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| 作者单位： | 南京大学地理与海洋科学学院,南京大学地理与海洋科学学院,土壤与农业可持续发展国家重点实验室中国科学院南京土壤研究所,南京大学地理与海洋科学学院,土壤与农业可持续发展国家重点实验室中国科学院南京土壤研究所 |
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| 基金项目： | 中国科学院战略性先导科技专项(XDA05050503)和国家科技基础性工作专项(2008FY110600) |
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| 摘 要： | 以皖北平原典型农业生产大县亳州市蒙城县为代表,运用统计学、地统计学方法和GIS技术研究了其农田耕作层(0～20 cm)土壤有机碳(SOC)含量的空间分布及其影响因子。结果表明:研究区SOC含量为10.41±2.52 g kg-1,近30年来提高了55.61%,SOC变异系数为24%,属于中等变异程度。SOC含量在空间分布上表现为东北部、中部和西南部含量高,由西北向东南先逐渐增加后逐渐降低,变异程度较高。整个县域范围内SOC空间变异的主要影响因素为土壤机械组成(粉粒和砂粒含量),其次为秸秆还田。
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| 关 键 词： | 土壤有机碳 空间变异 影响因素 |
| 收稿时间： | 2013/3/12 0:00:00 |
| 修稿时间： | 2014/3/13 0:00:00 |
Spatial variation of soil organic carbon content in farmland and its influencing factors in Mengcheng County, Northern Anhui Plain |
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| Ma Yuxin,Li Xusheng,Li Decheng,Han Zhiyong,Zhang Ganlin,Zhang Wenkai,Hu Chunhu and Shao Yunpeng.Spatial variation of soil organic carbon content in farmland and its influencing factors in Mengcheng County, Northern Anhui Plain[J].Acta Pedologica Sinica,2014,51(5):1153-1159. |
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| Authors: | Ma Yuxin Li Xusheng Li Decheng Han Zhiyong Zhang Ganlin Zhang Wenkai Hu Chunhu and Shao Yunpeng |
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| Affiliation: | School of Geographic and Oceanographic Sciences, Nanjing University,School of Geographic and Oceanographic Sciences, Nanjing University,State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences,School of Geographic and Oceanographic Sciences, Nanjing University,State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences |
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| Abstract: | A total of 550 topsoil samples were collected from farmlands in Mengcheng County, a typical area of the Northern Anhui Plain for determination of soil organic carbon (SOC) content and further analysis of its spatial distribution and variability in the area in 2011 by means of statistics, geostatistics and geographical information system (GIS) technology. Results show that SOC contents in the farmlands ranged from 4.04 to 21.98 g kg-1 with an average of 10.41 g kg-1, and an variation coefficient of 24.12%, moderate in variation degree. The SOC semivariance model was a spherical one. Moreover a strong spatial autocorrelation of SOC content was observed. In spatial distribution SOC contents were generally high in the northeast, central and southwest parts of the county and varied sharply within the scope of the county, showing a trend starting from the northwest of gradually rising and then gradually declining towards the southeast, such a spatial variation was attributed mainly to mechanical composition (silt and sand) of the soil and then incorporation of straw. |
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| Keywords: | soil organic carbon(SOC) spatial variability influencing factor |
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