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(0~20cm)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。
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.
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. DOI:10.11766/trxb201303120111 Ma Yuxin, Li Xusheng, Li Decheng, Han Zhiyong, Zhang Ganlin, Zhang Wenkai, Hu Chunhu, 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.复制