燕山南部典型农业区土壤有机碳储量及影响因素研究

Study on Soil Organic Carbon Storage and Influencing Factors of Typical Agricultural Areas of Southern Yanshan Mountains

土壤有机碳是土壤肥力乃至土壤质量的重要基础物质,了解其分布及驱动因子对农业发展具有重要意义。以唐山遵化市西部典型农业区为例,根据实验数据,探究其土壤有机碳分布及影响因子。结果显示,(1)研究区有机质含量较差,指标均表现为中等变异,存在明显的空间正相关性,且存在不同程度的空间变异性。(2)遵化市西部土壤有机碳分布表现为北低南高的分布,其0~30 cm表层土壤的碳储量约为4.377 Tg。(3)土壤有机碳密度的影响因素中,有效磷和有机质是土壤特性主要影响因素,年均气温、海拔、年均降水和NDVI是地形因子主要影响因子。综合来看,研究区土壤有机碳表现出明显的空间差异性,且受到多种因素影响,应注重对土壤性质的动态监测。

Soil organic carbon is an important basic substance for soil fertility and even soil quality.Understanding its distribution and driving factors is of great significance for agricultural development.Taking the typical agricultural area in the west of Zunhua City of Tangshan as an example,the distribution of soil organic carbon and its influencing factors were explored according to the experimental data.The results show that(1) the organic matter content in the study area is poor,and the indicators show moderate variation,with obvious positive spatial correlation and varying degrees of spatial variability.(2) The distribution of soil organic carbon in the east of Zunhua is low in the north and high in the south,and the carbon storage of 0-30cm surface soil is about 4.377 Tg.(3) Among the influencing factors of soil organic carbon density,available phosphorus and organic matter were the main influencing factors of soil characteristics,while average annual precipitation and NDVI are the main influencing factors of topographic factors.In summary,soil organic carbon in the study area show obvious spatial differences and is affected by many factors,so the dynamic monitoring of soil properties should be paid more attention.