安徽省郎溪县土壤养分空间分布特征及影响因素研究

Study on Spatial Distribution Characteristics and Influencing Factors of Soil Nutrients in Langxi County

摘要:

为揭示安徽省郎溪县土壤养分空间变异规律，明确其空间分布格局与关键驱动因素，该研究基于传统统计学、地理信息系统（GIS）和地理探测器模型，系统分析了郎溪县 4 054 件表层土壤样品中氮、磷、钾、有机质、硼、锰、硒和钼共8项养分指标含量特征、空间分布格局及其变异的主导影响因素。结果显示，各养分指标均呈中等变异程度。其中，土壤氮、磷和有机质的空间分异主要受土地利用类型控制，钾和硼的空间分布则主要由地质背景主导，锰的空间变异受地形与土地利用类型的协同作用影响，而硒和钼的空间分异则受地质背景、地形条件及土地利用类型三者共同作用。

Abstract:

In order to reveal spatial variation of soil nutrients in Langxi county in Anhui province, and clarify spatial distribution patterns and key driving factors, based on traditional statistics, geographic information systems (GIS), and geographic detector models, the content characteristics, spatial distribution patterns and dominant influencing factors of eight nutrient indicators, including nitrogen, phosphorus, potassium, organic matter, boron, manganese, selenium and molybdenum in 4054 surface soil samples from Langxi county have been analyzed systematically. It is showed that all nutrient indicators exhibit moderate variability. The spatial differentiation of soil nitrogen, phosphorus and organic matter is mainly controlled by land use types. The spatial distribution of potassium and boron is mainly dominated by geological background. The spatial variation of manganese is influenced by synergistic effect of terrain and land use types. The spatial differentiation of selenium and molybdenum is influenced by a combination of geological background, topographical conditions and land use types.