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以土壤图、地形图、全钾图等资料为数据源,利用ArcGIS 9.2建立广东省赤红壤DEM,提取海拔高度、坡度、坡向和地势起伏度,探索大尺度下全钾分布与地形因子的关系。研究表明:全钾含量与海拔高度、坡度和地势起伏度相关程度很高,并随这些地形因子的上升分布面积迅速下降,并呈现倒数形式;在坡向上,主要分布于平坦区域和东南坡。研究结果直接证明地形是土壤形成发育的重要因素,影响土壤全钾的积累及转化。
Based on the data of soil map, topographic map and total potassium map, ArcGIS 9.2 was used to establish DEM of latosolic red earth in Guangdong Province. The altitude, slope, aspect and undulation of the topography were extracted to explore the effects of total potassium distribution and topographical factors relationship. The results showed that the content of total potassium was highly correlated with altitude, slope and topographic relief, and declined rapidly with the rise of these terrain factors, and showed a reciprocal form. In the aspect of slope, it was mainly distributed in the flat area and the southeast slope. The results directly prove that the terrain is an important factor for soil formation and development, affecting the accumulation and transformation of soil total potassium.