【摘要】 土壤肥力是影响作物单产的主要因素,也是耕地分级的重要依据。选择海拔、坡度、耕层厚度、pH值、有机质、全氮、速效磷、速效钾共8个评价指标,用改进层次分析法确定指标权重,以模糊数学理论为基础,在ArcGIS8.3和ArcView3.3平台上,实现贵州省普安县耕地土壤肥力可视化评价,并分析县域土壤肥力空间分布差异,为土壤培肥、治理、耕地分级和退耕还林还草科学决策提供依据。更多还原

【Abstract】 The soil fertility is an important factor, which not only attecting production of crop, but also the classification of cultivated land. In this article, factors attect the soil tertility were chosen. which inclading elevation, slope, pH, total nitrogen, available phosphorus, available potassium and so on. Improved AHP was used to work out the weights of each factor, and a fuzzy evaluation model on the basis of ArcGIS8.3 and ArcView3.3 was built to make the visual evaluation of plowland in Puan county of Guizhou come true. At last, the spatial distribution of the soil fertility in Pu`an county was analyzed, which may be helpful to make scientific decision.更多还原