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应用GIS技术,综合统计学和地统计学方法,探讨了浑河太子河流域表层土壤养分的空间分布,同时分析了地形因子、土地利用及其交互作用对土壤养分空间变异的影响。结果表明:海拔、坡度与土壤有机质、全氮、全磷呈极显著正相关,与全钾呈极显著负相关;坡向的影响不显著。林地和草地的有机质、全磷平均含量相对较高;水田和旱地的全钾平均含量较高。地形因子与土地利用方式的交互作用显著影响土壤养分含量。有机质、全氮和全磷含量高的区域集中在海拔较高、坡度较大的林地和草地。地形条件和土地利用方式能够解释研究区土壤养分的空间变异。
The spatial distribution of surface soil nutrients in Taizi River basin of Hunhe River was discussed by using GIS technology, comprehensive statistics and geostatistics methods. At the same time, the influence of topographical factors, land use and their interaction on soil nutrient spatial variability was analyzed. The results showed that there was a significant positive correlation between elevation and slope and soil organic matter, total nitrogen and total phosphorus, and significant negative correlation with total potassium. The slope had no significant effect. The average content of organic matter and total phosphorus in woodland and grassland is relatively high; the average content of total potassium in paddy field and dry land is higher. The interaction of topographical factors and land use patterns significantly affects soil nutrient content. Areas with high organic matter, total nitrogen and total phosphorus concentrations are concentrated in forest land and grassland with higher elevation and steeper slope. Topographical conditions and land use patterns can explain the spatial variability of soil nutrients in the study area.