基于GIS的皖北县域土壤养分空间变化研究

Spatial Variation of Soil Nutrients in Northern Anhui County Based on GIS

以安徽省测土配方项目所得的各县市土壤养分含量数据为研究基础,利用GIS地统计、分层分类等技术,研究了皖北地区县域土壤养分中全氮、有机质、有效磷、速效钾的空间分布差异。结果表明,皖北地区各县市的土壤养分含量具有明显的空间分布规律,整体上呈现相近县区各类土壤养分含量相近,土壤养分含量空间渐变特征明显。速效钾、有效磷的渐变趋势与淮河的主要支流流向相似。蚌埠、淮南等区域有丘陵分布,其各类土壤养分含量均在中高等水平。

Based on the soil nutrient content data obtained from the soil measurement and formulation project in anhui province,the spatial distribution differences of total nitrogen,organic matter,available phosphorus and available potassium in soil nutrients in counties in northern anhui province were studied by using GIS geostatistics,stratification and classification techniques.It was found that the soil nutrient content of all counties and cities in northern anhui province has an obvious spatial distribution rule,and the soil nutrient content of all kinds of counties and regions is similar on the whole,and the soil nutrient content has an obvious spatial gradient.The trend of available potassium and available phosphorus is similar to that of main tributaries of huaihe river.There are hills in bengbu,huainan and other areas.