文山州土壤养分空间分布与变化规律

Spatial Distribution and Variation Characteristics of Soil Nutrients in Wenshan Cultivated Soil

采用GPS定位技术,对文山州基本烟田进行大规模的土壤取样,研究了区域植烟土壤养分状况的总体特征、空间变异特征,并采用普通插值法绘制了土壤养分空间分布图。结果表明:随海拔的升高,土壤pH值呈显著下降的趋势,土壤有机质和碱解氮含量呈极显著增加趋势,而土壤有效磷含量呈先增加后下降的趋势。全州土壤有机质和碱解氮含量整体呈由北向南、由东向西有增加的趋势,土壤有效钾含量整体上呈由中部向北部及南部增加的趋势,土壤pH值和有效磷空间变化趋势不显著。

Large-scale soil sampling was carried out by GPS positioning technology in basic tobacco fields of wenshan Area, and descriptive analysis characteristics and spatial variation characteristics were studied. Spatial distribution maps for soil nutrient were made with ordinary Kriging interpolation method.Results show thatwith increasing altitude, value of pH significantly decrease, but the organic matter and alkaline hydrolysis nitrogen content show a significant increasing trend. While the available potassium content shows a downward trend after the first increase. The organic matter and alkaline hydrolysis nitrogen content showed an increasing trend from north to south and from east to west, the available potassium content showed an increasing trend from central to the north and south. The value of pH and the available phosphorus have no obvious spatial variation characteristics.