论文部分内容阅读
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。
Using GPS technology, large-scale soil sampling was carried out on the basic tobacco fields in Wenshan Prefecture. The overall characteristics and spatial variability of soil nutrient status were studied. Spatial distribution maps of soil nutrients were drawn by ordinary interpolation. The results showed that with the elevation increasing, the soil pH value decreased significantly. The content of soil organic matter and alkali-hydrolyzable nitrogen increased extremely significantly while the available phosphorus content increased first and then decreased. The content of soil organic matter and alkali-hydrolyzable nitrogen in the whole state tended to increase from north to south and from east to west. The available potassium content in the soil tended to increase from the central part to the north and the south, and the spatial distribution of soil pH and available phosphorus Not obvious.