基于GIS和地统计学的百色植烟土壤养分空间分析

【目的】分析百色植烟土壤养分空间分布特征,为优质烟叶生产布局提供理论依据。【方法】采用克里金（Kriging）插值法,对2006-2010年百色烟区植烟土壤pH、全氮、全磷、全钾、有效氮、有效磷、有效钾、阳离子交换量（CEC）、有机质、氯含量10个常规土壤养分指标进行空间插值分析。【结果】百色市植烟土壤中土壤有机质、全氮、全磷、全钾、氯、有效磷的空间相关性较高,有效氮和有效钾受随机因素的影响较大。结合优质烤烟生产要求,制定出百色烟区土壤养分适宜性分级标准,植烟适宜性初步分级,结果表明：百色土壤氯、钾含量较缺乏,其他土壤理化属性均处于适宜烤烟种植范围。【结论】百色大部分地区土壤适宜烤烟种植,但部分地区土壤pH、含氮量偏高,土壤钾、氯含量偏低,需在今后的生产中引起重视。

Spatial analysis of tobacco soil nutrients in Baise based on GIS and geostatistics

【Objective】Spatial characteristics of tobacco soil nutrients in Baise were studied to provide references for the layout of high quality tobacco production. 【Method 】Kriging was used to analyze soil pH,total nitrogen,total phosphorus,total potassium,available nitrogen,available phosphorus,available potassium,cation exchange capacity（CEC）,organic matter and chlorine content. 【Result】The results showed that effective phosphorus spatial correlation of soil organic matter, total nitrogen, total phosphorus, total potassium and chlorine was higher. The effective nitrogen and potassium were strongly influenced by random factors. Soil nutrient suitability classification standard was given and the soil was classified according to the classification standard and characteristics of spatial distribution of soil nutrients. The classification results showed that soil physical and chemical properties in Baise were suitable for flue-cured tobacco planting, but there were deficient chloride and potassium. 【Conclusion 】The majority soil of Baise is suitable for planting flue-cured tobacco. The region with low pH, potassium and chlorine content or high nitrogen should be paid special attention to.