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针对丘陵山区复杂地形条件对植烟土壤肥力空间分布带来的影响,以重庆黔江区6种主要植烟土壤肥力要素为研究对象,选择地形因子作为辅助数据,在GIS平台下采用回归克里格法分析该区植烟土壤养分空间分布特征并在此基础上利用模糊综合评价法对植烟土壤养分适宜性进行综合评价.结果表明:黔江植烟土壤pH、有机质、速效氮、速效钾和水溶性氯含量适宜,速效磷含量偏低.从总体趋势来看,黔江植烟土壤以酸性、弱酸性为主,pH值呈现出从南到北逐渐降低趋势;有机质含量较为丰富,从东到西逐渐降低;速效氮含量主要从南到北逐渐降低;速效磷含量从东向西逐渐降低,总体含量相对偏低;速效钾含量除中部零星地区偏低外,其余地区均相对较高;水溶性氯含量则呈现出东南、北部高于其他地区的趋势.结果表明,土壤养分适宜性指数为优的区域占研究区域总面积的9.35%,为良的区域占44.2%,为中等的区域占34.65%,为一般和差的区域仅占10.05%和1.74%.
Aiming at the influence of complex terrain conditions on the spatial distribution of tobacco soil fertility in mountainous areas, the fertility elements of six major tobacco-growing areas in Qianjiang District of Chongqing were selected as the research object. Topographic factors were selected as auxiliary data, Method was used to analyze the spatial distribution characteristics of soil nutrients in tobacco growing area and the fuzzy comprehensive evaluation method was used to evaluate the soil nutrient suitability of tobacco planting soil.The results showed that soil pH, organic matter, available nitrogen, available potassium and water soluble The suitable chlorine content and available phosphorus content are low.From the general trend, the soil of tobacco planting in Qianjiang is mainly acidic and weakly acidic, the pH value shows a decreasing trend from south to north, and the content of organic matter is relatively abundant, from east to west The content of available phosphorus gradually decreased from south to north; the content of available phosphorus decreased gradually from east to west, the overall content was relatively low; the content of available potassium was relatively high except for the sporadic central part; the water soluble The content of chlorine in the southeast and the northern part of the study area is higher than that in other areas.The results show that the area with good soil nutrient suitability index accounts for 9.35 % For good areas, 44.2% for good areas, 34.65% for medium areas and only 10.05% and 1.74% for normal and poor areas.