[目的]采取措施缓解宜昌市土壤酸化现状,提高烟叶质量.[方法] 对宜昌市植烟土壤1832个土样进行田间调查和土样化验分析,测定其pH值及各种离子含量.[结果]宜昌市植烟土壤徽酸性、强酸性和极强酸性面积已达76.23%,泥质岩土壤与石英质岩土壤下降值相同,土壤pH值与阳离子交换量呈正相关性,土壤酸化早期速效钾增加,后期速效钾含量下降.[结论] 降雨量大,施肥不当及土壤中有效态硫的过高含量是导致土壤酸化的主要原因,施用石灰、施用腐熟有机肥料、施用生理碱性肥料可阻止和减缓土壤酸化.%[ Objective ] The current situation of the soil acidification in the Yichang city would be alleivated for the improvement of tobacco leaf quality through the adoptability of some measurements. [ Method] The in field survey and soil sample laboratory analysis results show:Yichang city emblem acidic soil, strong acid and extremely strong acidic area reached 76.23％, mudstone soil and quartz rock fall in value the same soil, soil pH and cation exchange capacity follow a dependency, soil acidification early available potassium increases late kalium de cline. Improper rainfall, fertilization and soil available too high content of sulfur is the main cause of soil acidification, soil pH and effective States follow a correlation, but suffur soil pH and exchangeable calcium content, exchangeable calcium content and available sulphur into negative correlation. Lime, composfing organic fertilizer and fertilizer raw buried alkaline fertilizer er can prevent and alleviate soil acidification.
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