为综合评价湖南湘西植烟土壤肥力指标,探索湘西烟叶生产适宜施肥方法,利用了模糊数学统计方法和相关性分析,对488个土壤样品的10项营养指标进行了土壤肥力综合评价.结果表明:湘西烟区土壤的综合肥力水平(IFI)、pH值、有机质、全氮、全磷、全钾、有效硫及水溶性氯含量均在适宜水平,碱解氮、有效磷含量较高,有效钾、水溶性氯等含量存在区域性变异,并提出以控氮、增钾、减氯、适量补充有机肥为原则的平衡施肥方法.%In order to comprehensively evaluate the fertility index of tobacco-growing soils in Xiangxi Autonomous Region of Hunan Province and investigate proper fertilization methods for tobacco production of Xiangxi,fuzzy statistics method and correlation analysis were adopted to make synthetic evaluation of soil fertility,analyzing 10 nutritive indexes from 488 soil samples. The results of evaluation showed that integrated fertility index (IFI),pH value,content of organic matter,total nitrogen(TN),total phosphorus(TP),total potassium(TK),available sulfur and water-soluble chloride of soil in tobacco growing areas of Xiangxi were all on optimal level,and that alkaline-soluble nitrogen and available phosphorus in content are higher, and that there was a regional variability of the content of available potassium and water-soluble chloride. It proposed approaches of balanced fertilization based on principles of controlling nitrogen,increasing potassium,decreasing chloride and providing appropriate supplementation of organic fertilization.
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