凉山烟区植烟黄壤基础养分丰缺及综合评价

摘要

Based on the investigation of yellow soil fertility in Liangshan tobacco planting area , a com-prehensive evaluation system was established by fuzzy mathematics and partial correlation analysis , and the a-bundance or lack and distribution situations of each nutrient index were analyzed .The results showed that the contents of organic matter , rapid available phosphorus , exchangeable calcium and magnesium were abundant ;the content of rapid available potassium was medium;but the available nitrogen content was lower .The pH value of soil showed subacid and the texture was partial viscous .The soil fertility was classified into 5 groups of high ,rel-atively high, medium, relatively low and low based on the IFI value .The soil whose fertility was medium and a-bove occupied 82.27%.Above all , the yellow soil of Liangshan tobacco planting area showed higher compre -hensive nutrient index on the whole with the change range of 0.3274~1.0000 and the average value of 0.7417.%分析了凉山烟区植烟黄壤的肥力情况，采用模糊数学和偏相关分析的方法确立了黄壤的综合评价体系，并对各项养分指标进行了丰缺评价和分布分析。结果表明：凉山植烟黄壤整体上有机质含量丰富，碱解氮偏低，速效磷含量丰富，速效钾含量中等，pH显示为微酸性，质地偏粘，交换性钙、镁含量丰富；依据凉山植烟黄壤综合养分指数（IFI）将土壤肥力划分为高、较高、中、较低、低5个等级，有82．27％黄壤处于中等以上水平，变幅为0．3274～1．0000，平均分为0．7417，凉山植烟黄壤在整体上表现出较高的土壤综合养分指数。