基于最小数据集和模糊数学法的水旱轮作区土壤肥力质量评价

基于湖北省水旱轮作区133个土壤样点数据,利用主成分分析及参选指标相关关系法确定了该区域土壤肥力质量评价的最小数据集,分别为土壤有机质、碱解氮、速效磷、速效钾、有效硼、有效钼、有效锌。利用模糊数学隶属度函数法对该区域土壤肥力质量进行了评价,结果表明:湖北省水旱轮作区的赤壁、洪湖、荆州、麻城和沙洋5个市(区、县)的土壤肥力质量以中等(III)为主,差(Ⅳ)等级次之,其中赤壁市和沙洋县土壤肥力质量以良(II)等级的比例(12.5%和9.5%)大于其他县市,5个县市土壤肥力质量均无优(I)和很差(V)2个等级。

Evaluation of Soil Fertility Quality with a Minimum Data Set and Fuzzy Logic in the Paddy-upland Rotation Region of Hubei Province

Based on 133 soil samples collected from the paddy-upland rotation region of Hubei Province,a minimum data set(MDS) for soil fertility quality evaluation was defined and developed with the principal component analysis and correlation analysis,which were soil organic matter,alkali-hydrolysable N,available P,available K,available Mo,B and Zn.And the soil fertility quality in this studied region was evaluated by fuzzy logic method.The results showed that the soil fertility quality was mainly grade of III in the rotation regions of Chibi,Honghu,Jingzhou,Macheng and Shayang,the grade IV was second,and there were not grades of I and V.However,the percentage of grade II in Chibi and Shayang cities was larger than that in the other three cities.