In 2021,selecting 31 tobacco-planting plots distributed in seven tobacco-planting townships in Luliang County,Yunnan province,surface sampling and fuzzy mathematical membership function model were used to compare the differences in physical and chemical properties of tobacco-planting soil with different previous cropping,preliminatively evaluate the soil fertility quality,and the correlation between soil fertility and tobacco leaf quality was established.The results showed that the contents of total nitrogen,available potassium,organic matter,total potassium and cationic exchange capacity of the soil with green fertilizer as the previous crop were the highest,and the content of chlorine in the soil with potato as the previous crop was higher.The scores of the comprehensive evaluation of soil fertility of each treatment were 0.589 to 0.763,with green fertilizer as the previous crop scoring the highest,followed by corn,uncultivated and potato.The factors that had the highest influence on soil fertility were chloride ion and available phosphorus content.Structural equation model and correlation analysis showed that the previous crop changed soil fertility by directly affecting soil physicochemical properties,further affecting tobacco chemical properties,and finally affecting tobacco quality.
关键词
烤烟/前茬作物/土壤肥力质量评价/模糊数学隶属函数模型/结构方程模型
Key words
Flue-cured tobacco/Previous crop/Soil fertility quality evaluation/Fuzzy mathematical membership function model/Structural equation model
维普
万方数据