保护地西瓜连作土壤理化性质及尖孢镰刀菌变化规律研究

Abstract

通过对保护地栽培条件下不同连作年限西瓜土壤的调查分析，结果表明：随着西瓜连作年限的延长，土壤中速效磷、速效钾的含量迅速上升，土壤次生盐渍化加剧，土壤呈现酸化的趋势；土壤重金属元素中Cu、Zn、As、Cr的污染逐步加重；随着连作年限的增加，土壤中西瓜枯萎病菌–尖孢镰刀菌数量显著上升。 Through the soil investigation and analysis of different continuous cropping years under protected cultivation conditions of watermelon, the results show the content of available phosphorus and available potassium in soil has increased rapidly with the extension of watermelon continuous cropping years, the secondary salinization of soil is growing in intensity, and soil presents the acidification trends. The pollution of soil heavy metal elements (Cu and Zn, As, Cr) aggravated gradually. Along with the increasing years of continuous cropping, the number of wilt pathogen (Fusarium oxysporum) in soil increased significantly.