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不同质地土壤抑病性和微生物特征

Keywords: 土壤质地,番茄青枯病,微生物量

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Abstract:

采用盆栽试验方法,研究了不同质地土壤条件下番茄青枯病的发生情况和土壤微生物的特征。结果表明,土壤质地对番茄青枯病发生的影响较大,随土壤砂性的增加,番茄青枯病发生率升高;随土壤粘性的增加,番茄青枯病发生率下降。番茄植株生物量、土壤微生物碳氮、细菌、真菌和放线菌的数量都呈现相同的趋势:壤土高于砂性土壤,砂性土壤高于粘重土壤。说明土壤质地与土壤微生物区系和病害发生有重要关系。微生物生物量可以指示土壤肥力水平变化,用微生物量来考察土壤生态系统抑病功能时存在一定的局限性,需要从微生物群落结构组成和微生物种类来分析土壤生态系统。

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