不同栽培制度温室土壤养分和微生物群落的动态变化

Changes of Soil Nutrients and Microbial Community in Different Cultural Systems Under Greenhouse Condition

【目的】评价连作8年黄瓜的温室土壤在采用不同栽培制度后对土壤养分和微生物群落的动态影响。【方法】利用盆栽方式进行连续4年不同栽培制度试验,采取常规的化学分析和选择性培养基方法分析不同栽培制度下各栽培茬口土壤养分和微生物组成动态变化。【结果】采用不同栽培制度连续处理4年后,所有处理EC、pH、全氮和速效养分含量均低于试验开始时本底值并呈缓慢下降的趋势;夏季填闲青蒜处理的EC、pH、全氮、速效氮、速效磷与对照差异显著。夏季填闲青蒜和轮作的栽培制度在第2、3年均显著降低土壤速效养分含量,显著改变了微生物的组成,增加了B/F值,降低了土壤尖孢镰刀菌的数量,显著增加了秋冬茬黄瓜产量。【结论】夏季填闲青蒜和轮作栽培制度能够连续4年持续改善连作土壤的质量,对连作土壤有一定修复效果,但这种效果随着处理年限的延长呈减缓趋势。

[Objective] The aim of this study was to evaluate soil nutrients and microbial community of typical-8-year-old cucumber planting soil by different cultural systems in greenhouse [Method] The study was conducted using conventional chemical analysis and selective medium in different cultural systems and periods for 4 years pot experiment. [Result] Soil EC, pH, and available nutrients of all treatments were lower than the base soil after four years improvement. Catch garlic reduced soil EC, pH, available N, and K, and showed a significant difference with the control. Catch garlic （CSI） and crop rotation （CS2） reduced the content of soil available nutrients in the second and third year, changed the component of soil microbe, increased B/F value and fall and winter cucumber yield, and reduced Fusarium oxysporum population. [Conclusion] Catch garlic in summer season （CS1） and crop rotation （CS2） could improve soil quality and have remediation effects on continuous cucumber soil, as times goes by, the effect will be reduced.