不同栽培制度对连作黄瓜温室土壤长期修复效果的研究

Studies on Different Cultivation Systems on Soil Long Term Repair Effect of Continuous Cucumber Cropping in Solar Greenhouse

利用盆栽方式连续7a评价不同栽培制度对连作黄瓜土壤的修复效果。试验前4a,夏季填闲青蒜和番茄—普通白菜(小白菜)—黄瓜轮作可持续改善土壤质量,并且所有处理均不同程度的解决了土壤次生盐渍化问题,增加了秋冬茬黄瓜产量。从第5年开始,土壤EC值、pH值及全氮、速效氮、速效钾、有效磷含量开始缓慢上升,尖孢镰刀菌数量增加,各处理秋冬茬黄瓜产量均低于对照。综合来看,在本试验条件下,试验进行到第4年不同栽培制度的修复效果达到稳定,第5年开始弱化。

We utilized pot culture for 7 successive years to evaluate the repairing effect on continuous cucumber(Cucumis sativus L.)cropping soil by different cultivation systems.In the first 4 years,summer catch garlic and crop rotation(tomato-pakchoi-cucumber)could continuously improve the soil quality.All treatments could solve the problem of soil secondary salinization by different degree and increase the fall and winter cucumber yield.But since the 5th year,the soil EC and pH values,contents of nitrogen,available N,K and P,Fusarium oxysporum population had begun to increase slowly and the fall winter cucumber yields by all treatments were lower than the CK.All in all,under the condition of this experiment,up to the 4th year,the repairing effects of different cultivation systems were stable,but they began to be puny since the 5th year.