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| Effects of NaCl Stress on Growth and Rhizoplane Soil Enzyme Activities of Different Cucumber Cultivars with Differing Salt Tolerance |
| ZHAO Suo，WU Feng-zhi* |
| College of Horticulture，Northeast Agricultural University，Harbin 150030，Heilongjiang，China |
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Abstract Salt-tolerant cucumber（Cucumis sativus L.）cultivar‘Jinchun No.5’and salt-sensitive cucumber cultivar‘Jinyou No.1’were used as materials．Taking NaCl（525 mg•kg-1）as salt-stress condition，the tanks are used to culture 2 different cucumber cultivars in the greenhouse．We compared the effect of growth and soil enzyme activities of these 2 different cucumbers in the root zone．The results show that the yield per plant and dry weight of salt-sensitive cucumber cultivar‘Jinyou No.1’is significantly lower than that of salt-tolerant cucumber cultivar‘Jinchun No.5’．And the leaf area of‘Jinyou No.1’after transplanting 50 d and soil dehydrogenase activity after transplanting 40 d are significantly lower than‘Jinchun No.5’．Under soil salinization condition，the inhibited urease，catalase and dehydrogenase activity of salt-tolerant varieties‘Jinchun No.5’are lighter than that of salt-sensitive varieties‘Jinyou No.1’in rhizospher after transplanting 30 d，40 d．
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Received: 18 August 2011
Published: 17 February 2012
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