NaCl胁迫对不同耐盐黄瓜品种生长及根区土壤酶活性的影响

在温室中采用槽式栽培方法，以耐盐黄瓜品种津春5号和盐敏感黄瓜品种津优1号为试材，用浓度为525 mg?kg-1的NaCl处理土壤，研究NaCl胁迫对不同耐盐黄瓜品种生长状况及根区土壤酶活性的影响。结果表明：NaCl胁迫下盐敏感品种津优1号的单株产量和全株干质量均显著低于耐盐品种津春5号|随着黄瓜生长，盐敏感品种津优1号定植后50 d的叶面积和定植后40 d的土壤脱氢酶活性均显著低于耐盐品种津春5号|NaCl胁迫条件下，定植后30 d、40 d耐盐品种津春5号土壤脲酶、过氧化氢酶和脱氢酶活性较盐敏感品种津优1号受抑制程度轻，受盐害程度低，但差异未达到显著水平。

Effects of NaCl Stress on Growth and Rhizoplane Soil Enzyme Activities of Different Cucumber Cultivars with Differing Salt Tolerance

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．