不同盐处理对黄瓜幼苗生长及生理特性的影响

利用溶液培养方法研究了Ca(NO3)2、KNO3、NaNO3和NaCl.4种盐在阴离子浓度为14、56、98、1401、82.mmol/L.5个水平下对黄瓜幼苗生理特性的影响。结果表明:随着阴离子浓度的升高,4种盐处理均使黄瓜幼苗的生长受到抑制,质膜透性增大,脯氨酸含量增加,不同盐对保护酶系活性的影响有差异;3种含硝酸盐类的阳离子的影响大小依次为:钠盐>钾盐>钙盐;在相同水平的Na+离子条件下,NaNO3处理对黄瓜幼苗生长的影响大于NaCl处理。

Effect of different salt treatments on growth and physiological characteristics of cucumber seedlings

In this article,the growth and physiological characteristics of cucumber seedlings were studied under treatments(14,56,98,140,182 mmol/L) of Ca(NO3)2,KNO3,NaNO3 and NaCl.The results showed that with increasing concentration of NO-3,the growth of cucumber seedlings was inhibited,the membrane permeability was obviously increased,proline content was increased,but the effects of different salt treatments on the activity of protective enzymes were different. The effects of three kinds of NO-3-N fertilizer on cucumber seedlings followed the order that Na >K >Ca2 .At the same level of Na ,the effect of NaNO3 was greater than NaCl on cucumber seedlings growth.