红花木耐逆境胁迫研究

On Resistance of Loropetalum chinense var. Rubrum

为明确红花木的适生环境,对红花木进行酸碱、盐及低温等胁迫处理,结果表明,红花木生长的最适pH值为5～6,在pH值为4的较强酸性环境和pH为7～8的中性或弱碱性环境中,红花木仍能生长,根系比叶片更容易受到pH值的影响.红花木耐盐胁迫性能较强,在盐含量15‰时能正常生长,根系的耐盐能力比叶片稍强些.红花木较耐寒,在-14℃的低温下能安全越冬,其根系的耐寒性强于枝叶,可以推广到年最低气温为-14至-16℃的地区.低于-16℃的地区,则要进行防冻处理.

We have dealt Loropetalum chinense var. rubrum with salt, low temperature and diff erent pH. Its optimum pH is 5～6. It vegetates normally at pH low to 4 and up to 7～8. The pH impresses root more severity than leaves. The salt fastness of Lor opetalum chinense var. rubrum is very strong and vegetates normally at 15 ‰ salt solution.The salt fastness of the root is a little more than leaves.The cold fa stn ess of Loropetalum chinense var. rubrum is very strong which can live through the winter at the temperature down to -16～-14 ℃.The cold fastness of the ro ot is greater than its shoot.It can plant at region whose lowest temperature i s -16～-14 ℃,and if the temperature is lower than -16 ℃,we must pevent fros tbite.