摘要
通过几种主要造林树种在盐胁迫下体内Ｎａ＋和Ｋ＋含量变化的分析，对树木耐盐性及其机理进行了讨论。结果表明：不同树种的Ｎａ＋和Ｋ＋含量及在盐胁迫下的变化动态存在明显差异，说明其耐盐机制不同，树木的Ｎａ＋和Ｋ＋的质量比值，随ＮａＣｌ的质量浓度的增加而上升，其上升幅度在耐盐性强的白榆中较小；在盐胁迫下，适当地增加Ｃａ２＋，可维持树木体内较低的Ｎａ＋和Ｋ＋的质量比，从而提高树木耐盐性。
By analysing
the Na + and K + content in tree and their changes and distribution under salt stress, the
salt-resistant mechanism was discussed. The results show that there is a significant difference
inNa + and K +content among tree species, which indicates their difference in salt tolerance
and salt-resistant mechanism. Na +/K + of trees goes up with the salinity increasing in media,
but the increasing of Na +/K + is lower in tolerate species than in intolerate ones. It is found
that adding calciferous salt to media is effetive for trees to decrease Na +/K + in bodies and
increase salt tolerance.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1999年第1期24-27,共4页
Journal of Northeast Forestry University
基金
国家教委优秀青年教师基金
