盐胁迫对苦楝根系活力的影响  

EFFECTS OF SALT STRESS ON ROOT ACTIVITY OF MELIA AZEDARACH L.SEEDLINGS

作　　者：苗海霞[1] 孙明高[1] 夏阳[2] 李国雷[1] 张金凤[1] 张连英 

机构地区：[1]山东农业大学林学院,山东泰安271018 [2]山东省林业科学研究院,山东济南250001 [3]青岛市林业局,山东青岛266000

出　　处：《山东农业大学学报（自然科学版）》2005年第1期9-12,18,共5页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：国家科技攻关计划重大专项"中国森林生态网络体系东营试验点的研究(编号:2002BA516A15-04)"专题.

摘　　要：本文研究了盐胁迫下一年生苦楝苗根系的活力变化以及根系与地上部分的关系,目的在于探索苦楝的抗盐性。结果表明:盐胁迫能显著的降低根系和地上部分的生长,且地上部分受到的影响比根系受到的影响大;盐胁迫对苦楝苗木的含水量影响显著;随着盐浓度的升高,根系活跃吸收面积/总吸收面积比值的变化比较小,根系活力呈现先增后降的趋势,且均达到显著水平。The root activity and the relation between roots and above ground parts of one-year old seedlings of Melia azedarach L. were tested under various salt stress conditions in order to study the specific characteristics of salt tolerance of this tree species. The results show that salt stress treatments significantly reduce the growth of roots and above ground parts of this tree species .The growth of above ground parts was more susceptible to salt stress than that of roots. Salt stress treatments had obvious effects on the seedling water content.The increasing of salt content in treatments did not affect the ratio of living root absorbing areas over total absorbing areas.The activity of roots appeared an increasing and then a decreasing trend .The levels of increasing and decreasing were both significant.

关 键 词：根系活力 盐胁迫 苦楝 地上部分 活力变化 显著水平 一年生 抗盐性 含水量 盐浓度 面积 吸收 苗木 

分 类 号：S511[农业科学—作物学] Q945.78[生物学—植物学]