秋茄幼苗对盐度、淹水环境的生长适应  

Adaptability of mangrove Kandelia obovata seedlings to salinity-waterlogging

作　　者：游惠明[1,2] 

机构地区：[1]福建省林业科学研究院,福州350012 [2]福建省森林培育与林产品加工利用重点实验室,福州350012

出　　处：《应用生态学报》2015年第3期675-680,共6页Chinese Journal of Applied Ecology

基　　金：林业公益性行业科研专项经费项目(201404305)资助

摘　　要：室内模拟12个盐度+淹水处理组合对红树植物秋茄幼苗生长的影响,测定不同组合下秋茄幼苗的株高、茎高、基径、节数、叶数、根生物量、茎生物量、叶生物量及总生物量等9项指标.结果表明:盐度-淹水交互处理及盐度处理对秋茄各项生长指标影响显著,淹水处理对株高、茎高、基径、节数及叶数影响不显著,对根生物量、茎生物量、叶生物量及总生物量影响显著;秋茄幼苗生长量及生物量积累随盐度升高而降低,随淹水时间增加而下降;结合主成分分析得出,盐度7‰+淹水2 h下秋茄幼苗生长最好,临界胁迫组合为盐度21‰+淹水8 h处理组.A laboratory test on the effects of 12 salinity-waterlogging stresses on the growth of Kandelia obovata seedlings was conducted. Nine growth indexes including seedling height,stem height,basal diameter,node number,leaf number,root biomass,stem biomass,leaf biomass and total biomass were measured. The results showed that salinity and salinity-waterlogging stresses had significant effects on the growth of K. obovata seedlings,while waterlogging stress had no significant effects on the seedling height,stem height,basal diameter,node number and leaf number,but had significant effects on root biomass,stem biomass,leaf biomass and total biomass. The growth and biomass of K. obovata seedlings decreased with increasing the salinity and waterlogging time. The principal components analysis showed that K. obovata seedlings would grow best under the 7‰ salinity＋2 h waterlogging stress,while the 21‰＋8 h combination was a critical stress.

关 键 词：秋茄 盐度 淹水时间 生长量 生物量 主成分分析 

分 类 号：Q945.78[生物学—植物学]