华南农业大学学报Issue(1)：86-92,7.
不同潮汐淹浸程度下2种红树植物化学计量特征
Stoichiometric characteristics of mangroves Avicennia marina and Bruguiera sexangula var.rhynochopetala seedlings altered by different tide statuses
摘要
Abstract
[Objective]Through analysis of stoichiometry and hydrology , the right growing environment of the main species of Bruguiera sexangula var.rhynochopetala and Avicennia marina seedlings and their conservation and restoration in China could be figured out .[Method]The influences of waterlogging time on stoichiometric characteristics of Bruguiera sexangula var.rhynochopetala and Avicennia marina seed-lings in different organs (leaf, stem and root, respectively) were studied using the automatic tidal-simu-lation device in sand culture of greenhouse .The contents of 8 macroelements and 5 microelements were determined in the waterlogging treatments , respectively.[Result and conclusion]The content of K, P, Na, Cl, Mg, Ca, Al, Fe, Mn, B differed significantly in seedlings when waterlogging stress varied .The result of the experiment showed waterlogging had a significant effect on the distribution characteristics of elements in different organs of seedlings , and different species differed in stoichiometric characteristics . The elemental content in leaf was more obvious in waterlogging than that in stem and root of B.sexangula var.rhynochopetala and A.marina seedlings.The result of waterlogging treatment showed the contents of Fe, Al, Mn, Ni, B increased in leaf continually , decreasing in root slightly .The Fe and Al content in 20 h waterlogging about 4.2 and 6.6 times higher than that of 2 h in B.sexangula var.rhynochopetala seedlings.The Fe, Al, Mn, Ni, B in 24 h waterlogging about 4.7, 1.1, 3.5, 4.0 and 1.5 times than that of 2 h in A.marina seedlings.This is possibly one of the most important features of mangrove species in stoichiometry .There is a significant correlation between the change in Mg and Ca in different organs of two species and waterlogging levels .关键词
白骨壤/尖瓣海莲/潮汐/淹浸时间/化学计量学Key words
Avicennia marina/Bruguiera sexangula var.rhynochopetala/tide/waterlogging time/stoi-chiometry分类
农业科技引用本文复制引用
刘滨尔,廖宝文,李玫,陈玉军,管伟..不同潮汐淹浸程度下2种红树植物化学计量特征[J].华南农业大学学报,2014,(1):86-92,7.基金项目
国家林业科技支撑计划专题（2009BADB2B0404）；国家自然科学基金（41176084）；广东省林业科技创新专项资金（2011KJCX017-01，2009KJCX013-01）；国家林业局海南东寨港红树林生态站项目 （）
