CAJ | 학술논문

[目的]通过化学计量学和水文学的分析，摸清主要红树植物尖瓣海莲Bruguiera sexangula var．rhynochopetala和白骨壤Avicennia marina的适生环境，为中国红树林保护和恢复提供科学依据．[方法]借助室内潮汐模拟系统，分析尖瓣海莲和白骨壤幼苗的叶、茎、根在每天不同淹浸时间梯度下8种大量元素和5种微量元素的化学计量特征变化．[结果和结论]K、P、Na、Cl、Mg、Ca、Al、Fe、Mn、B元素含量在每天不同程度的潮水淹浸下存在明显差异．淹浸时间的长短能够显著影响幼苗各器官的化学计量特征，且2个物种化学计量特征区别较大．潮水淹浸对尖瓣海莲和白骨壤各器官矿质元素的影响以叶片的变化最明显，茎干和根部变化较小．随每天淹浸时间延长，Fe、Al、Mn、Ni、B等元素在叶片中不断累积增加，在根中略有减少，尖瓣海莲叶中Fe、Al在淹浸20 h时的含量是淹浸2 h的4.2和6.6倍．白骨壤叶片中Fe、Al、Mn、Ni和B在每天淹浸24 h时的含量是每天淹浸2 h的4.7、1.1、3.5、4.0和1.5倍．这可能是红树植物受水淹胁迫后在元素化学计量上的重要表现之一．2种植物各个器官内Mg、Ca 2种元素含量变化与淹浸程度均显著相关．
[목적]통과화학계량학화수문학적분석，모청주요홍수식물첨판해련Bruguiera sexangula var．rhynochopetala화백골양Avicennia marina적괄생배경，위중국홍수림보호화회복제공과학의거．[방법]차조실내조석모의계통，분석첨판해련화백골양유묘적협、경、근재매천불동엄침시간제도하8충대량원소화5충미량원소적화학계량특정변화．[결과화결론]K、P、Na、Cl、Mg、Ca、Al、Fe、Mn、B원소함량재매천불동정도적조수엄침하존재명현차이．엄침시간적장단능구현저영향유묘각기관적화학계량특정，차2개물충화학계량특정구별교대．조수엄침대첨판해련화백골양각기관광질원소적영향이협편적변화최명현，경간화근부변화교소．수매천엄침시간연장，Fe、Al、Mn、Ni、B등원소재협편중불단루적증가，재근중략유감소，첨판해련협중Fe、Al재엄침20 h시적함량시엄침2 h적4.2화6.6배．백골양협편중Fe、Al、Mn、Ni화B재매천엄침24 h시적함량시매천엄침2 h적4.7、1.1、3.5、4.0화1.5배．저가능시홍수식물수수엄협박후재원소화학계량상적중요표현지일．2충식물각개기관내Mg、Ca 2충원소함량변화여엄침정도균현저상관．
[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 .