热带亚热带植物学报2026，Vol.34Issue(4)：398-408,11.DOI:10.11926/jtsb.5036
海南滨海常见沙生植物叶片金属元素计量特征
Metrological Characteristics of Metal Elements in Leaves of Common Sandy Plants in Hainan Coastal Areas
摘要
Abstract
Metal elements are essential for plant biological processes but may also cause stress.To explore the characteristics of metal element absorption and utilization by coastal halophytes under high-salt conditions,this study selected six common coastal halophytes in Hainan[Vitex trifolia,Volkameria inermis,Stachytarpheta jamaicensis,Eupatorium odoratum,Lantana camara,and Ipomoea pes-caprae]as research subjects.The contents of four metal elements,potassium(K),calcium(Ca),sodium(Na),and magnesium(Mg),in their leaves and soil were determined,and the enrichment coefficients,stoichiometric ratios,and their correlations were analyzed.The results showed that the metal element contents in the leaves of coastal halophytes were distributed as K>Na>Ca>Mg,with contents of 21.07,1.49,1.13,and 0.59 mg/g,respectively.There were significant interspecific and regional differences,reflecting the adaptive regulatory mechanisms of plants to different soil conditions and environmental stresses.The plants had the strongest absorption capacity for K and Na,while the absorption capacity for Ca and Mg was relatively weak.Coastal halophytes had the strongest enrichment effect on metal elements K and Na.Different coastal halophytes had different enrichment abilities for different metal elements.Among them,Vitex trifolia and Ipomoea pes-caprae had the best enrichment abilities for K,Na,and Mg,while Eupatorium odoratum had the best enrichment ability for Ca.The leaf K content was significantly positively correlated with soil Na and Mg,and significantly negatively correlated with soil K,K:Na,K:Mg,and Ca:Mg.Leaf Ca was significantly positively correlated with soil K,K:Ca,K:Na,and K:Mg.Leaf Na and Mg had no significant correlation with soil metal elements and their stoichiometric ratios,indicating that coastal halophytes have complex ion regulation mechanisms.This provides guidance for comprehensively and systematically revealing the nutrient status of the ecosystem in coastal sandy areas and the cultivation and management of coastal halophytes,and also supplements the content of metal elements in coastal halophytes.关键词
滨海沙生植物/养分利用/化学计量/富集能力/适应机制Key words
Littoral sand plant/Nutrient utilization/Stoichiometry/Enrichment capacity/Adaptation mechanism引用本文复制引用
曹窈畅,王旭,郭昊,刘祖耀..海南滨海常见沙生植物叶片金属元素计量特征[J].热带亚热带植物学报,2026,34(4):398-408,11.基金项目
中国林业科学研究院基本科研业务专项项目(CAFYBB2018MB015)资助 This work was supported by the Project for Special Project for Fundamental Research of Chinese Academy of Forestry(Grant No.CAFYBB2018MB015). （CAFYBB2018MB015）
