亚热带海岸沙地主要树种叶片金属元素含量与重吸收率  

Metal Element Content and Reabsorption Rate in Leaves of Main Tree Species in Subtropical Coastal Sandy Land

作　　者：黄雍容[1,2] 叶功富 高伟[1,2] 岳新建[3] 聂森 HUANG Yongrong;YE Gongfu;GAO Wei;YUE Xinjian;NIE Sen(Fujian Academy of Forestry, Fuzhou 350012, China;Fujian Provincial Key Laboratory of Silviculture and Forest Product Processing and Utilization, Fujian Casuarina Equisetifolia Engineering Research Center, Fuzhou 350012,China;Forest Inventory and Planning Institute of Fujian Province, Fuzhou 350003, China)

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、福建省木麻黄工程技术研究中心,福州350012 [3]福建省林业调查规划院森林资源监测室,福州350001

出　　处：《亚热带资源与环境学报》2021年第2期10-16,共7页Journal of Subtropical Resources and Environment

基　　金：福建省属公益类科研院所基本科研专项(2019R1009-6)。

摘　　要：为了探讨不同树种对养分贫瘠环境的适应策略,以中国亚热带海岸沙地上5种主要树种(木麻黄Casuarina equisetifolia、厚荚相思Acacia crassicarpa、湿地松Pinus elliottii、尾巨桉Eucalyptus grandis x E.urophylla和潺槁木姜子Litsea glutinosa)为研究对象,测定成熟叶片和凋落叶中的钾(K)、钙(Ca)、钠(Na)、镁(Mg)、铝(Al)、铁(Fe)、锰(Mn)、铜(Cu)、锌(Zn)9种元素含量,研究相同立地条件下不同树种对不同元素的重吸收率。结果表明:不同树种叶片中K和Na的重吸收率均为正值,木麻黄小枝K和Na重吸收率最高,是典型的“营养保存型”树种。5个树种叶片中Ca、Fe、Mn、Al均为富集,潺槁木姜子叶片中Zn表现为重吸收,尾巨桉叶片中Mg为重吸收率,在其他树种叶片中Mg和Zn均为富集;Cu在非固氮树种中为重吸收,在固氮树种中为富集。5个树种对不同营养元素的吸收具有均衡性,立地条件和树种生物学特性共同影响了不同树种叶片的金属元素含量和重吸收效率。To understand the adaptative strategies of different tree species in poor nutrient environment,the content of Potassium(K),Calcium(Ca),Sodium(Na),Magnesium(Mg),Aluminum(Al),Iron(Fe),Manganese(Mn),Copper(Cu)and Zn(Zine)of leaves and litter of five principal tree species in coastal sandy site including two nitrogen fixation species(Casuarina equisetifolia,Acacia crassicarpa)and three non-nitrogen fixation species(Pinus elliottii,Eucalyptus grandis x E.urophylla,Litsea glutinosa)were determined,reabsorption rate of different tree species to different elements under the same site condition were studied.The results showed the reabsorption rates of K and Na in the leaves of different tree species were all positive,and K was the key element affecting the growth of trees in coastal sandy land;the reabsorption rates of K and Na in the twigs of Casuarina equisetifolia were the highest,which was a typical“nutrient preservation”tree species.The contents of Ca,Fe,Mn and Al in leaves of five tree species were all enriched,Zn in leaves of Litsea glutinosa and Mg in leaves of Eucalyptus grandis x E.urophylla showed resorption,while in the other tree species showed accumulating.Cu showed resorption in non-nitrogen-fixing tree species and enriched in nitrogen-fixing tree species.The absorption of different nutrient elements of five tree species were balanced,site conditions and biological characteristics of tree species affect the metal content and reabsorption efficiency of different tree species leaves.

关 键 词：海岸沙地 树种 金属元素 养分重吸收效率 

分 类 号：Q948[生物学—植物学]