文献类型：期刊文献

中文题名：深圳城镇森林常见树种营养器官重金属元素的含量及分布特征

英文题名：Concentrations and distribution patterns of heavy metals in tree species common in a subtropical Chinese urban region, Shenzhen

作者：李健容[1] 裴男才[1] 陈步峰[1] 史欣[1] 王成[2,3]

第一作者：李健容

机构：[1]中国林业科学研究院热带林业研究所;[2]中国林业科学研究院林业研究所国家林业局森林培育重点实验室/国家林业局城市森林研究中心;[3]广东珠江口城市群森林生态系统国家定位观测研究站

年份：2016

卷号：35

期号：6

起止页码：121-127

中文期刊名：生态科学

外文期刊名：Ecological Science

收录：CSTPCD;;CSCD:【CSCD_E2015_2016】；

基金：国家自然科学基金(31570594)

语种：中文

中文关键词：城镇森林景观;植物吸储;化学计量;生态功能;园山风景区;珠江三角洲

外文关键词：Urban forest and landscape; phytoabsorption; stoichiometric analysis; ecological function; Yuanshan scenic region;Pearl River Delta

分类号：Q14;X8

摘要：为了解城镇森林乔木树种的生态环境特性,通过调查遴选了深圳城郊园山景区内樟树(Cinnamomum camphora)、小叶榕(Ficus microcorpa)、台湾相思(Acacia confuse)、降真香(Acronychia pedunculata)、非洲楝(Khaya senegalensi)和板栗(Castanea mollissima)等6种常见乔木树种,测试和分析了其营养器官(根、枝干、叶片)中8种重金属元素(Zn、Cu、Cr、Ni、Pb、Cd、As、Hg)的含量,以研究各元素在该城镇区域部分常见树种营养器官中的变化特性。结果显示,多数常见树种营养器官内各重金属元素含量在标准范围内,且大多居于较低的含量水平,表明该区域总体上处于清洁水平。总体来看,叶片中重金属元素含量较高,根系次之,枝干较低;同一树种相同营养器官间的重金属含量存在显著差异。表明多叶或者根系发达的树种将吸储更多的重金属元素,可能对净化受污染生境有重要意义。部分优良景观树种(如降真香和樟树)在吸储重金属元素方面效果较好,可为美丽城镇森林景观优良树种的评价提供参考依据。
In order to illustrate the eco-environmental quality of urban forests in the Pearl River Delta, contents of eight heavy metals （i.e., Zn, Cu, Cr, Ni, Pb, Cd, As, Hg） in leaves, trunks and roots were detected from six common tree species in Yuanshan scenic region, Shenzhen. Furthermore, inter-specific variations and distribution patterns were explored among different plant nutritive organisms. The highest concentrations of heavy metals were detected in leaves, followed by roots and trunks, and with significant differences among these three organisms. The results also showed that concentrations of most heavy metals were within normal ranges of the terrestrial plants, and some were lower than normal values, indicating that the region is generally in clean condition. Two landscape species, Acronychia pedunculata and Cinnamomum camphora, were recommended as excellent native tree species in this site, because of their great performance on absorption of heavy metals. Therefore, tree species from families Rutaceae and Lauraceae with high volume of leaves and roots might be planted at the contaminated sites to remediate heavy metals. The present study sets an example for monitoring eco-environmental quality via stoichiometric analyses in plant nutritive organisms, which could be incorporated into the evaluation index system of urban forests in China.