3种用材林木对Pb耐受性和吸附性研究

Research on the Tolerance and Absorbability of Three Kinds of Commercial Timber to the Heavy Metal Pb

摘要: 本研究在温室沙培盆栽条件下对3种用材林木巨桉(Eucalyptus grandis Hill ex Maiden)、红椿(Toona ciliata Roem)、楠木(Phoebe nanmu (Oliv.) Gamble)进行重金属Pb的胁迫试验。结果表明,桉树、楠木和红椿植株对Pb都有一定吸收能力,其体内都存在Pb的吸收机制。在本试验条件下,楠木植株吸收重金属Pb的能力是桉树植株的3.63倍,是红椿植株的4.2倍;桉树植株吸收重金属Pb的能力是红椿植株的1.16倍。

Abstract: In this study,stress experiments of heavy metal Pb were carried out on the three kinds of commercial timber——Eucalyptus grandis,Toona ciliata and Phoebe nanmu with sand pot-planting method indoors.The result showed that the three kinds of timber all had certain absorptive ability to Pb,and there might be an absorption mechanism in all of their bodies.Under the experimental conditions,the absorptive ability to Pb of Phoebe nanmu was 3.63 times than that of Eucalyptus,and 4.2 times than that of Toona ciliata,and the ability of Eucalyptus was 1.16 times than that of Toona ciliata.