107杨对土壤重金属的吸收和富集  

Absorption and Accumulation of Heavy Metal from Soil by Leaves of Populus×euramericana cv.'Neva' Plantation

作　　者：李金花[1] 何燕 段建平 张绮纹[1] 

机构地区：[1]林木遗传育种国家重点实验室,中国林业科学研究院林业研究所,北京100091 [2]北京市林业种子苗木管理总站,北京100011 [3]北京市延庆县种子苗木管理站,北京102100

出　　处：《林业科学研究》2012年第1期65-70,共6页Forest Research

基　　金：中国林业科学研究院林业研究所重点项目(ZD200905);林业公益性行业科研专项项目(201004004)

摘　　要：对北京市南郊房山区107杨绿化林地进行了土壤重金属吸收富集研究,林地周围有水泥厂、石材厂、污水和垃圾等不同污染源,结果表明:林地土壤受到了Pb、Cd、Cu和Zn不同程度的污染,Pb、Cu、Zn含量差异显著,Cd平均含量(0.077 6 mg.kg-1)低于北京市背景值,但Pb、Cu、Zn平均含量分别为37.61、26.25和90.3 mg.kg-1,均超过了背景值,3块林地107杨叶片的Pb、Cd、Cu和Zn含量不同,与土壤重金属含量的变化无明显规律性,107杨叶片对土壤Pb、Cd、Cu和Zn重金属元素均能吸收富集,但对不同重金属的吸收富集能力不同,呈现出Cd>Zn>Cu>Pb的变化趋势,尤其对Cd具有很强的富集能力,富集系数最高值大于16,表现出了低背景高富集,而对Pb、Cu的富集能力相对较小,富集系数均小于1;不同林地107杨叶片对同种重金属元素的吸收存在较大的差异。The absorption and enrichment of heavy metal elements by leaves of Populus×euramericana cv.＇Neva＇ were analyzed through content assessing of heavy metal elements in soils of three forest lands at Fangshan District in the southern suburb of Beijing.These forest lands with P.×euramericana cv.＇Neva＇ plantation were around with the various sources of pollution such as cement mill,stone mill,sewage and garbage.Some of heavy metal elements such as Cd,Pb,Cu,and Zn were found in the soil samples and leaves of P.×euramericana cv.＇Neva＇ grown on the three forest lands which were investigated.The results of investigation showed that the soils of three forest lands were polluted with Pb,Cd,Cu and Zn in varying degrees.The contents of Pb,Cu and Zn in soils were significantly different among the three forest lands,whereas the average content of Cd（0.077 6 mg·kg-1） was less but that of Pb,Cu,and Zn（37.61,26.25 and 90.3 mg·kg-1） were more than the average background value of Beijing.The contents of Pb,Cd,Cu and Zn in leaves of P.×euramericana cv.＇Neva＇ were different among three forest lands.With the changes of heavy metal contents in soil samples,there was no regularity on the changes of different heavy metal contents in leaves of P.×euramericana cv.＇Neva＇ grown on different forest land.P.×euramericana cv.＇Neva＇ can absorb and accumulate Pb,Cd,Cu and Zn in soil but showed different capacities of absorption and accumulation with the order of Cd Zn Cu Pb.Especially,its absorption and accumulation capacity for Cd was strong with maximum enrichment factor higher than 16 and showed high accumulation on low background,whereas its enrichment capacities for Pb and Cu were relatively poorer with average enrichment factor of less than 1.At different forest lands,there existed great difference on absorption capacity of P.×euramericana cv.＇Nev＇ with the same heavy metal.

关 键 词：107杨 土壤 叶片 重金属 吸收 富集 

分 类 号：S792.11[农业科学—林木遗传育种]