4种木本植物对重金属铅、锌的积累及叶片养分含量特征研究  

Characteristics of Pb, Zn accumulation and foliar nutrient in four kinds of woody species

作　　者：王旭旭 黄鑫浩 胡丰姣 朱凡[1,2] 梁惠子 王仁杰 楚晶晶 朱雅荃 WANG Xuxu;HUANG Xinhao;HU Fengjiao;ZHU Fan;LIANG Huizi;WANG Renjie;CHU Jingjing;ZHU Yaquan(Central South University of Forestry and Technology, Changsha 410004, Hunan, China;National Engineering Laboratory for Applied Forest Ecological Technology in Southern China, Changsha 410004, Hunan, China)

机构地区：[1]中南林业科技大学,湖南长沙410004 [2]南方林业生态技术国家工程实验室,湖南长沙410004

出　　处：《中南林业科技大学学报》2018年第6期115-122,共8页Journal of Central South University of Forestry & Technology

基　　金：国家林业局"948"项目(2014-4-62);国家林业局软科学研究项目(2013-R09);湖南省财政厅研究经费资助项目

摘　　要：采用人工控制方法,研究4种木本植物榉树、毛红椿、栾树、木荷在不同浓度的Pb、Zn处理下体内重金属的分布与累积情况及叶片对养分的吸收情况。结果表明:4种木本植物对Pb的最大累积量分别为769.14、468.60、419.88、1 098.15 mg·kg^(-1),表现为:木荷>榉树>毛红椿>栾树,转运系数均小于1,地上部分富集系数表现为:毛红椿>木荷>栾树>榉树,根系富集系数表现为:木荷>毛红椿>榉树>栾树。榉树、毛红椿、栾树对Zn的最大累积量分别为144.83、154.96、166.23 mg·kg-1,低Zn浓度处理下,榉树、毛红椿、栾树中Zn主要累积在根系。重金属Pb、Zn对植物叶片的K、Ca吸收存在促进作用,对Fe存在抑制作用。榉树、栾树、毛红椿、木荷在Pb处理下均表现出较好的富集与转运能力,然而毛红椿、栾树、木荷耐Zn能力较差,榉树耐Zn能力最好。In this study, four kinds of woody species Zelkova schneideriana, Toona ciliata var. pubescens, Koelreuteria paniculata andSchima superba were tested under different（Pb, Zn） application rate level that range from CK to L4 by pot experiment. The results showed that the biggest content of Pb in different woody species were 769.14、468.60、419.88、1 098.15 mg·kg^-1, respectively, following the order： Schima superba 〉Zelkova schneideriana 〉Toona ciliata var. pubescens 〉Koelreuteria paniculata. Translocation factor of four kinds of woody species for Pb were all lower than 1. The order of the accumulator factor of the above ground organs was that Toona ciliata var. pubescens 〉Schima superba 〉Koelreuteria paniculata 〉Zelkova schneideriana and the root was that Schima superba 〉Toona ciliata var. pubescens 〉Zelkova schneideriana 〉Koelreuteria paniculata. The highest content of Zn in three kinds of woody species were that 144.83、154.96、166.23 mg·kg^-1, respectively. The most important component for heavy metals of three kinds of woody species was root when the concentration lower than L4. In a certain range of concentration, Pb, Zn had a promoting effect on the uptake of K, Ca in leaf, but inhibited the uptake of Fe. According to the Translocation factor, accumulator factor, four woody species were capable of accumulating and translocating Pb under Pb stress. Toona ciliata var. pubescens, Koelreuteria paniculata and Schima superba were proved to possess poor tolerance to Zn stress, but Zelkova schneideriana.

关 键 词：木本植物 转运系数 富集系数 养分含量 

分 类 号：S719[农业科学—林学]