湘潭锰矿废弃地栾树人工林微量元素含量及分布特征  

Microelements concentration and distribution of Koelreuter paniculata plantations in slag wasteland of Xiangtan Manganese Mine

作　　者：罗赵慧[1,2] 田大伦[1,2,3] 田红灯[1,2] 徐露燕[1,2] 

机构地区：[1]中南林业科技大学,湖南长沙410004 [2]南方林业生态应用技术国家工程实验室,湖南长沙410004 [3]国家野外科学观测研究站,湖南会同418307

出　　处：《中南林业科技大学学报》2013年第5期85-90,共6页Journal of Central South University of Forestry & Technology

基　　金：国家林业公益性行业科技专项(201104009);湖南省教育厅项目(湘财教学[2010]70号);长沙市科技局创新平台项目(K1003009-61)

摘　　要：采用野外采样和室内分析相结合的方法,研究了湘潭锰矿废弃地5年生栾树人工林各组分微量元素含量、积累与空间分布特征。结果表明:土壤中微量元素含量顺序为Fe>Mn>Zn>Cu,除Fe的含量随深度增加而递增外,其它元素的含量随深度增加而变化规律性不明显;草本层和死地被物层微量元素含量顺序均为Mn>Fe>Zn>Cu;栾树各组分微量元素含量顺序为树叶>树枝>细根>树皮>粗根>根头>大根>树干,地上部分与地下部分微量元素含量排序均表现为Mn>Fe>Zn>Cu,且地上部分总含量要远高于地下部分;栾树人工林微量元素总积累量为165 837.14 kg/hm2,空间分布表现为土壤层>乔木层>草本层>死地被物层>灌木层;乔木层和林下植被层微量元素积累量排序为Mn>Fe>Zn>Cu,死地被物层和土壤层微量元素积累量排序为Fe>Mn>Zn>Cu;栾树对不同微量元素的生物吸收系数存在明显差异,其中对Mn和Fe元素的生物吸收系数最高,分别为0.08和0.05,Zn和Cu的分别为0.01和0.001,这表明栾树对Mn和Fe这2种元素具有较高的富集能力。By means of field investigation and sampling,the microelements(Fe,Mn,Cu and Zn) concentrations and distribution of different components of Koelreuteria were studied in Koelreuter paniculata plantations in the slag wasteland of Xiangtan Manganese Mine.The results indicate that(1) the microelement concentrations in the soil ordered from high to low as follows: Fe > Mn > Cu > Zn,of them the concentrations of Fe,Mn,Cu increased with the soil depth,but that of Zn showed a reveres variation;(2) in herb and litter layer,the order was:Mn > Fe > Zn > Cu,the concentration of Cu was lower than that in the soil layer,while other’s microelement concentrations were higher than that in the soil layer;(3) the order of microelement concentrations in different components of Koelreuteria was: root > trunk > bark > branch > leaf,the biomass was mainly concentrated in theaboveground part(27.79 t hm-2),the aboveground biomass was 77.82% of the total biomass and in addition,the organs’ biomass and nutrient contents did not have a linear relationship.(4) biological absorption coefficients of Koelreuteria to microelements varied obviously,of them,the absorption coefficients of Zn and Mn(1.57 and 0.57) were higher than two other elements(0.16 and 0.03).The results show that Koelreuteria has higher enrichment capacity to Zn and Mn.

关 键 词：锰矿废弃地 栾树人工林 微量元素含量 分配特征 湖南湘潭 

分 类 号：S718.5[农业科学—林学]