杨树落叶前后重金属元素内外迁移循环规律研究-应用生态学报.PDF

1996 4 7 2 CHINESE JOURNAL OF APPLIED ECOLOGY,Apr. 1996,7(2)201206 * 余国营　吴燕玉　王　新　(, 110015) , Zn Cu As Pb Cd . , 848% AsZn ,CuPbCd , ZnAs 40%, , 1727%. Cd Pb Cu . Transferring and cycling of heavy metals in and out of poplar tree before and after its . , ( , leaf fallen Yu Guoying Wu Yanyu and Wang in I ns tit ute of Ap p lied E cology A - , 110015) .- . . . ., 1996, 7( 2) :201206. cadem ia S inica Sheny ang Ch in J A pp l E col The transferring of heavy metals in poplar tree during its leaf fallen mainly occurs in the parts of leaf-branch, root and trunk. 848% of As and Zn in leaf is transferred to bark and timber and the storage of Cu Pb and Cd is increased T he internal cycling rate of, , . As and Zn occupies 40%, and the external one of Cd Pb and Cu occupies, 1727% of their storage. The purification efficiency of soil heavy metals by plants is also discussed in this paper. , , , . Key words Poplar tree Heavy metals Cycling Purification efficiency 1 2 2. 1 , [ 1,7, 8] , . 45 , , , .7 , , .8 , [3] . 10 , . , ., 8 10 , [4] , . , ,