大气和土壤对蔬菜汞的贡献-应用生态学报.PDF

2002 3 13 3 CHINESE JOURNAL OF APPLIED ECOLOGY, M r. 2002, 13( 3) #315~ 318 * * * 刘德绍 青长乐 ( , 4007 16) , Hg Hg . 11 , Hg ; , Hg 60% . , Hg 576 ! 147ng∀m- 3, ( ) Hg ; HgHg Hg 704% ~ 907% 93% ~ 296% , Hg Hg Hg . 100 1- 9332( 2002) 03- 0315- 04 X173 A Contributionto vegetable mercury from atmosphere and soil. LIU Desh o, QING Ch ngle ( College of Re sources and Enironmental Science, Southwest Agricultural University, Chongqing 4007 16) .Chin. J. Appl. Ecol. , 2002, 13( 3) : 315~ 318. In this rese rch, the ch r cteristics of Hg ccumul tion in veget ble nd the contribution of t mosphere nd soil to veget ble Hg were studied by field observ tion nd pot experiments. 11 kinds of veget ble w ere experimented in field. The results indic ted th t t he Hg contents in roots nd le ves of veget bles were higher th n t h t in stems nd fruits. In the n tur l condit ion, more th n 60% of the ssimil ted Hg w s distributed in t he upground edible p rts. T he results of pot experiments show ed t h t t he Hg content of the edible p rts of c rrot nd lettuce exceed ed the Food He th St nd rd V lue ( FA SV) , when the tmospheric Hg content re ched 576 ! 147 ng∀m- 3 . This result indicted th t the contribution of tmosphere nd soil to veget ble Hg were 704~ 907% nd 93~ 296% respectively. So, the veget ble Hg w s ffected m inly by tmosphere Hg. Key words Veget ble, Mercury , Absorption. 3 6 , 1, 1 C CO 0. 3 1956 , Hg [ 5] 11 . 4 , . 7~ 16 , , ( , Hg