a Institute of Pomology and Olericulture, Sichuan Agricultural University , Chengdu , Sichuan , China.
b Life Science and Technology Institute, Yangtze Normal University , Chongqing , China.
Int J Phytoremediation. 2018 Jul 29;20(9):855-861. doi: 10.1080/15226514.2018.1438356.
In this study, three cadmium (Cd) accumulator species (Conyza canadensis, Cardamine hirsuta, and Cerastium glomeratum) were co-cultured in Cd-contaminated soil in pots to study the effects of intercropping on co-remediation. Only C. canadensis intercropped with C. glomeratum, C. hirsuta intercropped with C. glomeratum, and three-species intercropping increased plant biomass compared with their respective monocultures. The treatments of C. canadensis intercropped with C. glomeratum and three-species intercropping increased the Cd contents in roots and shoots of C. canadensis, whereas the other intercropping treatments decreased or had no significant impact on Cd contents. As for Cd accumulation, the treatments of C. canadensis intercropped with C. glomeratum, C. hirsuta intercropped with C. glomeratum, and three-species intercropping increased Cd accumulation in a single plant compared with that of their respective monocultures, whereas other intercropping treatments decreased Cd accumulation in individual plants. Only the treatments of C. canadensis intercropped with C. glomeratum and C. hirsuta intercropped with C. glomeratum increased Cd accumulation in shoots of a single pot compared with that of their respective monocultures. Therefore, C. canadensis intercropped with C. glomeratum and C. hirsuta intercropped with C. glomeratum may improve the phytoremediation efficiency for Cd-contaminated soil.
在这项研究中，三种镉（Cd）积累物种（加拿大飞蓬、播娘蒿和卷耳）在盆栽中被共培养于受 Cd 污染的土壤中，以研究间作对共修复的影响。只有加拿大飞蓬与卷耳的间作、播娘蒿与卷耳的间作以及三种植物的间作与各自的单作相比增加了植物生物量。加拿大飞蓬与卷耳的间作和三种植物的间作处理增加了加拿大飞蓬根部和地上部的 Cd 含量，而其他间作处理则降低或对 Cd 含量没有显著影响。至于 Cd 积累，加拿大飞蓬与卷耳的间作、播娘蒿与卷耳的间作和三种植物的间作处理比各自的单作增加了单株植物的 Cd 积累，而其他间作处理则降低了单株植物的 Cd 积累。只有加拿大飞蓬与卷耳的间作和播娘蒿与卷耳的间作处理增加了单盆植物地上部的 Cd 积累。因此，加拿大飞蓬与卷耳的间作和播娘蒿与卷耳的间作可能会提高受 Cd 污染土壤的植物修复效率。
