关键词: 林带, 林带方向, 带间距离, 林带结构, 配置

Abstract: In order to screen potential metallophytes, an investigation of soil and vegetation was conducted at the natural copper-outcropping ores, wasted mining pitheads, and the soils scattered or covered with copper ore and slag in Mayang copper mine. Chemical analysis showed that the concentrations of soil total Cu and DTPA-extractable Cu were 3250 and 393 mg·kg^-1, respectively, which were far higher than the concentrations of soil Zn, Pb, and Cd. Fifty-four plant species belonging to 47 genera and 28 families were found, and half of them fall into 4 families of Compasitae (9 species), Poaceae (7 species), Legumeceae (6 species), and Polygonaceae (5 species). Furthermore, Rumex acetosa, Polygoum capitatum, and Ficus tikoua were identified as the three distinctly dominant plant species in the habitats, and accumulated 120, 203, and 133 mg·kg^-1 of Cu in their shoots, respectively, with the bio-enrichment factor ranged from 0.01 to 0.1. These results suggested that high concentration of soil Cu might be the main factor limiting the plant natural colonization on Mayang copper mine, and the three dominant plants might act as Cu exudators or low Cu accumulators to adapt to soil Cu exposure, being able to be used for the phytoremediation of heavy metals-polluted soils.

Key words: Shelterbelt/windbreak, Direction of shelterbelt, Spacing interval between shelterbelts, Shelterbelt structure, Arrangement