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- Title
蚯蚓联合狗牙根对复垦土壤重金属含量的影响.
- Authors
鲁福庆; 王兴明; 储昭霞; 范廷玉; 陈明亮
- Abstract
Heavy metal contamination of coal gangue-filled reclaimed soil is one of the reasons that limit the subsequent use of reclaimed land. To study the effect of combined earthworm-dogwood action on heavy metals in reclaimed soils, indoor soil column experiments were used, and two mulch thicknesses(50 cm(L group) and 70 cm(H group)) were set up. The characteristics of soil physicochemical properties and changes of heavy metal Cr, Cu, Pb and Zn contents were analyzed. The results showed that earthworm inoculation alone(E), dogwood planting alone(C) and combined earthworm-dogwood(CE) all reduced mulch pH and mulch total Cr, total Cu, total Pb and total Zn contents, and enhanced soil OM, TN and TP contents.The CE treatment was more effective in reducing total heavy metals. The E treatment was able to increase the soil effective state heavy metals, while both C and CE treatments reduced the soil effective state heavy metals. Total Cr, total Pb and total Zn were reduced more significantly in the L group than in each treatment in the H group. The effective Cr and Zn contents were reduced better in the CE treatment only in the H group than in the L group. Redundancy and correlation analysis showed that soil pH and OM were the main factors affecting heavy metals in the overburden. Inoculated earthworms were able to influence heavy metals in dogtooth soil by affecting pH and OM content in the soil. Finally, the results of the study can provide a theoretical basis for the combined earthworm-dogwood application in reclaimed soils.
- Subjects
FLUVISOLS; HEAVY metals; SOIL acidity; STATISTICAL correlation; LAND use; DOGWOODS
- Publication
Environmental Science & Technology (10036504), 2022, Vol 45, Issue 3, p87
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.1969.21.338