| 摘要: |
| 对极粗质地的森林土壤一次施用500t/hm2干污泥15年后的土壤剖面样品,分析了pH值、ECE、全N、P、K、S、Ca、Mg、Cd、Cu、Ni、Pb和Zn等,并同对照土进行比较。表层(0～17cm)中全N、P、S、CEC、Cd、Cu、Ni、Pb和Zn的含量明显高于对照区;由于这种风化不完全的土壤含K、Mg、Ca较丰富,处理区与对照区差异不大;土壤pH值处理区要低;Mg移到较深层次;Ni和Zn稍有移动;Pb、Cd、Cu、移至17～27cm,但未再向下层移动。 |
| 关键词: 森林土壤,土壤改良,城市污泥,土壤剖面,重金属,阳离子交换量 |
| DOI： |
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| Research on the Distribution of Nutrients and Heavy Metals in Forest Soil Amended with Municipal Sewage Sluge after 15 Years |
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Xue Dongsen1 Rob Harrison2 Chuck Henry2
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| Abstract: |
| This study analysed nutrients and trace metal concentrations in the extremely coarse textured forest soil fertilized with 500 t/hm2 of municipal sewage sludge after 15 years. Soil profile to a depth of 2m was sampled and pH, CEC, C, N, P,.S, K, Ca, Mg, Cd, Cu, Ni, Pb and Zn were quantitatively analysed and compared with the adjacent control soil. Total N, P, S, CEC, Cd, Cu, Ni, Pb, and Zn values were significant higher in surface horizons (0- 17 cm) than those in the control soil. Total K, Ca and Mg values were not obviously significant because of abandunt parent materials in this unweathered soil. Soil pH was lower in the sludged vs the control soils; Mg was found leaching into deeper layer, Ni and Zn were leached to a certain extent; Pb, Cd and Cu migrated to (17-27 cm), but not to move into subsoil layer. |
| Key words: forest soil, soil improvement, municipal sewage, soil profile, heavy metal, cation exchange capacity |
