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| Amelioration of Lead-zinc Tailings by Spent Mushroom Compost：Effects on Growth of Lolium perenne L. and Physico-chemical Properties of Tailings |
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| KeyWord:lead-zinc mine tailings; amelioration; spent mushroom compost; ecological restoration |
| Author Name | Affiliation | | ZHANG Xiao-jun | College of Biology and Environmental Science, Jishou University, Jishou 416000, China | | YANG Sheng-xiang | College of Biology and Environmental Science, Jishou University, Jishou 416000, China | | DUAN Chun | College of Biology and Environmental Science, Jishou University, Jishou 416000, China | | LIU Fen | College of Biology and Environmental Science, Jishou University, Jishou 416000, China | | LI Feng-mei | College of Biology and Environmental Science, Jishou University, Jishou 416000, China |
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| Abstract: |
| A pot experiment was conducted to evaluate the effects of different proportions of spent mushroom composｔ（ＳＭＣ） ｏｎ ｇｒｏｗｔｈ ｏｆ Lolium perenne L. and physico-chemical properties of lead-zinc mine tailings. SMC was incorporated into tailings at rates of 0, 1%, 5%, 10%, and 20%, with 4 replicates per treatment. Addition of SMC improved tailings properties and thus facilitated growth of L. perenne. Compared with the control, SMC applications increased NH+4-N, available P and organic matter by 0.4~5.1, 0.3~3.4, 0.4~4.7 times, decreased DTPA-extractable Cd, Pb and Zn by 52.6%~81.6%, 25.5%~35.4% and 25.4%~60.2%, respectively. Dehydrogenase, β-Glucosidase, and urease and phosphatase activities increased by 1.2~8.0, 2.7~5.6, 1.1~2.2, 0~0.8 times, respectively, in the treatments with SMC. Biomass of L. perenne was 0.8, 2.3, 2.6, 2.7 times higher in SMC treatments than in the control, respectively. In conclusion, SMC could be used for amelioration of lead-zinc tailings, and utilization of SMC also provides an alternative way for recycling these waste materials. |
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