Yang Yu-Xi, Lu Huan-Liang, Zhan Shu-Shun, Deng Teng-hao-bo, Lin Qing-Qi, Wang Shi-Zhong, Yang Xiu-Hong, Qiu Rong-Liang
School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
Ying Yong Sheng Tai Xue Bao. 2013 Mar;24(3):832-8.
A five-year field trial was conducted at the surrounding area of Dabao Mountain Mine to explore the feasibility and availability of using kenaf (Hibiscus cannabinus) , a fiber crop with strong heavy metals tolerance and potential economic value, to reclaim the multi-metal contaminated acidic farmland soil. Different amendments were applied prior to the kenaf planting to evaluate their effects on the soil properties and kenaf growth. After the amendments application, the kenaf could grow well on the heavy metals contaminated soil with the Pb, Zn, Cu, Cd, and As concentrations being 1600, 440, 640, 7. 6, and 850 mg . kg-1, respectively. Among the amendments, dolomite and fly ash had better effects than limestone and organic fertilizer. With the application of dolomite and fly ash, the aboveground dry mass production of kenaf reached 14-15 t . hm-2, which was similar to that on normal soils, and the heavy metal concentrations in the bast fiber and stem of kenaf decreased significantly, as compared with the control. The mass of the bast fiber accounted for 32% -38% of the shoot production, and the extractable heavy metal concentrations in the bast fiber could meet the standard of 'technical specifications of ecological textiles' in China, suggesting that the bast fiber had potential economic value. It was suggested that planting kenaf combining with dolomite/fly ash application could be an effective measure to reclaim the multi-metal contaminated acidic farmland soil.
在大宝山矿周边地区进行了一项为期五年的田间试验，以探索利用红麻（芙蓉属大麻槿）来修复受多种金属污染的酸性农田土壤的可行性和实用性。红麻是一种对重金属具有较强耐受性且具有潜在经济价值的纤维作物。在种植红麻之前施用了不同的改良剂，以评估它们对土壤性质和红麻生长的影响。施用改良剂后，红麻能够在重金属污染土壤上良好生长，土壤中铅、锌、铜、镉和砷的浓度分别为1600、440、640、7.6和850毫克·千克-1。在这些改良剂中，白云石和粉煤灰的效果优于石灰石和有机肥。施用白云石和粉煤灰后，红麻的地上部干物质产量达到14 - 15吨·公顷-²，与正常土壤上的产量相似，并且与对照相比，红麻韧皮纤维和茎中的重金属浓度显著降低。韧皮纤维质量占地上部产量的32% - 38%，韧皮纤维中可提取的重金属浓度符合中国“生态纺织品技术规范”的标准，表明韧皮纤维具有潜在经济价值。建议种植红麻并结合施用白云石/粉煤灰可能是修复受多种金属污染的酸性农田土壤的有效措施。
