| 石灰石和海泡石组配对水稻糙米重金属积累的影响 |
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| 引用本文： | 周 歆,周 航,曾 敏,胡 淼,杨文弢,刘 丽,廖柏寒.石灰石和海泡石组配对水稻糙米重金属积累的影响[J].土壤学报,2014,51(3):555-563. |
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| 作者姓名： | 周 歆 周 航 曾 敏 胡 淼 杨文弢 刘 丽 廖柏寒 |
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| 作者单位： | 中南林业科技大学,中南林业科技大学,中南林业科技大学 |
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| 基金项目： | 国家环保部公益性科研专项（No. 201009047）、国家自然科学基金项目(No. 41201530)、湖南省科技计划项目（No. 2013FJ3042）共同资助 |
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| 摘 要： | 为了研究组配改良剂(石灰石+海泡石,LS)对于重金属Pb、Cd、Cu和Zn复合污染稻田的修复效果,在湘南某矿区附近稻田中进行了组配改良剂的田间试验。结果表明:施用0~1.8 kg m-2的组配改良剂LS使土壤pH和CEC显著增加,使土壤中Pb、Cd、Cu和Zn交换态含量显著降低。土壤Pb、Cd、Cu和Zn交换态含量的降低是pH升高,土壤胶体的CEC增加及土壤吸附能力增强的共同作用。施用组配改良剂LS显著降低了3个水稻品种(黄华占、丰优9号、Ⅱ优93)糙米中Pb、Cd和Cu的累积量,最大降幅分别为55.8%、66.9%、37.4%,而对糙米中Zn的含量没有明显影响。当LS施用量为1.8 kg m-2时,能使丰优9号糙米中Cd含量(0.195 mg kg-1)达到国家食品中污染物限量标准(0.20 mg kg-1)以下。土壤中交换态Pb、Cd和Cu含量的降低是糙米中重金属累积量减少的原因。土壤交换态Pb、Cd和Cu含量的对数值(lnC交换态)与其糙米中含量(lnC糙米)的对数值之间存在显著的线性相关关系。
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| 关 键 词： | 修复 水稻 重金属 组配改良剂 石灰石 海泡石 |
| 收稿时间： | 6/5/2013 12:00:00 AM |
| 修稿时间： | 2013/10/7 0:00:00 |
Effects of combined amendment (limestone + sepiolite) on heavy metal accumulation in brown rice |
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| Zhou Xin,Zhou Hang,Zeng Ming,Hu Miao,Yang Wentao,Liu Li and Liao Bohan.Effects of combined amendment (limestone + sepiolite) on heavy metal accumulation in brown rice[J].Acta Pedologica Sinica,2014,51(3):555-563. |
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| Authors: | Zhou Xin Zhou Hang Zeng Ming Hu Miao Yang Wentao Liu Li and Liao Bohan |
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| Affiliation: | Central South University of Forestry and Technology,Central South University of Forestry and Technology,Central South University of Forestry and Technology |
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| Abstract: | In order to research the effect of applying combined amendment (limestone sepiolite) on heavy metal contaminated paddy soil, a field experiment have been carried out in a polluted paddy field around Shizhuyuan Mine area in Chenzhou city, Hunan Province, China. The experiment results indicated that: (1) Applying combined amendment (limestone sepiolite) significantly increased pH values and CEC contents, and decreased exchangeable fraction concentrations of Pb, Cd, Cu and Zn of 3 varieties of rice (Huanghuazhan, Fengyou 9 and II you 93) cultivation soil. The reason of soil exchangeable fraction concentrations of Pb, Cd, Cu and Zn reduced due to the conbined effect of the rise in pH value, CEC content and soil colloid adsorption capacity. The reduced effect increased with the amount of combined amendment (limestone sepiolite). (2) Applying combined amendment (limestone sepiolite) significantly decreased the concentrations of Pb, Cd and Cu in brown rice, the maximum concentrations reduced by 55.8%, 66.9%, 37.4%, respectively. However, application combined amendment have no significant effect on Zn concentration of the brown rice. It could decrease Cd concentration (0.195 mg kg-1) in brown rice of Fengyou 9 reaching the limits of the State Food and pollutants (0.20 mg kg-1g) or less, when application LS with the amount of 8 g kg-1. (3) It is showed that there were the power function relationships between the Pb, Cd, Cu and Zn concentration of brown rice and the Pb, Cd, Cu and Zn exchangeable fraction concentration of soil. And there were significantly positive linear correlation between the natural logarithm values (lnCbr) of Pb, Cd, Cu and Zn concentration of brown rice and natural logarithm values (lnCef) Pb, Cd, Cu and Zn exchangeable fraction concentration of soil. |
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| Keywords: | Remediation paddy heavy metal combined amendment limestone sepiolite |
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