| 谢霏,余海英,李廷轩,张锡洲,郑子成,陈光登.几种矿物材料对Cd污染土壤中Cd形态分布及植物有效性的影响[J].农业环境科学学报,2016,35(1):61-66. |
| 几种矿物材料对Cd污染土壤中Cd形态分布及植物有效性的影响 |
| Effects of some minerals on fractions and phytoavailability of Cd in Cd-contaminated soil |
| 投稿时间：2015-08-13 |
| DOI：10.11654/jaes.2016.01.008 |
| 中文关键词: 矿物材料 Cd 形态分布 植物有效性 |
| 英文关键词: minerals Cd fraction distribution phytoavailability |
| 基金项目:四川省科技支撑计划(2014NZ0008);四川省教育厅项目(14ZB0017);四川农业大学学科双支计划资助(2014) |
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| 中文摘要: |
| 采用盆栽试验,研究了海泡石、钙基膨润土、钠基膨润土、汉白玉和石灰5种矿物材料不同添加量对Cd污染土壤pH、有效Cd、Cd形态分布及小白菜生物量、Cd含量的影响。结果表明:几种矿物材料均可显着提高土壤pH,并显着降低土壤有效态Cd含量,且降低幅度随添加量的增加而增大。与对照相比,添加矿物材料后土壤pH提高0.1~0.7个单位,有效Cd含量降低9.19%~18.92%.几种矿物材料对土壤Cd形态的影响均以酸提取态和残渣态的变化较为明显,酸提取态Cd比例降低3.27%~8.68%,残渣态Cd比例升高1.35%~4.75%,添加海泡石和钠基膨润土处理的变化更为突出。小白菜地上部和根部Cd含量随矿物材料用量的增加而降低,分别较对照降低16.03%~42.95%和20.69%~50.34%,海泡石、钠基膨润土和石灰的降低效果更好。值得注意的是,除海泡石和钙基膨润土外,施用钠基膨润土、汉白玉和石灰在降低小白菜Cd含量的同时亦可造成其地上部生物量的显着降低。 |
| 英文摘要: |
| A pot experiment was carried out to study the effects of five minerals(sepiolite, Ca-bentonite, Na-bentonite, white marble, and lime) at three application rates on soil pH, available Cd, and Cd fractions as well as plant biomass and Cd content of Brassica chinensis L. in Cd-contaminated soil. Applying the five minerals significantly increased soil pH by 0.1~0.7, decreased soil available Cd by 9.19%~18.92% in a dose-effect manner, compared to the control treatment. Applications of minerals dramatically changed acid extractable Cd and residual Cd which was more prominent in sepiolite and Na-bentonite treatments. Compared with the control treatment, the proportion of acid extractable Cd decreased by 3.27%~8.68% and that of the residual Cd increased by 1.35%~4.75% in mineral treatments. The Cd content in both shoot and root of Brassica chinensis L. in mineral treatments decreased by 16.03%~42.95% and 20.69%~50.34%, respectively, compared with the control. Sepiolite, Na-bentonite and lime showed better performance in reducing the Cd content of Brassica chinensis L. However, applications of minerals remarkably decreased shoot biomass of Brassica chinensis L., compared to the control, except sepiolite and Ca-bentonite. |
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