| 谢运河,纪雄辉,黄涓,彭华,田发祥,刘昭兵.赤泥、石灰对Cd污染稻田改制玉米吸收积累Cd的影响[J].农业环境科学学报,2014,33(11):2104-2110. |
| 赤泥、石灰对Cd污染稻田改制玉米吸收积累Cd的影响 |
| Effects of Red-mud and Lime on Cadmium Uptake of Corn in Dryland Converted from Cadmium Polluted Paddy Field |
| 投稿时间：2014-04-02 |
| DOI：10.11654/jaes.2014.11.005 |
| 中文关键词: 镉 玉米 石灰 赤泥 稻田改制 |
| 英文关键词: cadmium corn lime red-mud cropping system change |
| 基金项目:国家科技支撑计划课题(2012BAD14B17-1);湖南省科技重大专项(2011FJ1002-3) |
| 作者 | 单位 | E-mail | | 谢运河 | 湖南省土壤肥料研究所, 长沙 410125
中南大学研究生院隆平分院, 长沙 410125
农业部长江中游平原农业环境重点实验室, 长沙 410125 | | | 纪雄辉 | 湖南省土壤肥料研究所, 长沙 410125
中南大学研究生院隆平分院, 长沙 410125
农业部长江中游平原农业环境重点实验室, 长沙 410125 | jixionghui@sohu.com | | 黄涓 | 中南大学研究生院隆平分院, 长沙 410125
农业部长江中游平原农业环境重点实验室, 长沙 410125 | | | 彭华 | 湖南省土壤肥料研究所, 长沙 410125
中南大学研究生院隆平分院, 长沙 410125
农业部长江中游平原农业环境重点实验室, 长沙 410125 | | | 田发祥 | 湖南省土壤肥料研究所, 长沙 410125
农业部长江中游平原农业环境重点实验室, 长沙 410125 | | | 刘昭兵 | 湖南省土壤肥料研究所, 长沙 410125
农业部长江中游平原农业环境重点实验室, 长沙 410125 | |
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| 中文摘要: |
| 利用Cd污染稻田改制玉米的大田试验,研究了施用赤泥、石灰对玉米吸收积累Cd的影响。结果表明,施用赤泥、石灰对春玉米、秋玉米产量无显著影响,但与施用石灰相比,施用赤泥能显著增加玉米产量和生物量;施用赤泥、石灰皆显著提高了土壤pH值、显著降低了土壤有效态Cd含量,减少了玉米对Cd的吸收积累;春玉米、秋玉米施用赤泥后其籽粒Cd含量分别比对照降低了27.5%和21.1%,施用石灰后则分别降低了26.4%和31.1%;施用赤泥、石灰皆抑制了玉米对Cd的富集和转运,且赤泥抑制玉米茎、叶、籽粒富集Cd的能力优于石灰,但石灰阻控玉米由茎向籽粒及叶片中转运Cd的能力优于赤泥。大田试验结果还表明,稻田改制玉米结合赤泥、石灰等钝化剂的施用可能是一条实现Cd污染农田安全可持续利用的有效途径,也利于保障国家粮食安全和农产品质量安全。 |
| 英文摘要: |
| Chemical fixation is one of remediation techniques for heavy metal polluted soils that reduces heavy metal availability in soil through increasing soil pH and enhancing soil adsorption. In this study, a field experiment was conducted to study Cd absorption and accumulation in corn grown in dryland soil converted from Cd polluted paddy soil with applications of red mud and lime. Applying red-mud and lime had no significantly effects on yields of spring and autumn corn compared to the control. However, the yields and stalk dry weights of corn were significantly higher in red-mud than in lime treatments. Soil pH values increased but soil available Cd and corn Cd absorption decreased after application of red-mud and lime, and Cd content in spring and autumn corn decreased by 27.5% and 21.1% by red-mud, and decreased by 26.4% and 31.1% by lime respectively. Red-mud reduced Cd in corn stem, leaf and grain greater than lime did, but lime showed stronger ability to inhibit Cd transportation from stem to leaf and to grain than red-mud did. The present results show that an effective and safety option to utilize Cd-polluted paddy soil would be to grow corn in combination with red-mud and lime additions. |
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