| 不同质量浓度铅对黑麦草根系分泌物和铅吸收富集的影响 |
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| 引用本文： | 乔冬梅,庞鸿宾,齐学斌,杜臻杰,赵志娟,樊涛.不同质量浓度铅对黑麦草根系分泌物和铅吸收富集的影响[J].灌溉排水学报,2012(2):43-47. |
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| 作者姓名： | 乔冬梅 庞鸿宾 齐学斌 杜臻杰 赵志娟 樊涛 |
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| 作者单位： | 中国农业科学院农田灌溉研究所;中国农业科学院河南新乡农业水土环境野外科学观测试验站;中国农业科学院农业水资源高效安全利用重点开放实验室 |
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| 基金项目： | 国家自然科学基金资助项目(50809074);国家科技重大专项(2008ZX07425-004) |
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| 摘 要： | 为了揭示重金属铅的植物修复机理,采用水培试验研究黑麦草对铅的修复效果,结果表明,黑麦草在铅作用下分泌有机酸的种类随胁迫时间的推移而增加,且营养液中pH值的变化与黑麦草分泌的有机酸有直接关系。营养液Pb2+质量浓度400mg/L为pH值、有机酸、株高、干物质量、地上部分和根系含铅量以及根系耐性指数的敏感阈值。营养液Pb2+质量浓度大于600mg/L,严重限制了黑麦草的正常生长。
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| 关 键 词： | 黑麦草 铅 水培 植物修复 |
The Effect of Different Concentration of Pb2+ on Root Exudates and Pb2+ Accumulation of Ryegrass |
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| QIAO Dong-mei,PANG Hong-bin,QI Xue-bin,DU Zhen-jie,ZHAO Zhi-juan,FAN Tao.The Effect of Different Concentration of Pb2+ on Root Exudates and Pb2+ Accumulation of Ryegrass[J].Journal of Irrigation and Drainage,2012(2):43-47. |
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| Authors: | QIAO Dong-mei PANG Hong-bin QI Xue-bin DU Zhen-jie ZHAO Zhi-juan FAN Tao |
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| Institution: | 2,3 (1.Farmland Irrigation Research Institute of CAAS,Xinxiang 453002,China; 2.Agriculture Water and Soil Environmental Field Science Research Station of Xinxiang City Henan Province of CAAS,Xinxiang 453002,China;3.Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resources of CAAS,Xinxiang 453002,China) |
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| Abstract: | In order to explore the phytoremediation mechanism of lead,solution culture experiment was carried out to study the remediation effectiveness of ryegrass to lead.The result showed that the species of organic acid of ryegrass increased with stress time.And the pH value of nutrient solution has direct relation with organic acid.400 mg/L is sensitive threshold of pH value,organic acid,plant height,dry matter weight,lead content of aerial part and root,and root tolerance index.Lead limited seriously normal growth of ryegrass when nutrient solution concentration more than 600 mg/L. |
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| Keywords: | ryegrass Pb solution culture phytoremediation |
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