王豹,黄标,齐雁冰,孙维侠,胡文友,杨岚钦.风干对淹水稻田土重金属形态及其作物有效性的影响[J].农业机械学报,2013,44(5):89-95.
Wang Bao,Huang Biao,Qi Yanbing,Sun Weixia,Hu Wenyou,Yang Lanqin.Effect of Air Drying on Speciation and Plant Availability of Heavy Metals in Flooded Rice Paddies[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(5):89-95.
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风干对淹水稻田土重金属形态及其作物有效性的影响   [下载全文]
Effect of Air Drying on Speciation and Plant Availability of Heavy Metals in Flooded Rice Paddies   [Download Pdf][in English]
  
DOI:10.6041/j.issn.1000-1298.2013.05.017
中文关键词:  稻田土  淹水  风干  重金属形态  作物有效性
基金项目:环保公益性行业科研专项资助项目(201109018)
作者单位
王豹 中国科学院南京土壤研究所 
黄标 中国科学院南京土壤研究所 
齐雁冰 西北农林科技大学 
孙维侠 中国科学院南京土壤研究所 
胡文友 中国科学院南京土壤研究所 
杨岚钦 中国科学院南京土壤研究所 
中文摘要:为探索淹水稻田土风干处理后重金属形态及作物有效性的变化规律,在长江三角洲典型地区采集淹水土壤样品,原样与风干样均采用BCR连续提取方法结合原子吸收分光光度法测定Cd、Cr、Cu、Ni、Pb等重金属不同形态含量。结果表明:淹水状态下各形态占全量质量分数为酸可溶态11.5%、可氧化态21.5%、可还原态33.7%、残留态29.2%。风干后重金属酸可溶态、可还原态明显减少,可氧化态有增有减,残留态增加;对风干处理敏感程度从大到小依次为Ni、Pb、Cd、Cu,Cr保持稳定。田间淹水状态Cd、Ni、Cu作物有效性较高,Pb次之,Cr较低;样品风干处理后Ni、Cd、Cu表观活性降低,Pb反而明显增加,Cr保持稳定。主要结论是土壤风干样品不能如实反映田间淹水状态重金属形态分布,低估了土壤重金属作物有效性。
Wang Bao  Huang Biao  Qi Yanbing  Sun Weixia  Hu Wenyou  Yang Lanqin
Institute of Soil Science, Chinese Academy of Sciences;Institute of Soil Science, Chinese Academy of Sciences;Northwest A&F University;Institute of Soil Science, Chinese Academy of Sciences;Institute of Soil Science, Chinese Academy of Sciences;Institute of Soil Science, Chinese Academy of Sciences
Key Words:Rice paddies  Flooded  Air drying  Heavy metals speciation  Plant availability
Abstract:In order to explore the changes in speciation and plant availability of heavy metals in flooded rice paddies after air drying, flooded soil samples were collected in the typical area in Yangtze River Delta, and the flooded and air dried soil samples were treated with BCR sequential extraction method. Amended with atomic absorption spectrophotometer, the fractions of Cd, Cr, Cu, Ni and Pb were measured. The result showed that acid soluble was 11.5%, oxidisable was 21.5%, residual was 29.2%, reducible was 33.7% for flooded soil. After air drying, acid soluble and reducible fraction decreased while the residual fraction increased. The sensitive order was Ni>Pb>Cd>Cu, and Cr remained steady. In flooded condition, the plant availability of Cd, Ni and Cu were higher than Pb, and Cr was the lowest. After being air-dried, the plant availability of Ni, Cd and Cu decreased while Pb increased. It was concluded that the air dried samples could not exactly show the real speciation of heavy metals, and the plant availability of heavy metals was underestimated.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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