| 烟叶重金属关键影响因子及其含量预测 |
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| 引用本文： | 商胜华,廖勇,冯小芽,饶兴义,孟建玉,杨慧,夏海乾.烟叶重金属关键影响因子及其含量预测[J].贵州农业科学,2017,45(2). |
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| 作者姓名： | 商胜华 廖勇 冯小芽 饶兴义 孟建玉 杨慧 夏海乾 |
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| 作者单位： | 1. 贵州省烟草科学研究院,贵州贵阳,550081;2. 贵州省烟草公司贵阳市分公司,贵州贵阳,550001;3. 贵州省烟草公司遵义市公司遵义县分公司,贵州遵义,563100 |
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| 基金项目： | 贵州省农业攻关项目“贵州烟叶主要重金属元素调控技术研究”，贵州省烟草专卖局(公司)科技重大专项“贵州烟区重金属风险评估及调控技术研究” |
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| 摘 要： | 为烟叶重金属的合理调控提供依据,针对土壤、灌溉水、降水和烤烟专用基肥4个关键因子,采用人工模拟试验法及相关分析数理统计法,研究各因子对烟叶重金属的污染常数,以污染常数为基础参数,分析烟叶重金属的来源及预测其含量。结果表明:各因子对烟叶中Cd、Hg、As、Pb、Cr的贡献率(污染常数)存在明显差异,在相同重金属浓度下,烟叶中各重金属含量的贡献率为降水灌溉水土壤烤烟专用基肥;贵州烟区烟叶中重金属主要来自土壤和烤烟专用基肥,其中,来自土壤的Cd、As、Pb、Cr各占66.82%、63.98%、92.90%和96.91%,烤烟专用基肥的各占33.01%、35.76%、7.05%和3.06%,Hg元素则有99.64%的来自烤烟专用基肥;初步构建烟叶重金属含量预测模型,经实测验证,各元素预测值平均偏差率在30%左右,预测准确率达60%以上,应用于烟叶重金属含量的粗略估测基本可行。
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| 关 键 词： | 烤烟 重金属 污染常数 污染来源 预测模型 |
Key Influence Factors on Heavy Metal Content in Flue-cured Tobacco and Prediction of their Content |
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| SHANG Shenghua,LIAO Yong,FENG Xiaoya,RAO Xinyi,MENG Jianyu,YANG Hui,XIA Haiqian.Key Influence Factors on Heavy Metal Content in Flue-cured Tobacco and Prediction of their Content[J].Guizhou Agricultural Sciences,2017,45(2). |
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| Authors: | SHANG Shenghua LIAO Yong FENG Xiaoya RAO Xinyi MENG Jianyu YANG Hui XIA Haiqian |
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| Abstract: | The contamination constants of soil,irrigation,rainfall and specific base manure to heavy metal content in flue-cured tobacco were analyzed by using the artificial simulation experiment method and mathematical statistics,and then the heavy metal source and content in flue-cured tobacco were analyzed and predicted by using contamination constants as basic parameters to provide the scientific basis for rational regulation of heavy metal content in flue-cured tobacco.Results:There are obvious differences in Cd,Hg,Pb and Cr contamination constant among four factors.The contribution ratio of heavy metal content in flue-cured tobacco is rainfall ＞ irrigation ＞ soil ＞ specific base manure under the same heavy metal concentration.The heavy metals in flue-cured tobacco are from soil and specific base manure in Guizhou tobacco-growing area mainly.66.82％ Cd,63.98％ As,92.90％ Pb and 96.91％ Cr of flue-cured tobacco are from soil and 33.01％ Cd,35.76 ％ As,7.05 ％ Pb and 3.06 ％ Cr of flue-cured tobacco are from specific base manure.99.64％ Hg of flue-cured tobacco is from specific base manure.The mean deviation ratio of predicted value of different elements is about 30 ％ by the established prediction model of heavy metal content in flue-cured tobacco and the prediction accuracy rate of the prediction model reaches above 60％,which indicates the prediction model can be basically used in rough estimation of heavy metal content in flue-cured tobacco. |
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| Keywords: | flue-cured tobacco heavy metal contamination constant contamination source prediction model |
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