不同提取方法测定的油茶林地6种重金属有效性的比较研究

发布时间：2018-03-01 00:35

本文关键词： 油茶土壤重金属有效性　出处：《江西农业大学学报》2017年03期 　论文类型：期刊论文

【摘要】：为比较分析不同提取方法测定油茶(Camellia oleifera Abel.)林地重金属含量的差异及提取方法对重金属有效性的影响,试验采用Mehlich3、ASI、Bray、DTPA、HCl等5种浸提剂测定油茶林地Zn、Cr、As、Cd、Hg、Pb 6种重金属含量,分析5种方法提取量关系及其与油茶根系、叶片等器官重金属吸收量间相关性。结果表明:不同提取方法测定的油茶林土壤重金属含量有差异,Zn、Cr、As、Cd、Hg、Pb提取量范围分别在1.059~3.765、0.016~0.182、0.012~0.203、0.043~0.160、0.010~0.090、0.026~6.968 mg/kg,Zn、Cd提取量HClASIDTPAM3Bary;Pb、Cr提取量ASIHClDTPAM3Bary;As提取量DTPAASIM3HClBary;Hg提取量DTPAM3HClASIBary。HCl法提取As、Pb较真实反映出种皮吸收量,ASI法提取Hg、Pb、Zn分别较真实反映出果皮、种皮、种仁吸收量。浸提方法间相关关系与浸提方法提取量跟油茶吸收量相关关系不一致,即浸提方法间显著相关不足以说明其与油茶重金属吸收量亦显著相关。
[Abstract]:In order to compare and analyze the difference of heavy metal content in Camellia oleifera Abel.and the effect of extraction methods on the availability of heavy metals in Camellia oleifera Abel. forest land of Camellia oleifera, five extractants, Mehlich3Astria Brayrue DTPA-HCl and other extractants, were used to determine the contents of six heavy metals in Camellia oleifera Abel.in oil tea plantation. The relationship between the extraction quantity of five methods and the root system of Camellia oleifera was analyzed. The results showed that the content of heavy metals in different extraction methods of Camellia oleifera was different in the range of 1.059 ~ 3.7650.0160.182N 0.0120.203 ~ 0.043 ~ (0.043) ~ (0.043) ~ 0.160 ~ 0.010 ~ 0.090 0.0266.968 mg 路kg ~ (-1) 路kg ~ (-1) 路kg ~ (-1) CD content of HClASIDTPAM3 Baryn ~ (Cr) and the amount of DTPAM3HClASIBary.HCl ~ (3) HClBaryHg. The extraction of PbZn by ASI method was more true than that of pericarp by ASI method, and the amount of seed coat absorption by ASI method was more true than that by ASI method. The correlation between the extraction method and the extraction amount was not consistent with the absorption of Camellia oleifera, that is, the significant correlation between the extraction method and the heavy metal absorption of Camellia oleifera was not enough to indicate that it was significantly related to the heavy metal absorption of Camellia oleifera.
【作者单位】：中南林业科技大学经济林培育与保护教育部重点实验室;
【基金】：国家自然科学基金项目(31400582)~~
【分类号】：S714.5

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