赣南脐橙园土壤中稀土元素含量分布特征研究
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- 英文论文题名：Distribution characteristics of rare earth elements in soils from Gannan navel orange orchards
- 论文作者：蒋威 ; 薛珺 ; 黄晓成 ; 范玉兰 ; 李勋
- 英文论文作者：Wei Jiang ; Jun Xue ; Xiaocheng Huang ; Yulan Fan ; Xun Li ; Institute of Chemistry and Chemical Engineering ; Gannan Normal University
- 年：2016
- 作者机构：赣南师范学院化学化工学院;
- 论文关键词：脐橙果园 ; 土壤 ; 稀土元素 ; 分布特征
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十六分会：环境化学
- 语种：中文
- 分类号：S153.6
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十六分会 ; 环境化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：250k
- 原文格式：D
- 会议级别：全国
摘要
本研究采用微波消解ICP-AES法测定了赣南脐橙园243份土壤样本中的稀土元素(REE)含量,研究了赣南脐橙园土壤中稀土元素含量分布特征和分异特征,及其与土壤理化性质相关性。结果表明:稀土总量或轻稀土(LREE)、重稀土(HREE)分量均存在差异性大的现象,且轻重稀土分馏明显,轻稀土富集程度较高,Ce呈现强烈正异常,Eu呈现负异常。不同县市区脐橙园稀土总量呈现明显的区域差异,总体趋势由中心地区向外围地区递增。在不同的土壤类型中,轻稀土元素含量与稀土总量呈现相同规律性:水稻土>紫色土>黄壤>砂质红壤>红壤,而重稀土元素含量在紫色土中相对较高。通过相关性分析可知:土壤中各稀土元素含量和稀土总量与土壤pH值、有机质含量没有呈现明显的相关性,表明果园土壤中稀土含量主要决定于母质土壤。随着脐橙种植年限的增加,稀土元素呈现波浪式变化关系,先缓慢上升,后缓慢下降,最终趋于平缓,可能是果园各种环境不断地发生变化,对稀土含量具有一定的影响。因此,应提高果园管理水平,使土壤中稀土含量保持相对稳定的水平。
The REE content of soil samples from Gannan navel orange orchards were determined by microwave digestion and ICP-AES method.The results showed that a distinct fractional distillation phenomenon of REE and LREE were observed,and positive anomaly in Ce contents,and negative anomaly in Eu contents.The significant regional differences were showed in the REE of soils from different counties orchards.The general trend was increasing from the central area to the periphery area.In different soil types,the content of the LREE and the REE showed the same regularity:paddy soil>purple soil>yellow soil>sandy red soil>red soil.However,in the content of the HREE,the highest was found in purple soil.There was no obvious correlation between the REE content and pH,organic matter in orchard soils,which showed that the REE content in orchard soil depended mainly on parent material.The REE content increased slowly during the first several years after planted,and decreased slowly in the next few years,and eventually flattened out.Improving the management level of orchards was suggested to maintain the relative stability of REE content in soils.
The REE content of soil samples from Gannan navel orange orchards were determined by microwave digestion and ICP-AES method.The results showed that a distinct fractional distillation phenomenon of REE and LREE were observed,and positive anomaly in Ce contents,and negative anomaly in Eu contents.The significant regional differences were showed in the REE of soils from different counties orchards.The general trend was increasing from the central area to the periphery area.In different soil types,the content of the LREE and the REE showed the same regularity:paddy soil>purple soil>yellow soil>sandy red soil>red soil.However,in the content of the HREE,the highest was found in purple soil.There was no obvious correlation between the REE content and pH,organic matter in orchard soils,which showed that the REE content in orchard soil depended mainly on parent material.The REE content increased slowly during the first several years after planted,and decreased slowly in the next few years,and eventually flattened out.Improving the management level of orchards was suggested to maintain the relative stability of REE content in soils.
引文
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[2]Prego,R.;Caetano,M.;Bernárdez,P.;et al.Cont Shelf Res,2012,35(1):75-85.