| 水稻土中Hg,Cd,Pb和As的空间变异性特征及相关影响因素探讨--以四川孝泉地区为例 |
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| 引用本文： | 刘爱华,杨忠芳,张本仁,汤奇峰,马晓可,金立新.水稻土中Hg,Cd,Pb和As的空间变异性特征及相关影响因素探讨--以四川孝泉地区为例[J].第四纪研究,2005,25(3):396-403. |
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| 作者姓名： | 刘爱华 杨忠芳 张本仁 汤奇峰 马晓可 金立新 |
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| 作者单位： | 中国地质大学地球科学与资源学院,北京,100083;中国地质大学地球科学与资源学院,北京,100083;中国地质大学地球科学与资源学院,北京,100083;中国地质大学地球科学与资源学院,北京,100083;中国地质大学地球科学与资源学院,北京,100083;中国地质大学地球科学与资源学院,北京,100083 |
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| 基金项目： | 四川省成都经济区农业生态地球化学评价项目 |
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| 摘 要： | 以四川孝泉地区水稻土为研究对象,利用地质统计学方法,系统地研究了水稻土中Hg,Cd,Pb和As含量的空间分布特征和空间变异性特征,就可能的影响因素进行讨论并得出结果:1)孝泉地区水稻土中Hg,Pb和As含量的空间自相关尺度分别为10.4km,3.8km和5.1km,且为中等程度相关;Cd在所研究的尺度上不表现明显的空间相关性。2)城镇生活、生产废弃物无序排放,铁路、公路运输,农业施肥、灌溉等因素对孝泉地区水稻土中Hg,Cd,Pb和As含量的空间变异性均有不同程度的影响。3)运用地质统计学方法处理多目标地球化学调查数据能有效地提取地球化学变量的空间结构信息并能在不同尺度上检验取样网度的合理性。
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| 关 键 词： | 四川孝泉地区 水稻土中Hg Cd Pb和As 空间变异性 |
| 文章编号： | 1001-7410(2005)03-396-08 |
| 收稿时间： | 2005-01-20 |
| 修稿时间： | 2005年1月20日 |
PROBE INTO THE SPATIAL VARIABILITY OF Hg, Cd, Pb, AND As CONTENTS IN PADDY SOIL AND ITS EFFECTED FACTORS: TAKE XIAOQUAN REGION AS AN EXAMPLE |
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| Liu Aihua,Yang Zhongfang,Zhang Benren,Tang Qifeng,Ma Xiaoke,Jin Lixin.PROBE INTO THE SPATIAL VARIABILITY OF Hg, Cd, Pb, AND As CONTENTS IN PADDY SOIL AND ITS EFFECTED FACTORS: TAKE XIAOQUAN REGION AS AN EXAMPLE[J].Quaternary Sciences,2005,25(3):396-403. |
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| Authors: | Liu Aihua Yang Zhongfang Zhang Benren Tang Qifeng Ma Xiaoke Jin Lixin |
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| Institution: | School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083 |
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| Abstract: | In order to study the effect of urban development, railage, highway transportation and sewage irrigation on Hg, Cd, Pb, and As concentrations in paddy topsoils (0～20cm), 160 topsoil samples were collected at the density of 1 sample per square kilometer around the Xiaoquan township in Sichuan province. Additional 20 samples were collected from two vertical sections parted by a highway. The total contents of four trace elements, namely mercury (Hg), cadmium (Cd), lead (Pb) and arsenic (As) were measured. Traditional statistic analysis and geo-statistic analysis were applied to analyze the spatial variability of Hg, Cd, Pd and As contents in paddy soil and the study results were as follow: 1)The statistic analysis results showed that the density of 1 sample per square kilometer matched the spatial analysis needed for Hg,Pb,As contents perfectly and the spatial selfcorrelation distance of Hg, Pb and As were 10.4km,3.8km and 5.1km respectively, but the sampling density did not match the spatial analysis needed for Cd and the spatial structure of Cd displayed pure nugget effect. 2) The spatial distribution characteristics of the samples with extremely high Hg, Cd, Pb and As contents(most distributed around township, some distributed along polluted trenches) revealed the fact that some paddy soil around township had been polluted badly with Hg, Cd, Pb and As by rejectamenta from township; the spatial structure anisotropy showed that railage mainly affected the Hg, and Cd, contents in the paddy soils along the railway line; and the distribution characteristics of Hg, Cd, Pb and As contents in the soil sections displayed that highway transportation dust mildly affected the Hg, Cd, Pb and As contents of the paddy soil down highways. 3) The case study results showed that for data of Multi-purpose regional geochemical survey, geo-statistic techniques was effective for extracting the information of spatial structure from geochemical variables and for proving the reliability of sampling density at different scales. |
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| Keywords: | Xiaoquan region in Sichuan Province Hg Cd Pb and As contents in paddy soil spatial variability |
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