GEOCHEMICAL STUDY ON SELENIUM IN ROCK-SOIL-PLANT IN NORTHERN LIAONING PROVINCE
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摘要:
通过对辽宁北部地区岩石、土壤和植物中硒元素的地球化学研究,分析了硒元素在岩石-土壤-植物中的释放-迁移-吸收特征与数量变化规律.研究结果表明:岩石样品硒含量平均值为0.08×10-6,总体上岩石中硒质量分数呈现火山岩>碳酸盐岩>花岗岩/沉积岩>变质岩的规律;垂向上硒质量分数呈现土壤A层>土壤B层>成土母岩的变化规律;土壤表层硒平均含量0.24×10-6,土壤中硒质量分数总体上呈现棕壤(A、B层)>水稻土(A、B层)>草甸土(A、B层)>风砂土(A、B层)的规律;植物中硒平均含量0.07×10-6,植物对土壤中硒富集能力大小依次为杂草>榛子>水稻>玉米;土壤和水稻、土壤和榛子之间硒含量存在显著的正相关,土壤和杂草、土壤和玉米之间相关性不明显.
Abstract:Through the geochemical study of Se in rocks, soils and plants in northern Liaoning Province, the paper analyzes the release-migration-absorption of Se in rock-soil-plant. The results indicate that the average Se content in rocks is 0.08×10-6. For different rock types, the Se contents generally show the rule of volcanic rock > carbonate rock > granite/sedimentary rock > metamorphic rock. Vertically, the Se content shows the variation of soil layer A > soil layer B > pedogenic mother rock. The average Se content in topsoil is 0.24×10-6, with the general pattern of brown soil (A&B layers) > paddy soil (A&B layers) > meadow soil (A&B layers) > aeolian sandy soil (A&B layers); The average Se content in plants is 0.07×10-6, with the soil Se enrichment capacity of plants in the order of weeds > hazelnut > paddy rice > corn. There are significant positive correlations between soil and rice, soil and hazelnut, but no obvious correlations between soil and weeds, soil and corn.
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Key words:
- selenium /
- geochemistry /
- rock-soil-plant /
- Liaoning Province
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表 1 研究区岩石中硒元素含量特征表
Table 1. Characteristics of Se content in rocks of the study area
种类 样品数/件 平均值/10-6 最大值/10-6 最小值/10-6 极差(R) 标准偏差(SD) 变异系数(CV) 碳酸盐岩 11 0.11 0.62 0.01 0.61 0.17 1.55 花岗岩 13 0.07 0.22 0.02 0.20 0.05 0.75 火山岩 8 0.14 0.57 0.04 0.53 0.18 1.26 变质岩 15 0.05 0.44 0.01 0.43 0.10 1.81 沉积岩 13 0.07 0.31 0.02 0.29 0.07 0.97 表 2 研究区土壤中硒元素含量特征表
Table 2. Characteristics of Se content in soils of the study area
种类 样品数/件 平均值/10-6 最大值/10-6 最小值/10-6 极差(R) 标准偏差(SD) 变异系数(CV) 棕壤(A层) 86 0.30 0.85 0.05 0.80 0.13 0.44 风砂土(A层) 12 0.10 0.18 0.04 0.14 0.04 0.40 水稻土(A层) 19 0.23 0.43 0.14 0.29 0.07 0.33 草甸土(A层) 51 0.19 0.40 0.05 0.35 0.07 0.39 棕壤(B层) 87 0.22 0.71 0.06 0.65 0.10 0.46 风砂土(B层) 11 0.08 0.13 0.03 0.10 0.03 0.42 水稻土(B层) 19 0.18 0.45 0.08 0.37 0.07 0.43 草甸土(B层) 52 0.16 0.34 0.01 0.33 0.08 0.51 表 3 研究区植物中硒元素含量特征表
Table 3. Characteristics of Se content in plants of the study area
种类 样品数/件 平均值/10-6 最大值/10-6 最小值/10-6 极差(R) 标准偏差(SD) 变异系数(CV) 杂草 27 0.09 0.19 0.01 0.17 0.05 0.58 榛子 13 0.11 0.13 0.08 0.04 0.01 0.15 玉米 139 0.02 0.09 0.004 0.09 0.03 1.13 水稻 11 0.05 0.12 0.02 0.09 0.03 0.51 表 4 研究区不同土壤条件下植物硒富集系数参数表
Table 4. Se enrichment coefficients of plants by soil conditions in the study area
植物种类 棕壤(A层) 风砂土(A层) 草甸土(A层) 水稻土(A层) 平均值 杂草 0.27 0.63 0.45 榛子 0.26 0.26 玉米 0.12 0.38 0.11 0.15 0.19 水稻 0.20 0.30 0.25 -
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