凤凰县土壤—农作物系统中Cd含量及迁移富集特征
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肖凯琦, 徐宏根, 戴亮亮, 李毅, 李凯
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Cd in the soil-crop system in Fenghuang County: Content and migration and enrichment characteristics
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XIAO Kai-Qi, XU Hong-Gen, DAI Liang-Liang, LI Yi, LI Kai
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表3 研究区土壤重金属元素参数统计(n=120)
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Table 3 Parametric statistics of heavy metal elements in soil of the study area(n=120)
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指标 | 均值 | 最小值 | 中位数 | 最大值 | 变异系数/% | 湖南省土壤背景值[16] | 超筛选值/% | 超管控值/% | As | 9.53 | 3.16 | 9 | 27.9 | 35.17 | 15.70 | 0 | 0 | Cd | 0.27 | 0.088 | 0.27 | 0.65 | 36.51 | 0.13 | 35 | 0 | Cr | 63.34 | 45 | 63.85 | 85.9 | 11.24 | 71.40 | 0 | 0 | Cu | 26.23 | 12.3 | 24.9 | 54.6 | 26.02 | 27.30 | 0.8 | — | Hg | 0.11 | 0.052 | 0.10 | 0.27 | 34.79 | 0.12 | 0 | 0 | Ni | 28.12 | 18.4 | 27.75 | 43.8 | 16.80 | 31.90 | 0 | — | Pb | 31.97 | 23.5 | 31.9 | 68.6 | 15.11 | 29.70 | 0 | 0 | Zn | 79.92 | 45.1 | 78.1 | 188 | 20.75 | 94.40 | 0 | — | pH | 5.85 | 3.98 | 5.61 | 8.16 | 20.43 | — | — | — |
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