新疆若羌县农用地表层土壤硒氟碘地球化学特征
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马常莲, 周金龙, 曾妍妍, 任贵兵, 王松涛
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Geochemical characteristics of selenium, fluorine, iodine in surface soil of the agricultural land in Ruoqiang County, Xinjiang
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MA Chang-Lian, ZHOU Jin-Long, ZENG Yan-Yan, REN Gui-Bing, WANG Song-Tao
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表2 研究区表层土壤理化指标统计参数(n=142)
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Table 2 Descriptive statistics of physicochemical parameters of surface soils(n=142)
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指标 | 背景值[17] | 最大值 | 最小值 | 平均值 | 中位数 | 标准偏差 | 变异系数/% | 富集系数q/% | 富集比例/% | OrgC | 1.45 | 10.69 | 0.10 | 0.48 | 0.38 | 0.88 | 183.3 | 33.1 | 0.7 | N | 442 | 1306 | 81 | 451 | 432 | 235.10 | 52.1 | 101.9 | 48.6 | pH | 6.7 | 9.15 | 7.55 | 8.37 | 8.54 | 0.35 | 4.2 | 124.9 | 100.0 | Se | 0.29 | 0.91 | 0.06 | 0.23 | 0.20 | 0.12 | 52.2 | 79.3 | 23.9 | F | 478 | 952 | 386 | 645 | 630 | 122.9 | 19.1 | 134.9 | 100.0 | I | 3.76 | 1.90 | 0.44 | 1.06 | 1.10 | 0.33 | 31.1 | 28.2 | 0 | SiO2 | 66.0 | 68.75 | 31.78 | 54.36 | 62.89 | 6.65 | 12.2 | 82.4 | 5.6 | Al2O3 | 12.5 | 52.96 | 5.09 | 10.11 | 10.06 | 3.73 | 36.9 | 80.9 | 0.7 |
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