青海玛沁县东部表层土壤养分地球化学评价
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张浩, 牛尧, 张海旭, 沙惠兰
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Geochemical evaluation of surface soil nutrients in eastern Maqin County, Qinghai Province, China
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ZHANG Hao, NIU Yao, ZHANG Hai-Xu, SHA Hui-Lan
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表3 微量营养与有益元素地球化学等级划分及统计
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Table 3 Classification and statistics of geochemical grades of micronutrients and beneficial elements
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| 指标 | 一等 | 二等 | 三等 | 四等 | 五等 | 超限 | | 丰富 | 较丰富 | 中等 | 较缺乏 | 缺乏 | | 氧化铁 | 含量/% | >5.30 | >4.60~5.30 | >4.15~4.60 | >3.40~4.15 | ≤3.40 | / | | 面积/km2 | 4039.79 | 1907.55 | 293.10 | 55.56 | 4.00 | / | | 比例/% | 64.12 | 30.28 | 4.65 | 0.88 | 0.06 | / | | 钴 | 含量/(mg·kg-1) | >15 | >13~15 | >11~13 | >8~11 | ≤8 | / | | 面积/km2 | 415.65 | 2808.22 | 2727.64 | 340.49 | 8.00 | / | | 比例/% | 6.60 | 44.57 | 43.30 | 5.40 | 0.13 | / | | 钒 | 含量/(mg·kg-1) | >96 | >84~96 | >75~84 | >63~75 | ≤63 | / | | 面积/km2 | 593.13 | 3331.74 | 1951.35 | 395.78 | 28.00 | / | | 比例/% | 9.41 | 52.88 | 30.97 | 6.28 | 0.44 | / | | 锗 | 含量/(mg·kg-1) | >1.5 | >1.4~1.5 | >1.3~1.4 | >1.2~1.3 | ≤1.2 | / | | 面积/km2 | 482.02 | 1219.11 | 2156.03 | 1492.14 | 950.70 | / | | 比例/% | 7.65 | 19.35 | 34.22 | 23.68 | 15.09 | / | | 硼 | 含量/(mg·kg-1) | >65 | >55~65 | >45~55 | >30~45 | ≤30 | ≥3000 | | 面积/km2 | 3604.11 | 2126.33 | 521.57 | 47.99 | 0 | / | | 比例/% | 57.21 | 33.75 | 8.28 | 0.76 | 0.00 | / | | 钼 | 含量/(mg·kg-1) | >0.85 | >0.65~0.85 | >0.55~0.65 | >0.45~0.55 | ≤0.45 | ≥4 | | 面积/km2 | 2003.75 | 3985.90 | 226.35 | 64.00 | 20.00 | / | | 比例/% | 31.81 | 63.27 | 3.59 | 1.02 | 0.32 | / | | 锰 | 含量/(mg·kg-1) | >700 | >600~700 | >500~600 | >375~500 | ≤375 | ≥1500 | | 面积/km2 | 2954.33 | 2604.47 | 586.16 | 135.04 | 20.00 | / | | 比例/% | 46.89 | 41.34 | 9.30 | 2.14 | 0.32 | / | | 铜 | 含量/(mg·kg-1) | >29 | >24~29 | >21~24 | >16~21 | ≤16 | ≥50 | | 面积/km2 | 839.67 | 3212.77 | 1763.03 | 470.46 | 6.07 | 8 | | 比例/% | 13.33 | 51.00 | 27.98 | 7.47 | 0.10 | 0.13 | | 锌 | 含量/(mg·kg-1) | >84 | >71~84 | >62~71 | >50~62 | ≤50 | ≥200 | | 面积/km2 | 521.34 | 3161.50 | 2227.07 | 377.95 | 2.07 | 10.07 | | 比例/% | 8.28 | 50.18 | 35.35 | 6.00 | 0.03 | 0.16 |
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