土壤有机碳作用及转化机制研究进展
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张维理,KOLBEH,张认连
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Research Progress of SOC Functions and Transformation Mechanisms
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WeiLi ZHANG,H KOLBE,RenLian ZHANG
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表3 中国土壤有机质含量(0—30 cm土层)分级[24]
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Table 3 Soil Organic matter content (0—30 cm soil depth) in China
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分级
Grade | 分级释义
Grade interpretation | 有机质
OM (g·kg-1) | 换算系数
Conversion coefficient | 有机碳
SOC (Corg g·kg-1) | 占陆域面积
Ratio to land area (%) | | 1 | 很低 Very low | ≤5 | 1.724 | ≤2.9 | 5 | | 2 | 低 Low | 5—10 | 1.724 | 2.9—5.8 | 24 | | 3 | 较低 A little low | 10—15 | 1.724 | 5.8—8.7 | 18 | | 4 | 中 Medium | 15—25 | 1.724 | 8.7—14.5 | 19 | | 5 | 较高 A little high | 25—35 | 1.724 | 14.5—20.3 | 9 | | 6 | 高 High | 35—45 | 1.724 | 20.3—26.1 | 16 | | 7 | 很高 Very high | ＞45 | 1.724 | ＞26.1 | 6 |
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