北京市耕地表层土壤有机碳分布及其影响因素
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孔祥斌, 胡莹洁, 李月, 段增强
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Distribution and influencing factors of soil organic carbon of cultivated land topsoil in Beijing
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KONG Xiangbin, HU Yingjie, LI Yue, DUAN Zengqiang
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表1 北京各区县耕地土壤碳密度和碳储量
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Table 1 Carbon density and carbon storage of cultivated land in the districts of Beijing
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| 各区 | 耕地面积 | 土壤有机碳密度/(t/hm2) | 有机碳储量/104 t | | 均值 | 标准差 | 变异系数/% | | 丰台区 | 6314 | 25.73 | 4.04 | 15.71 | 16.25 | | 大兴区 | 66338 | 20.43 | 4.77 | 23.33 | 135.50 | | 密云区 | 44316 | 21.27 | 6.68 | 31.41 | 94.26 | | 平谷区 | 30170 | 22.28 | 2.77 | 12.43 | 67.22 | | 延庆区 | 45649 | 22.62 | 9.94 | 43.96 | 103.25 | | 怀柔区 | 27944 | 26.96 | 7.64 | 28.32 | 75.33 | | 房山区 | 46100 | 23.30 | 9.28 | 39.84 | 107.43 | | 昌平区 | 29411 | 22.99 | 4.85 | 21.11 | 67.63 | | 朝阳区 | 8947 | 27.70 | 4.71 | 16.99 | 24.78 | | 海淀区 | 9190 | 27.58 | 5.58 | 20.22 | 25.34 | | 石景山区 | 19 | 32.93 | 3.36 | 10.19 | 0.06 | | 通州区 | 57704 | 23.69 | 4.85 | 20.46 | 136.68 | | 门头沟区 | 7362 | 39.93 | 6.44 | 16.12 | 29.39 | | 顺义区 | 60589 | 17.70 | 3.18 | 17.94 | 107.23 | | 合计 | 440053 | 22.51 | 5.58 | 22.72 | 990.34 |
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