生物土壤结皮通过硝化-反硝化协同促进N2O排放的水热响应机制
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杜晟仲, 辛春明, 秦慧君, 周静, 韩国君, 齐鹏
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Biocrusts enhance N2O emissions through coupled nitrification-denitrification under temperature and moisture variability
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Shengzhong Du, Chunming Xin, Huijun Qin, Jing Zhou, Guojun Han, Peng Qi
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表1 温度、土壤类型、降水对N2O排放、累积排放通量的三因素方差分析
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Table 1 Three-factor Analysis of variance of temperature, soil type and precipitation on N2O emission and cumulative emission flux
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| 影响因子 | 因变量 | N2O排放通量 | | N2O累积排放通量 |
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| 自由度 | 均方 | F值 | P值 | 自由度 | 均方 | F值 | P值 |
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| 土壤类型 | 总反应 | 1 | 271.891 | 20.455 | 0.000 | | 1 | 32 676.513 | 12.021 | 0.001 | | 反硝化 | 1 | 140.224 | 18.605 | 0.000 | | 1 | 17 579.782 | 9.163 | 0.003 | | 硝化 | 1 | 21.811 | 19.494 | 0.000 | | 1 | 2 347.393 | 18.932 | 0.000 | | 降水 | 总反应 | 1 | 230.853 | 17.368 | 0.000 | | 1 | 26 348.350 | 9.693 | 0.002 | | 反硝化 | 1 | 143.733 | 19.071 | 0.000 | | 1 | 16 720.353 | 8.715 | 0.004 | | 硝化 | 1 | 10.418 | 9.311 | 0.003 | | 1 | 1 108.008 | 8.936 | 0.003 | | 温度 | 总反应 | 2 | 171.359 | 12.892 | 0.000 | | 2 | 19 663.916 | 7.234 | 0.001 | | 反硝化 | 2 | 96.507 | 12.805 | 0.000 | | 2 | 11 340.013 | 5.910 | 0.003 | | 硝化 | 2 | 10.591 | 9.466 | 0.000 | | 2 | 1 132.256 | 9.132 | 0.000 | | 土壤类型×降水 | 总反应 | 1 | 47.931 | 3.606 | 0.050 | | 1 | 7 195.752 | 2.647 | 0.106 | | 反硝化 | 1 | 15.065 | 1.999 | 0.159 | | 1 | 2 766.099 | 1.442 | 0.232 | | 硝化 | 1 | 9.115 | 8.147 | 0.005 | | 1 | 1 021.559 | 8.239 | 0.005 | | 土壤类型×温度 | 总反应 | 2 | 50.200 | 3.777 | 0.025 | | 2 | 6 043.845 | 2.223 | 0.112 | | 反硝化 | 2 | 20.651 | 2.740 | 0.068 | | 2 | 2 642.506 | 1.377 | 0.255 | | 硝化 | 2 | 6.554 | 5.858 | 0.004 | | 2 | 706.676 | 5.699 | 0.004 | | 降水×温度 | 总反应 | 2 | 47.846 | 3.600 | 0.030 | | 2 | 5 954.587 | 2.191 | 0.115 | | 反硝化 | 2 | 22.643 | 3.004 | 0.052 | | 2 | 2 937.968 | 1.531 | 0.219 | | 硝化 | 2 | 4.792 | 4.283 | 0.015 | | 2 | 540.494 | 4.359 | 0.014 | | 土壤类型×降水×温度 | 总反应 | 2 | 9.385 | 0.706 | 0.495 | | 2 | 1 404.114 | 0.517 | 0.598 | | 反硝化 | 2 | 2.953 | 0.392 | 0.677 | | 2 | 443.017 | 0.231 | 0.794 | | 硝化 | 2 | 3.781 | 3.379 | 0.037 | | 2 | 428.993 | 3.460 | 0.034 |
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