大兴安岭呼玛河流域多年冻土区森林土壤有机碳和有效氮分布特征及影响因素
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郑智超, 满浩然, 臧淑英, 刘超, 董星丰
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Distribution characteristics and influencing factors of forest soil organic carbon and available nitrogen in permafrost regions of Huma River basin, Greater Hinggan Mountains
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Zhichao ZHENG, Haoran MAN, Shuying ZANG, Chao LIU, Xingfeng DONG
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表2 不同类型冻土区土壤有机碳和有效氮统计特征(平均值)
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Table 2 Statistical characteristics of soil organic carbon and available nitrogen in different permafrost zone types (averagestandard deviation)
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冻土区类型 | 变量 | 土层深度/cm |
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0~20 | 20~40 | 40~60 | 60~80 | 80~100 |
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不连续多年冻土区 | 有机碳SOC/(g·kg-1) | 99.67±13.14Aa | 73.47±9.28Ab | 53.94±7.40Ac | 42.03±4.01Ad | 34.30±3.67Ad | 铵态氮NH4+-N/(mg·kg-1) | 11.16±1.91Aa | 9.09±2.03Aab | 8.16±1.64Abc | 7.16±0.84Abc | 6.45±1.31Ad | 硝态氮NO3--N/(mg·kg-1) | 2.91±1.20Aa | 2.09±0.66Aab | 1.72±0.35Ab | 1.28±0.46Abc | 0.64±0.24Ad | 零星多年冻土区 | 有机碳SOC/(g·kg-1) | 75.10±7.36Ba | 56.89±11.01Bb | 44.32±5.93Bc | 36.97±5.06ABcd | 32.23±2.82Ad | 铵态氮NH4+-N/(mg·kg-1) | 14.52±2.54Ba | 10.22±1.64Ab | 9.07±1.64Ab | 8.87±1.83Ab | 7.90±0.96Bb | 硝态氮NO3--N/(mg·kg-1) | 1.54±0.57Ba | 1.28±0.51Bab | 1.10±0.35Bab | 0.99±0.40Aab | 0.63±0.44Ab | 岛状多年冻土区 | 有机碳SOC/(g·kg-1) | 67.98±3.01Ba | 52.17±5.75Bb | 44.94±6.07Bc | 34.03±6.60Bd | 28.85±4.84Ad | 铵态氮NH4+-N/(mg·kg-1) | 10.51±2.79Aa | 9.89±3.13Aab | 7.88±2.24Aab | 7.45±1.19Ab | 7.32±0.71ABb | 硝态氮NO3--N/(mg·kg-1) | 1.44±0.27Ba | 1.38±0.40Ba | 0.98±0.33Bb | 0.81±0.20Abc | 0.59±0.29Ac |
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