氮肥添加对川西北高寒草甸植物群落根系动态的影响
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字洪标,陈焱,胡雷,王长庭
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Effects of nitrogen addition on root dynamics in an alpine meadow, Northwestern Sichuan
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Hong-Biao ZI,Yan CHEN,Lei HU,Chang-Ting WANG
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| 表1 氮添加梯度对寒草甸土壤养分的影响(平均值±标准偏差, n = 6) |
| Table 1 Effect of nitrogen addition on soil nutrients of alpine meadow (mean ± SD, n = 6) |
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| 土层 Soil layer (cm) | 处理 Treatment | pH值 pH value | 有机质 SOM (g·kg-1) | 速效氮 AN (mg·kg-1) | 全氮 TN (g·kg-1) | | 0-10 cm | CK | 5.74 ± 0.10Aa | 110.92 ± 10.48Aa | 343.00 ± 9.40Ac | 6.38 ± 0.84Aa | | N10 | 5.42 ± 0.14Bb | 119.61 ± 19.21Aa | 323.40 ± 9.96Ad | 7.01 ± 0.81Aa | | N20 | 5.50 ± 0.25Ab | 121.68 ± 25.26Aa | 392.00 ± 2.46Ab | 6.95 ± 0.70Aa | | N30 | 5.44 ± 0.08Ab | 124.58 ± 11.78Aa | 418.95 ± 9.15Aa | 7.27 ± 0.97Aa | | 10-20 cm | CK | 5.73 ± 0.08Aa | 94.60 ± 11.23Aa | 290.33 ± 7.99Bb | 5.34 ± 0.93Aa | | N10 | 5.69 ± 0.27Aa | 88.10 ± 24.43Ba | 276.85 ± 8.20Bb | 5.20 ± 0.71Aa | | N20 | 5.62 ± 0.19Ab | 91.91 ± 17.75Ba | 328.30 ± 6.12Ba | 5.40 ± 0.83Aa | | N30 | 5.48 ± 0.16Ab | 95.30 ± 16.64Ba | 316.05 ± 4.85Ba | 5.64 ± 0.85Aa |
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