青藏高原人工草地土壤可溶性氮组分与植被生产力动态变化过程
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刘攀, 王文颖, 周华坤, 毛旭锋, 刘艳方
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Dynamics of soil soluble nitrogen and plant productivity in artificial pastures on the Qingzang Plateau
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LIU Pan, WANG Wen-Ying, ZHOU Hua-Kun, MAO Xu-Feng, LIU Yan-Fang
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表2 青藏高原人工草地种植禾本科牧草土壤氮组分与地上净初级生产力(ANPP)相关性分析
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Table 2 Correlation analysis of soil nitrogen components and aboveground net primary productivity (ANPP) on the Qingzang Plateau
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处理 Treatment | 指标 Variable | 0-10 cm | 10-20 cm |
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无芒雀麦 Bromus inermis | NH4+-N | -0.485 | -0.170 | NO3--N | 0.010 | 0.068 | SON | 0.392 | 0.676* | STN | 0.403 | 0.681* | 老芒麦 Elymus sibiricus | NH4+-N | -0.259 | -0.444 | NO3--N | -0.328 | 0.067 | SON | 0.347 | 0.459 | STN | 0.231 | 0.328 | 垂穗披碱草 E. nutans | NH4+-N | -0.436 | 0.239 | NO3--N | 0.190 | 0.096 | SON | 0.224 | 0.360 | STN | 0.219 | 0.331 | 西北羊茅 Festuca ryloviana | NH4+-N | -0.414 | -0.516 | NO3--N | -0.636* | -0.450 | SON | 0.377 | 0.111 | STN | 0.218 | -0.098 | 中华羊茅 F. sinensis | NH4+-N | -0.449 | -0.676* | NO3--N | -0.453 | -0.184 | SON | 0.526 | 0.277 | STN | 0.347 | 0.114 | 青海扁茎早熟禾 Poa pratensis var. anceps ‘Qinghai’ | NH4+-N | -0.293 | -0.134 | NO3--N | -0.531 | -0.266 | SON | 0.460 | 0.017 | STN | 0.338 | -0.155 | 星星草 Puccinellia tenuiflora | NH4+-N | -0.241 | -0.257 | NO3--N | -0.052 | 0.113 | SON | 0.146 | 0.216 | STN | 0.083 | 0.200 | 冷地早熟禾 Poa crymophila | NH4+-N | -0.494 | -0.548 | NO3--N | -0.831* | 0.177 | SON | 0.350 | 0.828** | STN | 0.091 | 0.694* |
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