| 任理,马军花.考虑土壤中硝态氮转化作用的传递函数模型[J].水利学报,2001,32(5):0038-0045 |
| 考虑土壤中硝态氮转化作用的传递函数模型 |
| Transfer function model considering the transformation of nitrate-nitrogen |
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| DOI： |
| 中文关键词: 传递函数模型 转化 源汇项 NO-3-N 土壤 淋失 冬小麦 |
| 英文关键词: transfer function model (TFM) transformation source-sink terms nitrate-nitrogen soil leaching winter wheat |
| 基金项目: |
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| 摘要点击次数: 1894 |
| 全文下载次数: 62 |
| 中文摘要: |
| 本文运用传递函数模型，模拟了冬小麦从播种至返青期地中渗透计土壤2m出流处的NO-3N浓度动态。假设模拟时段内冬小麦的根系吸氮与累积实际蒸散量成正比，计算了冬小麦的吸氮动态(汇项)；联立由田间氮素平衡法所得的净矿化项(源汇项)从而获得净源汇项。在模型中将NO-3-N在土壤中的主要转化作用作为源汇项嵌入传递函数的模型中，建立了NO-3-N这一不稳定溶质在土壤中淋失的传递函数模型。通过对比实测资料，表明作者提出的考虑NO-3-NN主要转化作用的传递函数模型较通常保守溶质的传递函数模型具有更好的仿真精度。 |
| 英文摘要: |
| The outflow concentration of nitrate-nitrogen at depth of 2m in non-weighting lysimeter is simulated by transfer function model(TFM) in the stage from seedingto the end of turning-green of winter wheat.It is assumed that the uptake per unit of evapotranspiration is proportion to the cumulative quantity of actual evapotranspiration of winter wheat.The net source-sink term is calculated throughcombing the plant uptake andnetmineralization.Considering the main transformation of NO-3-N,source-sink terms,which are treated as if they are inputs to the solute transport volume,are incorporated into this TMF through their effects on the NO-3-N concentration of the solution entering the soil's transport volume.The quantity of N leached is calculated and good agreement is obtained.The comparison of simulation result with observation data shows that the model proposedby the authors possesses higher accuracy than the TMF of conventional conservative solute. |
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