| 董玉云,费良军,穆红文,任建民.肥液浓度对膜孔单向交汇入渗NO-3-N运移特性的影响[J].干旱地区农业研究,2008,(4):38~42 |
| 肥液浓度对膜孔单向交汇入渗NO-3-N运移特性的影响 |
| Influence of fertilizer solution concentration on NO-3-N transport characteristics under single-line interference film hole infiltration |
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| DOI：10.7606/j.issn.1000-7601.2008.04.08 |
| 中文关键词: 膜孔灌 单向交汇入渗 肥液浓度 NO-3N浓度分布 |
| 英文关键词:film hole irrigation single-line interference infiltration fertilizer solution concentration NO-3—N concentration distribution |
| 基金项目:兰州交通大学“青蓝”人才工程基金资助计划资助； 国家自然科学基金项目(50579064)； 陕西高校省级重点实验室重点科研项目(03JS041) |
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| 中文摘要: |
| 通过室内入渗试验,研究了不同浓度的膜孔肥液单向交汇入渗NO-3N的分布特性。研究表明,不同肥液浓度的膜孔入渗湿润体膜孔中心和交汇界面中心垂向土壤NO-3N的浓度锋运移距离与土壤水分运动的湿润锋一致;肥液浓度越大,相同入渗时间的NO-3N浓度锋运移距离越大,土壤NO-3N浓度最大值越大,相同深度处土壤NO-3N浓度也越大。建立了肥液交汇入渗湿润体膜孔中心和交汇界面中心垂向土壤NO-3N浓度分布特征与湿润体深度之间的分段函数模型,经实测资料验证表明,该模型精度较高。入渗供水过程中,NO-3N浓度锋运移距离和浓度最大值随时间的延长而增大;再分布过程中,NO-3N浓度前锋运移距离随时间延长而增大,而NO-3N浓度最大值逐渐减小。 |
| 英文摘要: |
| Based on lab experiment NO-3—N concentration distribution characteristics under single-line interference film hole infiltration with different fertilizer solution concentration were studied．The concentration front transport distance of NO-3—N under single-line interference film hole infiltration had the same pattern as the movement of soil wetting front．The concentration front transport distance of NO-3—N and the maximum value of NO-3—N concentration in soil profile increased with the increase of the solution concentration in the same time．The NO-3—N concentration increased with the increase of the solution concentration at the same depth．The subsection function model for NO-3—N concentration distribution characteristics and wetting body depth of film hole center and interference interface center under fertilizer solution infiltration was developed and the model was verified by measured data．The concentration front transport distance of NO-3—N and the maximum value of NO-3—N concentration increased with the increase of the time in the process of water supply．The concentration front transport distance of NO-3—N increased with the increase of the time in the process of redistribution but the maximum value of NO-3—N concentration decreased． |
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