| 肥液浓度对单膜孔入渗NO-3-N运移特性影响的室内试验研究 |
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| 引用本文： | 董玉云,费良军,穆红文.肥液浓度对单膜孔入渗NO-3-N运移特性影响的室内试验研究[J].农业工程学报,2006,22(5):204-206. |
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| 作者姓名： | 董玉云 费良军 穆红文 |
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| 作者单位： | 西安理工大学水资源研究所，西安 710048;西安理工大学水资源研究所，西安 710048;西北农林科技大学旱区农业水土工程教育部重点实验室，杨凌 712100;西安理工大学水资源研究所，西安 710048 |
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| 基金项目： | 国家自然科学基金项目(50579064，50179030)；陕西省高校省级重点实验室重点科研项目(03JS041)；西北农林科技大学旱区农业水土工程教育部重点实验室基金项目 |
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| 摘 要： | 该文通过室内入渗试验，研究了不同浓度的单膜孔肥液入渗NO-3-N的分布特性。研究表明：不同浓度的膜孔肥液入渗土壤NO-3-N浓度的湿润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-3-N浓度锋运移距离越大，土壤剖面NO-3-N浓度最大值越大，相同深度处土壤NO-3-N浓度也越大。肥液入渗土壤NO-3-N浓度分布特征与湿润体深度符合分段函数模型。供水入渗过程中，NO-3-N浓度锋运移距离和浓度最大值均随时间的延长而增大；再分布过程中，NO-3-N浓度锋运移距离继续增大，而NO-3-N浓度最大值逐渐减小。
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| 关 键 词： | 膜孔灌 点源入渗 肥液浓度 NO-3-N浓度分布 |
| 文章编号： | 1002-6819(2006)05-0204-03 |
| 收稿时间： | 2005-09-19 |
| 修稿时间： | 3/6/2006 12:00:00 AM |
Laboratory experimental study on effects of fertilizer solution concentration on transport characteristics of NO-3-N under single film hole infiltration |
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| Dong Yuyun,Fei Liangjun and Mu Hongwen.Laboratory experimental study on effects of fertilizer solution concentration on transport characteristics of NO-3-N under single film hole infiltration[J].Transactions of the Chinese Society of Agricultural Engineering,2006,22(5):204-206. |
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| Authors: | Dong Yuyun Fei Liangjun and Mu Hongwen |
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| Abstract: | Based on indoor experiment, NO-3-N concentration distribution characteristics under single point source infiltration with different fertilizer solution concentrations were studied. The wetting front distance of NO-3-N concentration under film hole infiltration has the same pattern as the movement of soil wetting front. The concentration front distance of NO-3-N and the maximum value of NO-3-N concentration in soil profile increase with the increase of the solution concentration at the same time. The NO-3-N concentration increases with the increase of the solution concentration at the same depth. The NO-3-N concentration distribution characteristics and wetting frong depth under fertilizer solution infiltration satisfy the subsection function model. The concentration front distance of NO-3-N and the maximum value of NO-3-N concentration increase with the increase of the time in the process of water supply. The concentration front distance of NO-3-N increases with the increase of the time in the process of redistribution and the maximum value of NO-3-N concentration decreases. |
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| Keywords: | film hole irrigation point source infiltration fertilizer solution concentration NO~-_3-N concentration distribution |
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