| 膜孔灌肥液自由入渗硝态氮运移特性试验研究 |
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| 引用本文： | 穆红文,费良军,雷雁斌.膜孔灌肥液自由入渗硝态氮运移特性试验研究[J].干旱地区农业研究,2007,25(2):63-66. |
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| 作者姓名： | 穆红文 费良军 雷雁斌 |
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| 作者单位： | 1. 西安理工大学水资源研究所,陕西,西安,710048
2. 陕西省水利厅,陕西,西安,710048 |
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| 摘 要： | 以KNO3为入渗溶液,模拟研究了硝态氮在膜孔灌肥液自由入渗条件下的运移过程.结果表明,在湿润蜂运移的范围内,沿着膜孔水平方向和垂直方向,硝态氮前锋运移速率受土壤含水量的影响较大,并随着土壤含水量的增加而增加;硝态氮前锋运移速率与运移距离有很好的相关性,并随着运移距离的增加呈幂函数衰减变化.硝态氮前锋浓度随着运移距离的增加而升高,其变化趋势呈指数曲线关系,且在湿润锋(土壤干湿交界)面上达到最大值;硝态氮前锋浓度随土壤含水量的增加呈幂函数递减,两者的相关系数也达到了极显著水平.
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| 关 键 词： | 硝态氮 运移速率 运移浓度 土壤含水量 |
| 文章编号： | 1000-7601（2007）02-0063-05 |
| 修稿时间： | 2006-06-20 |
Characteristics of nitrate-N movement under film hole infiltration with fertilizer |
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| MU Hong-wen,FEI Liang-jun,LEI Yan-bin.Characteristics of nitrate-N movement under film hole infiltration with fertilizer[J].Agricultural Research in the Arid Areas,2007,25(2):63-66. |
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| Authors: | MU Hong-wen FEI Liang-jun LEI Yan-bin |
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| Abstract: | With solution for irrigation,the transport processes of nitrate nitrogen under film hole free irrigation with fertilizer was studied.The results showed that the transport velocity of nitrate nitrogen at the front in the wetting body in the horizontal direction and vertical direction was greatly influenced by soil water content and increased with soil water content increase;The transport velocity had a close correlation relationship with transport distance of nitrate nitrogen at the front and decreased with distance as power function.The concentration of nitrate nitrogen at the front increased with the distance,changed as exponential function,and reached to the maximum value at the surface of wet front(the interface of wet and dry soil);the concentration of nitrate nitrogen at the front decreased with soil water content increase as power function;the correlation coefficient between them reached very significant level. |
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| Keywords: | nitrate nitrogen transport velocity transport concentration soil water content |
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