| 施肥方式对膜孔点源入渗尿素转化特性的影响 |
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| 引用本文： | 董玉云,费良军,穆红文.施肥方式对膜孔点源入渗尿素转化特性的影响[J].干旱地区农业研究,2012,30(1):8-11. |
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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： | 兰州交通大学土木工程学院;西安理工大学水资源研究所;甘肃省电力设计院 |
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| 基金项目： | 国家自然科学基金项目(50579064);兰州交通大学“青蓝”人才工程基金(QL-08-20A);陕西高校省级重点实验室重点科研项目(03JS041) |
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| 摘 要： | 通过室内入渗试验,研究了不同施肥方式对膜孔点源入渗尿素转化特性的影响。结果表明,不同施肥方式下尿素的转化规律基本一致,施肥5 d后土壤铵态氮达到最高峰,随后的10 d内迅速下降至土壤的本底值,而土壤硝态氮一直平稳升高,于施肥后15 d左右达到最大值。不同施肥方式下膜孔点源入渗土壤尿素转化后铵态氮和硝态氮的分布特征有明显的不同。灌施情况下土壤铵态氮含量和硝态氮含量沿着远离膜孔中心的方向逐渐减小;表施情况下土壤铵态氮和硝态氮含量集中分布在土壤表层以下7～15 cm的土层内;深施情况下土壤铵态氮和硝态氮含量集中分布在土壤表层5～17 cm的土层内。
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| 关 键 词： | 膜孔灌 点源入渗 施肥方式 尿素 转化特性 |
Influence of fertilizer application on transform characteristics of soil urea under single film hole infiltration |
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| DONG Yuyun,FEI Liangjun,MU Hongwen.Influence of fertilizer application on transform characteristics of soil urea under single film hole infiltration[J].Agricultural Research in the Arid Areas,2012,30(1):8-11. |
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| Authors: | DONG Yuyun FEI Liangjun MU Hongwen |
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| Institution: | 1.College of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;2.Institute of Water Resources,Xi’an University of Technology,Xi’an 7100482,China;3.Gansu Design Institute of Electric Power,Lanzhou 730050,China) |
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| Abstract: | Based on lab experiment,the influence of fertilization application on transform characteristics of soil urea under film hole single point infiltration was researched.The results show that the transform laws of urea under different fertilization modes are the same.The NH+4-N content comes to the maximum value in 5 days after fertilization and decreases to the background value rapidly in the succedent 10 days.While the NO-3-N content increases all along and comes to the maximum value in 15 days after fertilization.The distribution characteristics NH+4-N and NO-3-N after transform of soil urea are different.The soil NH+4-N content and NO-3-N content under irrigation with fertilizer decrease with the distance further from the film hole center.The distribution of soil NH+4-N content and NO-3-N content under surface application concentrate in the 7~15 cm scope below soil surface.The distribution of soil NH+4-N content and NO-3-N content under deep application concentrate in the 5~17 cm scope below soil surface.The results lay a foundation for study of film hole irrigation fertilizer technique. |
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| Keywords: | film hole irrigation point source infiltration fertilizer application urea transform characteristics |
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