| 费良军,脱云飞,穆红文.膜孔肥液自由入渗土壤铵态氮运移和分布特性试验研究[J].干旱地区农业研究,2008,(3):193~197 |
| 膜孔肥液自由入渗土壤铵态氮运移和分布特性试验研究 |
| Experimentation study on transports and distribution characteristic of without restrict fertile solution infiltration under film hole irrigation |
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| DOI：10.7606/j.issn.1000-7601.2008.03.39 |
| 中文关键词: 膜孔 自由入渗 铵态氮运移 分布 |
| 英文关键词:film hole irrigation without restrict infiltration transports distribution |
| 基金项目:国家自然科学基金项目(50579064) |
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| 中文摘要: |
| 通过室内膜孔肥液自由入渗试验,观测分析不同入渗时间和再分布过程中铵态氮运移和分布特性,结果表明:在肥液自由入渗过程中,铵态氮锋面运移滞后于土壤水分锋面,但土壤铵态氮含量和土壤含水率以膜孔为中心向外逐渐减小;在再分布初期,土壤铵态氮锋面和土壤水分锋面运移一致,土壤铵态氮含量和含水率以膜孔为中心向外逐渐减小,减小的速度变慢,但随着再分布时间延长,土壤铵态氮开始硝化成硝态氮,铵态氮含量减小,硝态氮含量增加。 |
| 英文摘要: |
| Based on lab experiment on transports and distribution characteristic of NH+4—N without restrict fertile solution infiltration under film hole irrigation．The results indicated that in the process without restrict fertile solution infiltration the transports of NH+4—N wetting front is slower than that of soil water content but the content NH+4—N and soil water content gradually reduces take the center of film hole as the center. Again in redistributed initial period?the transports of NH+4—N and soil water content of wetting front is consistent?the content NH+4—N and soil water content gradually reduces take the center of film hole as the center and reduces the speed to slow down?but lengthens again along with the redistributed time?The NH+4—N starts to transform NO-3—N?The NH+4—N content reduces and the NO-3—N content increase?this research for applying fertilizer the irrigation technology of film hole irrigation to establish the technology. |
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