| Influence of different fertilizer methods on distribution of water and nitrogen under ridge and furrow irrigation |
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| DOI：10.7606/j.issn.1000-7601.2013.02.29 |
| Key Words: ridge and furrow irrigation fertilizer method soil water content NO3--N content NH4+-N content |
| Author Name | Affiliation | | WANG Hehe | College of Water Resources and Architectural Engineering， Northwest A&F University, Yangling, Shaanxi 712100， China | | WU Pute | College of Water Resources and Architectural Engineering， Northwest A&F University, Yangling, Shaanxi 712100， China；
China Arid-area Water-saving Agricultural Institute， Northwest A&F University， Yangling， Shaanxi 712100， China
Institute of Soil and Water Conservation, Chinese Academy of Science, Yangling, Shaanxi 712100, China | | ZHAO Xining | China Arid-area Water-saving Agricultural Institute， Northwest A&F University， Yangling， Shaanxi 712100， China
Institute of Soil and Water Conservation, Chinese Academy of Science, Yangling, Shaanxi 712100, China | | CHEN Xiaoli | China Arid-area Water-saving Agricultural Institute， Northwest A&F University， Yangling， Shaanxi 712100， China | | WANG Zikui | College of Water Resources and Architectural Engineering， Northwest A&F University, Yangling, Shaanxi 712100， China | | LIU Yanfang | College of Water Resources and Architectural Engineering， Northwest A&F University, Yangling, Shaanxi 712100， China |
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| Abstract: |
| In order to probe the influence of different fertilizer methods(no fertilizer, furrow fertilizer, ridge bottom fertilizer, ridge top fertilizer) on distribution of water and nitrogen under ridge and furrow irrigation，simulating experiment of ridge and furrow irrigation was carried out. The results showed that: The soil water first infiltrate from furrow and during the process of soil water redistribution，the soil water in ridge increased obviously. Fertilizer method nearly not influent the soil water movement and distribution. The distribution of NO3--N is closely related with the soil water. Different fertilization methods effects the migration of NO3--N at a large extent. In addition, ridge bottom fertilizer or ridge top fertilizer can reduce soil NO3--N leaching effectively. To 40 cm soil depth, NO3--N content is only 7 mg·kg-1, mostly distributed in profile. However, Since the adsorption of the soil surface, NH4+-N accumulated in the fertilizer area, appearing peak. In the redistribution process, the content of NH4+-N in ridge top fertilizer is higher than in ridge bottom fertilizer. |
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