Study on the rule of nitric nitrogen movement and distribution under film hole irrigation with fertilizer
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DOI：10.7606/j.issn.1000-7601.2008.01.44
Key Words: film hole irrigation  irrigation with fertilizer  nitric nitrogen movement  nitric nitrogen distribution
Author NameAffiliation
CHENG Dongjuan Xi’an University of Technology Xi’an， Shaanxi 710048, China；Hebei Engineering University Handan,Hebei 056021, China 
FEI Liangjun Xi’an University of Technology Xi’an， Shaanxi 710048, China 
LEI Yanbin Project Office of Shaanxi Provincial Department of Water Resources,Xi’an, Shaanxi 710048, China 
YIN Juan Xi’an University of Technology Xi’an， Shaanxi 710048, China 
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Abstract:
      Through experiment with self-made device for film hole infiltration,the rule of NO3-N movement and distribution under film hole irrigation with fertilizer is studied.The results show: the NO3-N concentration front movement consists with the water wet front movement in the course of water infiltration.The NO3-N content decreases with the increasing of distance from film hole center.The NO3-N content decreases abruptly to background value at the wet front; water moves slowly in the course of redistribution and water content distributes uniformly in the whole wet soil body.The NO3-N content decreases in the early 1～7 days of redistribution.Denitrification is more strongly in vertical indirection than in horizontal indirection and the NO3-N content decreases distinctly.The research results has laid a foundation for further study of film hole irrigation.
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