ACTA AGRICULTURAE BOREALI-SINICA ›› 2013, Vol. 28 ›› Issue (5): 194-197. doi: 10.7668/hbnxb.2013.05.033

Special Issue: Soil fertilizer

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Study on the Transformation Characteristics of Different Nitrogen Fertilizer under Film Hole Irrigation

DONG Yu-yun1, GUO Xiao-lei1, FEI Liang-jun2, MU Hong-wen3   

  1. 1 Collge of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
    2 Institute of Water Resources, Xi'an University of Technology, Xi'an 710048, China;
    3 Gansu Design Institute of Electric Power, Lanzhou 730050, China
  • Received:2013-07-14 Published:2013-10-28

Abstract: Based on lab experiment,transformation characteristics of nitrogen under film hole single point infil-tration with different nitrogen fertilizer were researched. Results showed that the transformation laws of nitrogen un-der different nitrogen fertilizer were different. The NH4+-N content at the vertical of film hole center changed in the depth of 0-5.5 cm after fertilization with ammonium fertilizer. The NH4+-N content lost 68%after redistribution of 15 d and it was transformed completely after redistribution of 20 d.With the redistribution time increased,the con-tent of NO3--N increased in the 10 cm scope of soil surface layer. Below the 10 cm scope of soil surface layer,the content of NO3--N first increased and then decreased in 7 d and it always increased after 7 d.The content of nitrate fertilizer changed little in 7 d after fertilization with nitrate nitrogen fertilizer,but it decreased obviously in 7-10 d and it decreased slowly after 10 d.The NH4+-N content came to the maximum value in 5 d after fertilization of urea and decreased to the background value in 20 days.While the NO3--N content increased all along and came to the maximum value in 20 days after fertilization.The soil NH4+-N content and NO3--N content under fertilization de-creased with the distance far from the film hole center. The results lay a foundation for study of film hole irrigation fertilizer technique.

Key words: Film hole irrigation, Nitrogen fertilizer, Transformation characteristics

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Cite this article

DONG Yu-yun, GUO Xiao-lei, FEI Liang-jun, MU Hong-wen. Study on the Transformation Characteristics of Different Nitrogen Fertilizer under Film Hole Irrigation[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(5): 194-197. doi: 10.7668/hbnxb.2013.05.033.

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