KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
권호 표지

N Use Efficiency and Nitrate Leaching by Fertilization Level and Film Mulching in Sesame Cultivated Upland

  • Lee, Dong-Wook (Yeongnam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Park, Ki-Do (Yeongnam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Park, Chang-Young (National Institute of Highland Agricultur, RDA) ;
  • Son, Il-Soo (Yeongnam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Kang, Ui-Gum (Yeongnam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Ko, Jee-Yeon (Yeongnam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Shim, Kang-Bo (Yeongnam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Cho, Young-Son (National Institute of Crop Science, RDA) ;
  • Park, Sung-Tae (Yeongnam Agricultural Research Institute, National Institute of Crop Science, RDA)
  • Published : 2007.09.30
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Abstract

This study was conducted to evaluate the effect of slow release fertilizers (SRF), crotonylidene diurea (CDU) and latex coated urea (LCU), on nitrogen (N) use efficiency (NUE) and nitrate-N leaching in a silty clay loam soil under polyethylene film mulching (PFM) for sesame cultivation. In PFM plot, concentrations of $NO_3-N$ and $NH_4-N$ in SRF applied soils were less than that in the urea plot during the whole growing period. However, $NO_3-N$ and $NH_4-N$ in all the non-mulched plots (NM) were not significantly different. Urea-N in soil treated with SRF was higher than urea plot until 50 days after application and was comparable in all the treatments after 50 days. $NO_3-N$ concentrations in leached solution in 21 days after urea fertilization in PFM and NM were 26 mg $L^{-1}$ and 83 mg $L^{-1}$, respectively. However, $NO_3-N$ in leached solution at applied CDU and LCU was less than that of urea similar to nitrate concentration in soil. $NO_3-N$ in leached solution in applied CDU and LCU in 44 days after application was about 25% lower than that urea plot and PFM, while the $NO_3-N$ concentration of CDU and LCU treatment in NM did not changed. Application of SRF increased the yield of sesame and N recovery compared to urea and there was a little difference between SRF and N levels. In conclusion, application of 80% N level with SRF increased N recovery and reduced nitrate leaching without reduction of yields compared with urea application.

Keywords

References

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