Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Optimum Nitrogen Fertilization Based on Soil Testing for Rice Cultivation in Different Paddy Soils

논토양 유형별 토양검정에 기초한 질소 적정 시비량

  • Choi, Yong-Jo (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Lee, Seong-Tae (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Kang, Jin-Ho (Division of Applied Life Science, Gyeongsang National Univ.) ;
  • Lee, Young-Han (Gyeongsangnam-do Agricultural Research and Extension Services)
  • Published : 2006.03.31
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Abstract

Environment friendly agriculture is nowadays a major fiend to sustain balanced agricultural ecosystem, keeping its productivity. This study was conducted to determine the optimum levels of nitrogen (N) application for improving rice productivity and reducing N loss through N application based on soil diagnosis. four levels of N were applied with 0, 50, 100 and 150% of recommended levels by soil testing in 4 different paddy soils (i.e. normal, sandy, ill-drained and immature soils). Across N treatments, the greatest grain yield was observed in sandy soil and the lowest in ill-drained soil. The grain yield tended to decrease with increasing N application from 50% to 150% of recommended levels, except ill-drained soil. To ensure maximum yield the optimum levels of N application were estimated at 120 kg, 153 kg and 173 kg $ha^{-1}$ in normal, immature and sandy soil, respectively.

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References

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