Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Effect of Customized Fertilizer Application and Soil Properties on Amino Acids Composition in Rice Grain

  • Sung, Jwakyung (Division of Soil and Fertilizer, NAAS, RDA) ;
  • Lee, Yejin (Division of Soil and Fertilizer, NAAS, RDA) ;
  • Chun, Hyenjung (Division of Crop Production Technology, NICS, RDA) ;
  • Ha, Sangkeun (Division of Soil and Fertilizer, NAAS, RDA) ;
  • Sonn, Yeonkyu (Division of Soil and Fertilizer, NAAS, RDA) ;
  • Lee, Jongsik (Division of Climate Change and Agroecology, NAAS, RDA)
  • Received : 2015.07.06
  • Accepted : 2015.10.13
  • Published : 2015.10.31
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Abstract

Our government has performed to support the nation-wide application of customized fertilizer based on soil-testing results and crop nutrient balance in order to promote the environment-friendly agriculture and to respond the global environment guide-line since 2010. This study was performed at the selected local paddy fields (Hwaseong-si, Uiseong-gun and Miryang-si) with different soil chemical properties in 2012. The contents of amino acids measured showed an increasing trend with fertilization, and glutamic acid was the most abundant amino acid followed by aspartic acid, leucine and alanine. However, valine, isoleusine, tyrosine and lysine were not significantly affected by fertilization. The significant differences in grain N, expressed as a crude protein, and amino acids dose was observed between experimental sites (p<0.001), treatments (p<0.01 to 0.001) and interaction of both factors (p<0.01 to 0.001). In our experiment the following order of carbon skeleton backbones to produce amino acids was observed irrespective of experiment sites and fertilization: ${\alpha}$-ketoglutarate > oxalate > pyruvate > 3-phosphoglycerate > phosphoenolpyruvate. In conclusion, customized fertilizer had no difference in amino acids compared to the conventional-NPK practice which was higher than in no fertilization, and also the normal paddy represented slightly higher amino acids compared to the reclaimed. Further study based on the present results is required to investigate what is main factor to amino acids between genetic and environmental factors.

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References

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