Journal of Biosystems Engineering

Korean Society for Agricultural Machinery (한국농업기계학회)
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Influence of Fertilizing Methane Fermentation Digested Sludge to Rice Paddy on Growth of Rice and Rice Taste

메탄발효 소화액 시용이 벼 생육과 식미에 미치는 영향

  • Ryu, Chan-Seok (KSAM, Division of Environment Science and Technology, Kyoto University) ;
  • Lee, Choung-Keun (KSAM, Research Policy Bureau, RDA) ;
  • Umeda, Mikio (KSAM, Division of Environment Science and Technology, Kyoto University) ;
  • Lee, Seung-Kyu (KSAM, Department of Bio-Industrial Machinery Engineering, Gyeongsang National University)
  • Published : 2009.08.25
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Abstract

In this research, the vegetation growth and rice taste of the liquid fertilizer applied fields (LF) were compared with those of chemical fertilizer applied fields(CF) in order to confirm the possibility of methane fermentation digested sludge as liquid fertilizer using precision agriculture and remote sensing technology. In panicle initiation stage, the vegetation growth at LF was 60%~80% of it at CF and there were significant difference of nitrogen contents between CF and LF. The estimation model of nitrogen contents was established by GNDVI (R=0.607, RMSE=$1.04\;g/m^2$, n=36, p<0.01). In heading stage, vegetation growth at LF went close to it at CF as ratio of 80%~95%. The nitrogen content estimation model was also established (R=0.650, RMSE=$1.73\;g/m^2$, n=35, p<0.01) and there were significant difference of spatial variability between LF and CF. There were not significant difference of rice taste and it's elements, when three samples, which were more than twice of standard deviation, were excepted. The protein contents estimation model using GNDVI of before harvesting (R=0.700, RMSE=0.470%, n=29, p<0.01) were more suitable to predict the protein contents at harvesting comparing with it of heading stage(R=0.610, RMSE=0.521%, n=29, p<0.01).

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References

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