한국유기농업학회지 (Korean Journal of Organic Agriculture)

  • 제25권4호
  • /
  • Pages.805-819
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  • 2017
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  • 1229-3571(pISSN)
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  • 2287-819X(eISSN)
한국유기농업학회 (Korean Association of Organic Agriculture)
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ORYZA2000을 이용한 유기 벼 재배 시스템의 질소 동태 및 벼 생육 모의

Modelling N Dynamics and Crop Growth in Organic Rice Production Systems using ORYZA2000

  • 신재훈 (농촌진흥청 국립농업과학원 기획조정과) ;
  • 이상민 (농촌진흥청 국립농업과학원 유기농업과) ;
  • 옥정훈 (농촌진흥청 국립농업과학원 유기농업과) ;
  • 남홍식 (농촌진흥청 국립농업과학원 유기농업과) ;
  • 조정래 (농촌진흥청 국립농업과학원 유기농업과) ;
  • 안난희 (농촌진흥청 국립농업과학원 유기농업과) ;
  • 김광수 (서울대학교 농업생명과학대학)
  • 투고 : 2017.08.28
  • 심사 : 2017.10.23
  • 발행 : 2017.11.30
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초록

The study was carried out to develop a mathematical model for evaluating the effect of organic fertilizers in organic rice production systems. A function to simulate the nitrogen mineralization process in the paddy soil has been developed and integrated into ORYZA2000 crop growth model. Inorganic nitrogen in the soil was estimated by single exponential models, given temperature and C:N ratio of organic amendments. Data collected from the two-year field experiment were used to evaluate the performance of the model. The revised version of ORYZA2000 provided reasonable estimates of key variables for nitrogen dynamics and crop growth in the organic rice production systems. Coefficient of determination between the measured value and simulated value were 0.6613, 0.8938, and 0.8092, respectively for soil inorganic nitrogen, total dry matter production, and rice yield. This means that the model could be used to quantify nitrogen supplying capacity of organic fertilizers relative to chemical fertilizer. Nitrogen dynamics and rice growth simulated by the model would be useful information to make decision for organic fertilization in organic rice production systems.

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참고문헌

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