Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Determination of Nitrogen Application Rates with Paddy Soil Types for Production of High Rice Quality

고품질 완전미 생산을 위한 논 토양유형별 질소 시비량

  • Received : 2006.02.02
  • Accepted : 2006.02.20
  • Published : 2006.04.30
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Abstract

The primary concern on fertilizer recommendations on paddy soils in Korea is not high rice yield but high rice quality, sustainable rice yield, and less environmental loads these days. Based on soil survey data, the paddy soils in Korea were classified into five large management types ; normal, sandy, immatured, poorly drained, saline soil. In order to establish the optimum level of nitrogen fertilizer to increase the rate of head rice yield, field experiments were conducted at 24 farmhouses throughout the country with nitrogen fertilizer treatment levels of 0, 50, 70, 90, 110, 140, $170kg\;ha^{-1}$ from 2003 to 2004. As the result of the experiment, the optimum rates of nitrogen fertilizer for improving rice quality were $90kg\;ha^{-1}$ in normal, sandy, and poorly drained soils, $100kg\;ha^{-1}$ in immatured soils, and $112kg\;ha^{-1}$ in saline soils where the content of NaCl in soil was below 0.1%. The optimum rates of nitrogen fertilizer were determined in view of head rice percent, protein content, and palatability value of rice.

우리나라 고품질 완전미의 안전생산을 위한 적정 질소시비량을 설정하기 위하여 2003-2004년에 전국 24 농가포장을 대상으로 논토양 유형별로 재배시험을 수행하였다. 토양유형별 쌀 수량, 완전미 수량 및 단백질 함량은 질소시비수준이 증가할 수록 많아지는 경향이고, 토양유형별 완전미 비율 및 Toyo 식미치는 질소시비수준이 증가하면 오히려 낮아지는 경향을 보였다. 지역별로 본 수확기 실물체와 쌀의T-N 함량과 단백질함량도 질소 시비량 증가로 많아지는 반면, Mg/K 당량비는 오히려 질소 감비로 증가하는 경향이었다. 고품질미의 안전생산을 위하여 하향 조정된 논토양 유형별 질소의 적정시비량은 ha당 보통논, 사질논, 고논 80-100 kg(89 kg), 미숙논 90-110 kg (100 kg), 염해논(숙답) 100-130 kg(112 kg) 이었다.

Keywords

References

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