한국작물학회지 (KOREAN JOURNAL OF CROP SCIENCE)

한국작물학회 (The Korean Society of Crop Science)
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일품벼 도정 및 쌀 품질 향상을 위한 분시비율 개선연구

Improving Grain Quality by Controlling Top Dressing of Nitrogen Application Ratio

  • 원종건 (경상북도 농업기술원) ;
  • 안덕종 (경상북도 농업기술원) ;
  • 김세종 (경상북도 농업기술원) ;
  • 최충돈 (경상북도 농업기술원) ;
  • 이상철 (경북대학교 농업생명과학대학 식물생명과학부)
  • Won, Jong-Gun (Gyeongbuk Agricultural Research & Extension Services) ;
  • Ahn, Duok-Jong (Gyeongbuk Agricultural Research & Extension Services) ;
  • Kim, Se-Jong (Gyeongbuk Agricultural Research & Extension Services) ;
  • Choi, Chung-Don (Gyeongbuk Agricultural Research & Extension Services) ;
  • Lee, Sang-Chul (Division of Plant Bioscience, College of Agriculture and Life Science, Kyungpook National University)
  • 발행 : 2008.12.31
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초록

일품벼에서 많이 발생되고 있는 분상질미를 경감시켜 외관상 품위 및 도정수율을 향상시키고, 쌀의 단백질 함량을 줄여 품질을 향상시킬 수 있는 재배방법을 개발코자 질소 분시비율을 조정하여 시험한 결과는 다음과 같다. 1. 최고 분얼기의 경수는 기비와 분얼비의 영향을 많이 받았으며 엽면적지수 또한 같은 경향을 보였으나, 출수기의 경수 및 엽면적 지수 등은 수비의 영향을 많이 받았다. 2. 수량 및 수량구성요소는 대체로 수비의 영향을 많이 받아 수장, 영화수, 백미 수량 등은 수비 시비량의 증감과 일치하는 경향이었다. 3. 쌀의 이화학적 특징은 단백질 함량이 수비 시비량이 많을수록 높아졌고, 특히 분상질미, 피해립이 차지하는 비율이 현저히 높아져 완전미율은 낮아지는 경향이었다. 4. 따라서 쌀의 외관상 품위 및 도정 특성은 총질소 시비량이 동일할 경우 수비의 시비량을 50% 감비하여 시용한 구에서 향상되었으며, 완전미 수량도 높았다.

This study was carried out to improve the rice grain quality of Ilpum cultivar, especially to reduce the chalky rice rate by controlling top dressing of nitrogen application ratio at the tillering and panicle initiation stage. In the rice plant growth, the number of tiller and leaf area index of maximum tillering stage were influenced by basal dressing and top dressing at tillering stage; however those of heading stage were mainly influenced by top dressing at panicle initiation stage. In yield and yield components, they were influence by the top dressing at panicle initiation stage and the rice yield was increased by percentage of the top dressing. The protein content of rice grain was increased as the rate of top dressing at panicle initiation stage was increased. The rate of chalky and damaged rice was remarkably increased as the top dressing ratio was increased, resulting in reducing the rate of head rice rate. As the results, the characteristics of milling and rice quality was improved when the amount of top dress was reduced as 50% at the panicle initiation stage, and the yield of head rice also increased.

키워드

참고문헌

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