KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Response of Rice Yield and Grain Quality as Affected by Rice Leaf Folder

혹명나방 피해 정도에 따른 벼 수량 및 미질 반응

  • 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)
  • 원종건 (경상북도농업기술원) ;
  • 안덕종 (경상북도농업기술원) ;
  • 김세종 (경상북도농업기술원) ;
  • 최충돈 (경상북도농업기술원) ;
  • 이상철 (경북대학교 농업생명과학대학 식물생명과학부)
  • Published : 2008.12.31
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Abstract

This study was carried out to determine the response of the rice yield and grain quality by rice leaf folder (RLF, Cnaphalocrocis medinalis G.) and identify the damages caused by different transplanting dates, nitrogen amounts and chlorophyll amounts (SPAD value) of rice leaf. As the damage degree of RLF was getting severer, the ripened grain rate and 1000-grain weight were decreased and due to the increasing of chalky rice rate the rate of head rice was reduced. Therefore, the yield of head rice was decreased by 36% in heavily damaged rice plant. Among the physicochemical characteristics, protein content of rice grain was increased but amylose content was reduced, consequently, the palatability was deteriorated in heavily damaged rice by RLF. The degree of damage of RLF was getting serious as transplanting date was delayed and as the amount of nitrogen was increased. In the relationship between the SPAD value and the damage degree of RLF, as the SPAD value was increased by nitrogen fertilizing, the damage degree was also increased exponential functionally.

Keywords

References

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