KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Effect of Additional Nitrogen Fertilizer Application on Decreasing of Preharvest Sprouting in Winter Wheat

질소 추비시용이 밀 수발아 억제에 미치는 영향

  • Kim, Young-Jin (Department of Rice and Winter Cereal Crop, National Institute of Crop Science, RDA) ;
  • Kim, Hag-Sin (Department of Rice and Winter Cereal Crop, National Institute of Crop Science, RDA) ;
  • Kang, Cheon-Sik (Department of Rice and Winter Cereal Crop, National Institute of Crop Science, RDA) ;
  • Kim, Kyoung-Hun (Department of Rice and Winter Cereal Crop, National Institute of Crop Science, RDA) ;
  • Hyun, Jong-Nae (Department of Rice and Winter Cereal Crop, National Institute of Crop Science, RDA) ;
  • Kim, Kee-Jong (Department of Rice and Winter Cereal Crop, National Institute of Crop Science, RDA) ;
  • Park, Ki-Hun (Department of Rice and Winter Cereal Crop, National Institute of Crop Science, RDA)
  • 김영진 (농촌진흥청 국립식량과학원 벼맥류부) ;
  • 김학신 (농촌진흥청 국립식량과학원 벼맥류부) ;
  • 강천식 (농촌진흥청 국립식량과학원 벼맥류부) ;
  • 김경훈 (농촌진흥청 국립식량과학원 벼맥류부) ;
  • 현종내 (농촌진흥청 국립식량과학원 벼맥류부) ;
  • 김기종 (농촌진흥청 국립식량과학원 벼맥류부) ;
  • 박기훈 (농촌진흥청 국립식량과학원 벼맥류부)
  • Received : 2013.02.08
  • Accepted : 2013.03.14
  • Published : 2013.06.30
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Abstract

Preharvest sprouting seriously reduces milling and baking quality of hard winter wheat (Triticum aestivum L.) grain. To determine the effect of nitrogen fertilizer application on decreasing of preharvest sprouting, several levels of N-fertilization were conducted in two winter wheat cv. Keumkang and Jokyung, grown in Iksan. Nitrogen fertilization is used to increase grain yield and protein content. Grain yield increased at 108kg/ha (50% increased nitrogen to the standard) application and decreased as more nitrogen was applied. There was a linear increase in grain protein contents with increasing level of nitrogen application. Germination rate, germination index and ABA sensitivity were gradually reduced by increasing of nitrogen application level. Preharvest sprouting showed a significantly correlation to germination rate but could not be correlated to protein content and falling number. A significant positive correlation was detected between preharvest sprouting and different additional nitrogen fertilizer levels.

본 연구는 질소 추비 시용수준을 달리한 비배관리가 수발아에 미치는 영향을 구명코자 금강밀과 조경밀을 공시하여 질소 추비 처리 수준별로 출수기, 생육, 종실특성 및 수발아 관련 형질을 비교하였다. 질수수준 증가에 따라 간장, 수장, 경수 및 영화수가 증가했으나, 임실율은 2010년에는 질소 50% 증비(108 kg N/ha)에서 가장 높은 수치를 나타냈고, 2011년에는 100% 증비(144 kg N/ha)에서 가장 높은 수치를 나타냈다. 밀 종실 특성 중 천립중, 리터중 및 수분함량은 질소수준에 따라 큰 차이를 보이지 않았으나, 종실 수량은 질소 수준이 증가함에 따라 계속 증가하여 50% 증비에서 가장 높게 나타났으며 그 이후부터는 감소하였다. 종실의 단백질 함량을 살펴보면 질소수준이 증가함에 따라 점차 증가는 경향을 보였으며 100% 증비에서 가장 높은 함량을 나타냈고, 금강이 조경보다 높은 단백질 함량을 보였다. 밀 종자의 수발아 관련 형질간 비교에서는 질수수준이 증가함에 따라 발아율, Germination index 및 ABA sensitivity가 점차 감소했는데, 이는 종자의 수발아율을 낮추는 결과를 가져왔다. 밀 종자의 Germination index는 금강의 경우 무비(추비)에서 가장 높게 나타났으며 그 이후에는 조경의 경우와 마찬가지로 질소 수준이 증가함에 따라 점차 감소하였다. 밀 종자의 수발아율은 조경의 경우 50% 감비에서 24.7%, 금강의 경우 무비(추비)에서 19.6%로 가장 높게 나타났으나, 질소 처리 수준이 증가함에 따라 수발아율은 점차 감소하였다. ABA sensitivity와 수발아율 간에는 정의 상관을 나타내어 ABA sensitivity를 간이 수발아 검정법으로 활용 가능할 것으로 보였다.

Keywords

References

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