KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Effect of Salicylic Acid and Abscisic Acid on Drought Stress of Waxy Corn

찰옥수수 한발 스트레스에 대한 살리실산과 앱시식산의 처리 효과

  • Seo, Youngho (Gangwon Agricultural Research & Extension Services) ;
  • Park, Kijin (Gangwon Agricultural Research & Extension Services) ;
  • Chang, Eunha (Gangwon Agricultural Research & Extension Services) ;
  • Ryu, Sihwan (Gangwon Agricultural Research & Extension Services) ;
  • Park, Jongyeol (Gangwon Agricultural Research & Extension Services) ;
  • Kim, Kyunghi (Gangwon Agricultural Research & Extension Services)
  • 서영호 (강원도농업기술원 옥수수연구소) ;
  • 박기진 (강원도농업기술원 옥수수연구소) ;
  • 장은하 (강원도농업기술원 옥수수연구소) ;
  • 류시환 (강원도농업기술원 옥수수연구소) ;
  • 박종열 (강원도농업기술원 옥수수연구소) ;
  • 김경희 (강원도농업기술원 옥수수연구소)
  • Received : 2013.09.23
  • Accepted : 2013.12.11
  • Published : 2014.03.30
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Abstract

Climate change may result in greater risk of yield reduction of waxy corn due to drought stress and maize is one of the sensitive crops to the soil moisture shortage. While irrigation is the most effective practice to reduce the drought damage, farmers are unable to apply water due to limited water resource and irrigating facilities. The study was conducted to investigate the application effect of salicylic acid and abscisic acid on reducing drought stress of waxy corn (Zea mays L.). Drought stress was imposed by withholding irrigation from 9 days before anthesis to 14 days after anthesis. Salicylic acid or abscisic acid was applied on tasseling date at concentration of 0.5 mM and 0.1 mM, respectively. Drought stress increased anthesis-silking interval (ASI) by 3.0~3.3 days and decreased plant height, ear length, ear diameter, number of rows in ear, and yield by 47~51 cm, 4.6~5.0 cm, 4.4~5.3 mm, 1.5~2.0, and 2.4~2.5 Mg/ha, respectively. Application of salicylic acid and abscisic acid did not significantly reduced the drought injuries of waxy corn. Pretreatment of the plant growth regulators before water deficit stress or divided application at low concentration may be required to obtain the reduction effect on drought stress of waxy corn.

물 자원이 제한되거나 관수 설비가 갖추어지지 않은 곳에서 찰옥수수의 한발 피해를 줄이고자, 종실용 옥수수에 대한 수분 스트레스 경감 효과가 보고되어진 살리실산과 앱시식산의 처리 효과를 살펴보았다. 출웅기 9일 전부터 출웅 후 14일까지 관수를 중단하였으며, 생장조절제는 출웅기에 1회 처리하였다. 살리실산과 앱시식산의 처리 농도는 각각 0.5 mM과 0.1 mM이었다. 한발 처리에 의해 ASI가 3.0~3.3일 늘어났으며, 간장은 47~51 cm, 이삭장은 4.6~5.0 cm, 이삭경은 4.4~5.3 mm, 열수는 1.5~2.0개, 수량은 2.4~2.5 Mg/ha 줄었다. 살리실산과 앱시식산의 처리에 의한 한발 피해의 경감 효과는 뚜렷하지 않았다. 찰옥수수에 대한 살리실산과 앱시식산의 한해 경감 효과를 위해서는 수분 부족 스트레스를 받기 이전에 처리하거나, 저농도로 몇차례에 나누어 처리하는 것이 필요한 지에 대한 추후 검토가 필요하다.

Keywords

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