Effect of High Night Time Temperatures on Flowering Period of Spray-Chrysanthemum cv. 'Euro' During Summer Season

여름철 동안 야간 고온이 스프레이국화 '유로(Euro)'의 개화시기에 미치는 영향

  • Kim, Yoon-Ha (School of Applied Biosciences, Kyungpook National University) ;
  • Lee, In-Jung (School of Applied Biosciences, Kyungpook National University)
  • 김윤하 (경북대학교 농업생명과학대학 응용생명과학부) ;
  • 이인중 (경북대학교 농업생명과학대학 응용생명과학부)
  • Received : 2012.11.08
  • Accepted : 2013.03.11
  • Published : 2013.03.31

Abstract

This study identified the effect of night time temperatures on the flowering period of spray-chrysanthemum during the summer season in South Korea. According to the results for 2005, the temperature at night time sustained more than $25^{\circ}C$ for 23.6 days during the short day period and delayed the flowering period for 22 days. Similar observations were reported in 2006, as the night time temperature sustained more than $25^{\circ}C$ for 23.6 days during the short day period and delayed flowering period for 23 days. The results for 2007 year showed that night time temperature sustained more than $25^{\circ}C$ for 31.9 days during the same period and delayed flowering for 31 days. In conclusion, based on the results for 2005 to 2007, a specific correlation was found between high night time temperatures and a delayed flowering period for the 'Euro' spray-chrysanthemum.