Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Effects of Application Time of GA Paste on Tree and Fruit Growth and Fruit Quality of 'Kamcheonbae' and 'Whangkeumbae' Pears

GA 도포제의 처리시기가 '감천배'와 '황금배'의 생육과 과실 품질에 미치는 영향

  • Youn, Cheol-Ku (Department of Horticultural Research, Chungbuk Provincial ARES) ;
  • Kim, Seon-Kyu (Department of Horticulture, Chungbuk National University) ;
  • Lim, Sang-Cheol (Department of Horticultural Research, Chungbuk Provincial ARES) ;
  • Kim, Hag-Hyun (Department of Horticulture, Chungbuk National University) ;
  • Kim, Young-Ho (Department of Horticultural Research, Chungbuk Provincial ARES) ;
  • Lee, Cheol-Hee (Department of Horticultural Research, Chungbuk Provincial ARES) ;
  • Choi, Kwan-Soon (Department of Horticultural Research, Chungbuk Provincial ARES)
  • Published : 2000.06.30
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Abstract

To clarify the effects of application time of $GA_{4+7}$ paste (GA paste) on tree and fruit growth, fruit quality, and maturity of 'Kamcheonbae' and 'Whangkuembae' pears, GA paste of 25 mg each was applied directly to fruit stalk 25, 35, and 45 days after full bloom (DAFB). Later application of GA paste tended to increase the fruit weight of 'Kamcheonbae' pear. GA paste applied 45 DAFB increased the titratable acidity of the two cultivars. Fruit firmness of 'Kamcheonbae' was not affected by the GA paste treatment, while that of 'Whangkuembae' was increased by more than 20%. Fruit maturity of the two cultivars was hastened for 4 days by the GA paste treatment at any application time. Sharp increase in the fruit weight of the GA paste-treated 'Kamcheonbae' was noted from early July while that of control exhibited slow increase from early September. The initial growth pattern of 'Whangkeumbae' was similar to that of 'Kamcheonbae', but the growth slowed down from early September, regardless of the treatments.

$GA_{4+7}$ 도포제의 처리시기가 '감천배'와 '황금배'의 생육과 과실의 품질 및 성숙에 미치는 영향을 구명하기 위하여 만개 후 25일, 35일 및 45일에 과경에 25 mg을 도포하였다. '감천배'의 과중은 처리시기가 늦어질수록 무거워지는 경향을 보였다. 두 품종 모두 산도는 만개 후 45일 처리구에서 가장 높았으며, 경도는 '감천배'는 유의성이 없었으나 '황금배'는 처리로 증가하였다. 숙기는 두 품종 모두 4일 촉진되었다. '감천배'는 7월 상순경부터 모든 처리구에서 과중이 급격히 증가한 것에 비해, 대조구에서는 9월 상순 이후 완만한 증가를 보였다. '황금배'에서도 같은 경향이었으나, 9월 상순 이후부터 처리에 관계없이 모든 처리구에서 과중의 증가가 둔화되었다.

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