Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Photosynthesis, Shoot Growth and Fruit Quality in 'Fuji'/M.9 Mature Apple Trees in Response to Prohexadione-calcium Treatments

Prohexadione-calcium 처리에 따른 성목기 '후지'/M.9 사과나무의 광합성, 신초생장 및 과실품질

  • Sagong, Dong-Hoon (Department of Horticulture, Daegu University) ;
  • Song, Yang-Yik (Apple Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Park, Moo-Yong (Apple Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Kweon, Hun-Joong (Apple Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Kim, Mok-Jong (Namhae Sub-Station, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Yoon, Tae-Myung (Department of Horticultural Science, Kyungpook National University)
  • 사공동훈 (대구대학교 원예학과) ;
  • 송양익 (농촌진흥청 국립원예특작과학원 사과시험장) ;
  • 박무용 (농촌진흥청 국립원예특작과학원 사과시험장) ;
  • 권헌중 (농촌진흥청 국립원예특작과학원 사과시험장) ;
  • 김목종 (농촌진흥청 국립원예특작과학원 남해출장소) ;
  • 윤태명 (경북대학교 원예과학과)
  • Received : 2013.01.23
  • Accepted : 2014.07.03
  • Published : 2014.12.31
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Abstract

This study was conducted to elucidate the influence of prohexadione-calcium (Pro-Ca) application on shoot growth and fruit quality in 'Fuji'/M.9 mature apple trees. Pro-Ca was applied at concentrations ranging from 100 to $400mg{\cdot}L^{-1}$ one time at petal fall (PF; 5-10 cm terminal shoot growth) to the whole canopy of the tree, or at 100, 125, $150mg{\cdot}L^{-1}$ concentrations two times, at PF and then 4-8 weeks after PF. Pro-Ca treatment generally reduced mean shoot growth, with its effect being proportional to the application rate. Pro-Ca at $400mg{\cdot}L^{-1}$ significantly reduced the shoot growth by 15-22% compared to the control, while its effect was not significantly different from Pro-Ca $200mg{\cdot}L^{-1}$. Pro-Ca treatments induced higher occurrence of secondary growth compared to the control. Pro-Ca treatment increased the photosynthetic rate by 5-10% relative to the control, and also increased soluble solid concentration and fruit red color. However, fruit weight was significantly reduced by $400mg{\cdot}L^{-1}$ Pro-Ca, which was attributable to the greater secondary growth caused Pro-Ca $400mg{\cdot}L^{-1}$ treatment compared to the control and Pro-Ca $200mg{\cdot}L^{-1}$ treatment.

본 시험은 prohexadione-calcium(Pro-Ca) 살포가 성목기 '후지'/M.9 사과나무의 신초생장 및 과실품질에 미치는 영향을 구명하고자 실시하였다. Pro-Ca은 $100-400mg{\cdot}L^{-1}$ 농도로 정단신초 길이가 5-10cm 정도 생장한 낙화기에 1회 수관전체 살포하거나 혹은 100, 125, $150mg{\cdot}L^{-1}$ 농도로 낙화기와 낙화 후 4-8주 경에 2회 살포하였다. 일반적으로 Pro-Ca 처리는 평균 신초장을 감소시켰으며, 그 정도는 처리농도에 비례하였다. 무처리에 비해 Pro-Ca $400mg{\cdot}L^{-1}$ 처리는 평균 신초장을 15-22% 정도 감소시켰으나, Pro-Ca $200mg{\cdot}L^{-1}$ 처리와는 차이가 없었다. 신초의 2차 생장발생률은 Pro-Ca 처리구가 무처리보다 높았다. 무처리에 비해 Pro-Ca 처리는 광합성속도를 5-10% 정도 향상시켰고, 또한 가용성 고형물 함량과 착색을 증진시켰다. 그러나 $400mg{\cdot}L^{-1}$ 처리는 과중을 유의하게 감소시켰는데, 이는 Pro-Ca $400mg{\cdot}L^{-1}$ 처리구의 신초 2차 발생률이 무처리 및 Pro-Ca $200mg{\cdot}L^{-1}$ 처리구 보다 높았기 때문이었다.

Keywords

References

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