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      Flowering of kiwifruit (Actinidia deliciosa) is reduced by long photoperiods

      Snelgar, W. P.; Clearwater, Michael J.; Walton, E. F.
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      Clearwater Flowering of kiwifruit.pdf
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      DOI
       10.1080/01140670709510165
      Link
       www.royalsociety.org.nz
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      Citation
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      Snelgar, W. P., Clearwater, M. J. & Walton, E. F. (2007). Flowering of kiwifruit (Actinidia deliciosa) is reduced by long photoperiods. New Zealand Journal of Crop and Horticultural Science, 35(1), 33-38.
      Permanent Research Commons link: https://hdl.handle.net/10289/2739
      Abstract
      Mature kiwifruit (Actinidia deliciosa ‘Hayward’) vines grown under standard orchard management were exposed to 16-h photoperiods from the longest day in summer until after leaf fall in autumn. Photoperiod extension was achieved with tungsten halogen lamps that produced 2–8 µmols m–2 s–1 photosynthetically active radiation. Long day treatments did not affect fruit dry matter or fruit weight at harvest during the growing season that the treatments were applied or during the following growing season. However, flowering was reduced by 22% during the spring following treatment application. As this reduction in flowering was not accompanied by a decrease in budbreak, the long day effect is not consistent with a delay in the onset of winter chilling. It is suggested therefore, that the observed reduction in flowering may be because of a diminution of floral evocation.
      Date
      2007
      Type
      Journal Article
      Publisher
      RSNZ Publishing
      Rights
      This article has been published in the journal: New Zealand Journal of Crop and Horticultural Science. © 2007The Royal Society of New Zealand. Use with permission.
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      • Science and Engineering Papers [3122]
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