The effect of chilling, defoliation and hydrogen cyanamide on dormancy release, bud break and fruiting of Anna apple cultivar
DOI: 10.1016/J.SCIENTA.2008.05.015
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摘要: Abstract The effect of defoliation (DEF) alone or combined with hydrogen cyanamide (HC) on dormancy state, fruit quality and yield Anna apple cultivar was studied. Trees were manually defoliated three successive dates, November 15th, December 1st 15th. flower buds (FB) entered the endodormancy synchronized vegetative (VB) for most treatments. Most treatments terminated between January 27th February 8th during season 2004/2005 18th 2005/2006. effective in release FB somewhat VB. Defoliation 15th + HC recorded lowest chilling accumulation needed to reach 50% bud break. All exceeded control considering percentage (FBB) break (VBB) either lab at field. Growing degree hours number days required each stage fruiting differed two studied seasons. DEF 15th all regarding initial set (IFS). gave highest (kg/tree). Defoliation + HC best quality, while least values.
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