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《Guizhou Agricultural Sciences》 2010-07
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Quality of Fuji Apples on Different Crown Position

WU Ya-wei1,XIANG Qing-yun2,YANG Hua3,HE Xu-xiao1,HAN Xiu-mei1,CAI Yong-qiang1(1.Guizhou Fruit Institute,Guiyang,Guizhou 550006;2.Guizhou Fruit and Vegetable Station,Guiyang,Guizhou 550001;3.Weining Agricultural Bureau,Weining,Guizhou 553100,China)  
The external and internal quality indexes of apples on eight different positions of the crown were determined and five quality indexes were analyzed by gray correlation degree to comprehensively evaluate their fruit quality for providing reference to transform the shape of apple trees in old orchards.The results showed that the quality of apples on the middle and upper position of the crown was better than that on the lower position of the crown,the quality of apples on the middle and upper position of the crown towards north and south was the best,but the quality of apples on the lower position of the crown was the worst,and there was a little difference in quality of apples between the middle and upper position and the lower position towards east and west.The shape of apple trees in old orchards should be transformed by relative pruning technique to adjust and optimize the tree structure,improve light condition of trees,especially the lower position of the crown,and reduce the proportion of lower light utilization area of trees for raising light energy utilization rate of trees and high quality fruit rate.
【Fund】: 贵州省农业科技攻关项目“贵州山区精品水果基地建设暨配套技术研究”[黔科合字NY(2006)3003];; 贵州省农业科学院专项项目“苹果三优技术的引进与示范”[黔农科合(专项)09041]
【CateGory Index】: S661.1
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