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《Journal of Northwest A & F University(Natural Science Edition)》 2011-01
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Effect of renewal pruning on apple photosynthetic ability and fruit quality in final full productive stage

LI Ming-xia1a,GENG Gui-jun2,BAI Gang-shuan2,1b,DU She-ni2,1b,LI Jing-jing1(1 a College of Forestry,b Institute of Soil and Water Conservation,Northwest A&F University,Yangling,Shaanxi 712100,China;2 Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi 712100,China)  
【Objective】 The study was to investigate the effect of renewal pruning on photosynthetic ability and shoots growth,fruit quality of apple tree in final full productive stage.【Method】 In Weibei Plateau,renewal pruning and long branch pruning(control) on final full productive stage,photosynthetic ability of different shoots with two types of pruning were measured by LI-6400 photosynthetic,and shoot growth and related indicators of fruit quality were measure.【Result】 The diurnal variation of photosynthetic rate and stomatal conductance of bourse shoot,leafage shoot and vegetative shoot all showed bimodal curve,the diurnal variation of transpiration showed single curve,and the diurnal variation of intercellular CO2 concentration showed "anti-parabola curve".Renewal pruning significantly increased photosynthetic rate,stomatal conductance and transpiration of different shoots;and significantly decreased intercellular CO2 concentration.Renewal pruning extremely signficant or significantly increased amount of long branch and medium branch,extremely significant or significantly increased fruit yields,fruit weight,fruit shape index and acid content,solule solids and the content of soluble sugar;and it had no significant effect on fruit firmness and vitamin C.【Conclusion】 Renewal pruning increased the photosynthetic ability of leaves,promoted shoots growth,and improved yields and fruit weight of apple tree in final full productive stage.
【Fund】: 中国科学院水利部水土保持研究所科研专项(C127);; 国家“十一五”科技攻关项目(2006BAD09B09 2006BAD09B07 2006BAJ10B06)
【CateGory Index】: S661.1
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