Evaluation Of Growth,Fruit Quality And Yield In Different Scion-rootstock Combinations For Apple (Malus Pumila Mill) In Weibei

Apple dwarfing-closing planting has the characteristics of early fruit bearing,high yield and easy management,and the application of dwarfing interstock is the main method of dwarfing in apple production in our country.Due to the poor resistance of dwarfing interstock and dwarfing rootstock,the requirements for the management of soil,fertilizer and water are high,and due to the different foundation conditions of fertilizer and water in different regions,how to choose scion-rootstock combinations has become the main problem that restricts the development of apple industry in our province.Qianxian is located in the north of the central part of shaanxi guanzhong plain,the southern edge of weibei plateau.Because of high terrain,large temperature difference between day and night,the climate is suitable for apple growth.Test was based on qianxian test station,stock M26,M9-T337 and SH series were introduced,with five short branch Fuji types including miyazaki short branch,shifu short branch,aomori short branch S,yanfu 6 and jin 18 and four long branch Fuji types including yanfu 3,yanfu 10,shou Fuji and Fuji guanjun,tree growth,fruit quality and output of various scion-rootstock combinations were comprehensively test,the optimum combination suitable for planting in weibei region was selected preliminarily.The main results were as follows:1.The SH38 interstock was suitable for aomori short branch S and yanfu 6,with moderate tree potential,high proportion of medium and short branches,high fruit quality,high yield and excellent comprehensive performance,which was a good scion-rootstock combination in weibei region.The trees of miyazaki short branch with SH38 interstock were robust,with high proportion of short shoot and high yield,but the fruit quality was average and the comprehensive performance was good,which was suitable for planting in weibei.2.Miyazaki short branch and aomori short branch S combined with M9-T337 rootstock showed better comprehensive performance,with strong tree potential and high yield,but the fruit quality was average.3.The comprehensive performance of yanfu 3 with SH16 rootstock was good,with moderate tree potential,high proportion of medium and short branches,good fruit quality and high yield,which was a good scion-rootstock combination in weibei region.Yanfu 10 matched with rootstock had moderate tree potential,with high proportion of medium and short branches and high yield,but the fruit quality was relatively average,and the comprehensive performance was more suitable for weibei region.4.Yanfu 10 was also suitable to be matched with SH38 interstock,with robust tree potential,reasonable branch distribution,high fruit quality,high yield and excellent comprehensive performance,and it was a scion-rootstock combination with good adaptability in weibei region.5.For other varieties of short scion types and long scion types,no suitable stock type,which could make the comprehensive performance of the combination well,was found in this experiment.