Effects Of Branch Bending Angle On Carbon,Nitrogen And Endogenous Hormones Contents In Buds And Leaves Of Apple Trees

Branch bending become the indispensable method in Fruit trees trimming,Because of it can reduce tree top advantage, adjust belancsd relations, promote into flowers. Currently, branch bending applies Fuji apple tree of prostagland and young plastic modification in China of shaanxi province, henan, shanxi areas, and it becomes an effective solution to the problem of the Fuji apple difficult to flowers. But it also caused main branch base of flourishing, and tree branches easy to premature after Branch Bending.The experiment used different angles traetments of branch bending for Fuji apple and ga la, mainly studied the following three aspects:1. Studied the nutrients content changes of the growth period of apple tree, short branch of terminal bud, long branches-axillary buds, Short branches leaves and long branches leaves after branch bending2. Studied the changes in the content of endogenous hormones and the balance of Hormone inshort branch of terminal bud, long branches-axillary buds, Short branches leaves and long branches leaves after Branch Bending3. Quantize the effects of branch bending to the nutrient content and the balance of endogenous hormones, to determine the reasonable perspective of branch bending for beneficial to flower bud differentiation, ensure the stable yield , and can keep vigorous growth of tree, clear the application effect in practical production, and provide theoretical basis for plastic of young trees and plastic of mature tree .Main results are as follows:1. Soluble sugar content and starch content of leaves and buds increased with the angle of branch bending increasing , And showed a significant differences, the angle of branch bending increasing Fuji leaves and nitrogen content of buds gradually reduced, the nitrogen 110°of Ga la in leaves and bud were close to the nitrogen 110°, but were less than 70°significantly. the average was 10 of the C/N in short branch of terminal bud of Ga la 90°. the average was 9.81 of the C/N in short branch of terminal bud of Fuji 110°, According to the theory of C/N theory, This shows that Ga la in smaller of angle of branch bending can achieve high C/N than Fuji, however, althrough increased the angle of branch bending beneficial to flower formation,But easy to cause the main branch aging in advance, and against orchard construction.2. The positive correlation between the angle of branch bending and ZR and ABA. significant negative correlation were observed between the angle of branch bending Ga and IAA, ABA/IAA, ABA/GA, ZR/IAA. ZR/GA showed an increasing tendency with the angle of branch bending increased, especially in the short branch of terminal bud, ratio rised obviously, the average of ABA/IAA, ABA/GA, ZR/GA in short branch of terminal bud of Fuji 110°less than Ga la 90°, and ZR/IAA is closed to Ga la 90°, This showed that compared to the Fuji, Ga la can improve promoting flowering hormone levels in smaller angle of branch bending, reduce inhibitory flowering hormone levels, reach beneficial to the Hormonebalance of bud differentiation.In sum, This test attempts to make a conclusion that the angle of branch bending of Fuji 110°and Ga la 90°were not only beneficial to bud differentiation but without causing premature senility, which is the reasonable perspective in production. the management level is not high in the orchard, Excessive branch bending easy to cause the tree premature senility, against the long-term development of the orchard, In good condition with water and fertilizer, there is a guarantee of stable yield in the orchard combined with reasonable branch bending.