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Effects of Cutting Back，Branch-bending and Bud-notching Treatments on Endogenous Hormones in the Buds of Fuji Apple Effects of Cutting Back Pruning Degree on Distribution and Utilization of 13C and 15N for Prunus avium‘Hongdeng’ Effects of Cutting Back，Branch-bending and Bud-notching Treatments on Endogenous Hormones in the Buds of Fuji Apple The Influence of Cultivation Conditions on the Growth and DevelopmentofPennisetum a lopecuroides