树木的整形与修剪英文版.ppt

Training and Training and Pruning Basics Pruning Basics Objectives and Tools Strong Tree Framework Balanced Renewal Facilitate Management Harvest Sunlight Efficiently Maintain Productivity What happens if you do not What happens if you do not prune? prune? ? Faster growth ? Earlier fruiting ? Less light ration ? Poor spray coverage ? More difficult to manage Objectives of training Objectives of training ? A. Establish a strong tree framework ? B. Facilitate management of tree and crop ? C. Harvest sunlight efficiently ? D. Maintain productivity ? by renewing fruiting wood Balanced Renewal A. Establish a Strong Tree A. Establish a Strong Tree Framework Framework ? Upright vertical trunk ? Well distributed scaffolds ? Wide crotch angles Structural Wood Establish a Strong Tree Framework Establish a Strong Tree Framework Vertical trunk Well Distributed Scaffolds Establish a Strong Tree Framework Establish a Strong Tree Framework ? Wide branch angles are stronger ? Narrow angles are weak and increase shading inside canopy A Strong Tree Framework: A Strong Tree Framework: ? Major objective of the first three years ? Must last the lifetime of the tree ? Structural support for fruit crop ? Should not be crowded B. Facilitate Management of B. Facilitate Management of the Tree and Crop the Tree and Crop ? Height of primary scaffolds ? Distribute scaffolds well ? Tree uniformity ? Tree size Facilitate Management: Facilitate Management: 1. Height of Primary Scaffolds 1. Height of Primary Scaffolds ? Access to tree base ? Irrigation, herbicides, fertilizers ? Allow air movement to minimize disease pressure