果樹修剪英文版ppt課件-文庫吧資料
2025-01-19 14:48本頁面
【正文】 to minimize disease pressure Facilitate Management: 2. Distribute Scaffolds Well ?Easy entry to tree ?Thinning, pruning, harvesting ?Good pesticide coverage Facilitate Management: 3. Tree Uniformity ?Easier to train employees ?Mechanization possible Facilitate Management: 4. Tree Size ?Small trees are easier to work ? No ladders needed ? Easy to reach all parts of tree ?Better spray peration Facilitate Management of the Tree and Crop ? Optimize height of primary scaffolds ?Allow space at tree base ? Distribute scaffolds well ?Do not over crowd scaffolds ? Tree uniformity ? Limit tree size with summer and winter pruning C. Harvest Sunlight Efficiently ?Maximize surface area of orchard covered by canopy ?Limit canopy depth Harvest Sunlight Efficiently: 1. Maximize surface area of orchard covered by canopy Most rapid in high density plantings Harvest Sunlight Efficiently: 2. Limit Canopy Depth 0102030405060708090100% Light Penetration0 1 2 3 4 5 6 7 8 9C an op y D e p th (f e e t)50% 30% Light Intensity Decreases Within the Tree Canopy Harvest Sunlight Efficiently: 2. Limit Canopy Depth Photosynthesis Decreases at Lower Light Levels 0102030405060708090100% Maximum Photosynthesis0 10 20 30 40 50 60 70 80 90
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