上层骨干枝枝型指数对乔化苹果内膛光照的影响疏除树冠内膛直立枝和外围竞争枝，可改善树体光照条件；
The Influence of Upper Scaffold Branch Index on the Interior Ligh Exposure within Apple Tree Canopy It could improve illuminant conditions to wipe out erect shoots in the crown and compete shoots outside the crown .
竞争枝