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新树形 为适应果树生产密植、早产、丰产的需要,山东省阳信县已故鸭梨专家朱长祥试验并推广了基部二主枝小冠疏层树形。该树形基部第一层有二个主枝,与行向成45度角伸向行间。每一主枝上培养三个侧枝,其它枝为永久性或临时性辅养枝,根据情况或去或留。第一层之上1米左右再培养二个主枝,作为二层主枝。每一主枝上有二个侧枝。在当前阳信县推广的24—5为的栽植密度下,这一形状的树对光照、热能等利用率高,果品产量高、品质优。
In order to meet the need of close planting, premature birth and high yield of fruit trees, Zhu Changxiang, a deceased pear expert in Yangxin County, Shandong Province, experimented and popularized the degenerative tree of the two main branches and small crowns. There are two main branches on the first floor of the tree-shaped base, extending to the line at an angle of 45 degrees to the line. Three branchlets are cultivated on each main branch. The other branch is a permanent or temporary branch, depending on the situation or to go or stay. The first layer of about 1 meters and then cultivate two main branches, as a two-story main branch. There are two side branches on each main branch. Under the planting density of 24-5 popularized in current Yangxin County, the tree of this shape has high utilization rate of light and heat energy, high fruit yield and good quality.