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1 树体结构指标 树体的基本结构要求是 :大枝要稀且开张 ,小枝要密且短粗。其数量化要求是 ,大枝间距 80～ 10 0ｃｍ ,层间距 10 0～ 12 0ｃｍ ,中枝间距 4 0～ 6 0ｃｍ ,小枝间距 15～ 30ｃｍ。2 梨树树体健壮指标 (以雪花梨为例 )2 1 外部树相指标 1)树冠中下部新梢平
A tree structure index The basic structural requirements of the tree are: large branches and open, branchlets should be dense and short and thick. The number of requirements is that the major branch spacing 80 ~ 10 0cm, layer spacing 10 0 ~ 120 cm, middle branch spacing 40 ~ 60 cm, branchlets spacing 15 ~ 30cm. 2 pear tree robust index (snow pear) 2 1 external tree index 1) crown in the lower shoots flat