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该文以魏县梨树主产区示范园为试验材料,对梨树大冠稀植和中冠密植采用的疏散分层形树形进行了树体改造试验。经过多年研究,提出了适宜冀南梨区采用的树形——开心形和单层一心形,经过4a在全县主产区示范应用,取得了产量稳定、品质优良的良好结果。2008～2010年,通过对核心试验区前罗庄试验树调查,提出了开心形和单层一心形的树相指标:全树选留3～4个主枝,单株结果枝组总量80个左右,每公顷总枝量控制在67.5万个,叶面积系数为1.9左右;每公顷产量为57396.6kg。
In this paper, the main production area of Weixian pear garden demonstration park as the experimental material, pear crowns and Guanzhong densely populated densely populated dendritic tree shape transformation experiment. After many years of research, the paper presents the tree-shaped and happy-heart-shaped one-heart-shaped which is suitable for the pear market in Hebei Province. After 4a, it has been applied in the main producing areas of the county for good results. From 2008 to 2010, through the investigation of the former Luozhuang experimental tree in the core experimental area, the happy-shaped and single-layer, one-heart-shaped tree-like indexes were proposed: 3 to 4 main branches were selected for the whole tree selection, A total control of about 675,000 per hectare branches, leaf area factor of about 1.9; yield per hectare 57396.6kg.