夏季修剪对夏黑无核葡萄花芽形成与产量的影响_论文范文网 关键词：夏黑无核；夏季修剪；花芽形成；产量 [gap=904]Key Words: Summer Black seedless; Summer Pruning; flower bud differentiation; fruit
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The major part of summer pruning is the upper half of crowns of apple trees.
夏季修剪的主要部位是树冠的上半部。
Summer pruning devitalises the tree on an extent and consequently reduces excessive vigour.
夏剪能在一定程度上减弱植株的生命力，从而削弱过分的生长势。
Measures for protection to frost are proposed, including selecting favorable topography and frost-resistant cultivars, smoking and summer pruning.
提出预防霜冻的措施，主要包括：选择有利地形、选择抗霜冻品种、采取熏烟和夏季修剪等措施。
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