核桃树冬季修剪极易引起伤流,使树体水分和贮藏养分大量流失,导致树势衰弱,甚至枝条枯死,严重影啊树体正常生长和结果.核桃树伤流主要发生在休眠期;果实生长期有一定伤流;芽体萌动至盛花期,果实采收至落叶期内基本没有伤流.因此,整形修剪宜选在秋季果实采收后至落叶期和春季 The pruning of walnut trees in winter can easily lead to wounds, causing a large loss of water and storage nutrients in the tree body, leading to the weakening of the tree and even the withering of the branches, which seriously affect the normal growth and results of the tree. There is a certain injury in the growth phase; germination buds bloom flowering, fruit harvest to the deciduous period basically no wound. Therefore, the plastic trim should be selected in the autumn fruit harvest to the deciduous and spring