苹果树上强苹果树高纺锤形修剪时，
苹果树上强苹果树高纺锤形修剪时，易出现:下部疏枝过多过重、上部留大枝或留枝角度过小、轻率落头等导致发生上强现象，生产上应注意避免。
https://appimg.guoyetong.com/pic/20230316/1678946202721548_412.jpg
https://appimg.guoyetong.com/pic/20230316/1678946202723727_505.jpg
https://appimg.guoyetong.com/pic/20230316/1678946202725470_940.jpg
https://appimg.guoyetong.com/pic/20230316/1678946202726837_807.jpg
https://appimg.guoyetong.com/pic/20230316/1678946202728710_878.jpg
老师讲的有道理。
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