成龄苹果树形改造对根系生长分布的影响Effects of reformation of the apple tree canopy on root distribution
秦玲;魏钦平;李嘉瑞;邹养军;王小伟;
摘要(Abstract)：
以成龄红富士苹果为试材,应用壕沟法研究小冠疏层形改造成高干开心形对根系分布状况的影响。结果表明:垂直分布上,改造树总根数增加,直径小于2mm的吸收根密集分布于20～40cm土层,而对照则分布于0～20cm;改造树和对照树水平分布最高峰分别出现在距树干100～120cm和60～80cm处。改造树根干重显著高于对照,提高了13.4%。可见,小冠疏层形改造为高干开心形后,根数目、干重增加;根系向下延伸,向外扩展。
关键词(KeyWords)： 苹果;树形改造;根系分布
基金项目(Foundation): 北京市科委资助项目(编号:H030730050130)。
作者(Author): 秦玲;魏钦平;李嘉瑞;邹养军;王小伟;
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