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本试验以盆栽和大田栽培的新红星／西府海棠（ＭａｌｕｓＭｉｃｒｏｍａｌｕｓ）为试材，研究了苹果新根的周年发生动态。盆栽１～２年生幼树萌芽后新根发生总量持续增加，只有生长根发生量在６月下旬～８月略有下降。在同样的环境条件下，大田植株的新根发生动态因植株类型而异，双峰和三峰曲线皆有；春季不同类型树体发根差异最大，小年树、弱树发根量在萌芽后缓慢上升，不因春梢的迅速生长而降低，旺长树、大年树在春梢旺长前达到高峰，之后下降形成低谷，丰稳产树此时虽有增长但非常缓慢；春梢停长后各类树体发根均达高峰，并在７～８月份秋梢生长、高温期下降；秋梢停长后出现秋季高峰，但大年超负荷树秋季高峰消失，并影响次年（小年树）春季新根的发生。总之，弱树新根特别是生长根发生量始终最小，旺长树生长根量则显著高于其它树体类型，丰稳产树发生量高而稳定，旺长树受新梢生长、大小年树受果实发育影响显著
In this study, potted and field cultivation of new red star / West House Begonia (MalusMicromalus) as the test material to study the annual apple new root dynamics. The total amount of new roots in pots 1-2 years old after germination continued to increase, only the amount of root growth decreased slightly from late June to August. Under the same environmental conditions, the dynamic changes of new roots in field plants varied according to plant types, and the bimodal and trimodal curves were all the same. The differences were found in the hair roots of different types of trees in spring, Slow rise, not because of the rapid growth of spring shoots to reduce, Wang Chang tree, tree in the spring before the peak long before reaching the peak, down to form the trough, abundance of trees at this time despite the growth but very slow; spring shoot long stop After all kinds of tree hair roots reached their peak, and in July and August autumn shoot growth, high temperature decline; autumn shoots peak appeared after the fall peak, but the annual peak of the overload tree disappears, and the next year (small Year tree) The emergence of new roots in spring. In short, the new roots of weak trees, especially the growth of root growth is always the smallest, Wang Chang-tree growth is significantly higher than the other tree types, abundance and stability of trees yield high and stable, Wang Chang-tree growth by the shoots, the size of the tree Affected by fruit development significantly