不同根域空间对寒富苹果幼树生长发育影响的研究

Study on Growth and Development of Young Trees of Hanfu Apple in Different Root-zone Space

通过对寒富苹果幼树限根栽培,研究了根系及枝条生长发育对不同根域空间处理的响应。结果表明,根系总量随根域空间减小而减少,而细根比例及根系密度增加;根域空间越小新梢停长越早,盆栽植株新梢只有1次生长高峰,而槽栽植株新梢有2次生长高峰;随着根域空间减小,干周、枝条数量、长枝比例减小,树冠受到明显的抑制,但短枝比例、成花枝比例、花芽数均增加。根域限制改变了寒富苹果幼树树体建造过程,使之有利于向生殖发育方向转变。

Responses of growth and development of roots and branches to different root- zone space were studied through root restricting treatment by using young trees of Hanfu apple as materials. The results indicated that： the total quantity of root decreased with the reduction of root- zone space, while the fine root percentage and the density increased. The smaller root- zone space was, the earlier the growth of shoot stopped, and there was only one growing peak for potted plants while two peaks for tank plants. With the reduction of root - zone space, the girth, numbers of branches and proportion of long branches of trees decreased, which inhibited the crown obviously while the proportion of short branches, the ratio of flowering branches and numbers of flower buds all increased. In general, restricting root - zone space changed the growth progress of young trees of Hanfu apple and conducive to the change of vegetative growth to reproduction development.