果树营养生长和产量的化学控制可能导致使利用砧木控制果树大小的办法遭到淘汰,它将导致利用组织培养繁殖植株,并在高密度的果园里用自根系生长。当树体形成合适的结果树冠和经过整形充分地占满行间时,这时用抑制GA的化学物质处理树体。许多植物往往着生了超过其光合作用所必需的叶片,由于一、两片叶子的遮盖可以显著地降低下面的叶片的光合作用(Heiinck,1980)。在果树 Chemical control of vegetative growth and yield in fruit trees could lead to the elimination of the use of rootstocks to control the size of fruit trees, which will lead to the use of tissue culture to multiply plants and self-root growth in high-density orchards. When the tree forms a suitable crown of results and is fully filled with plastic, the tree is now treated with GA-inhibiting chemicals. Many plants tend to produce leaves that are beyond their photosynthesis requirements, as the covering of one or two leaves can significantly reduce the photosynthesis of the underlying leaves (Heiinck, 1980). In the fruit tree