世界果树栽培的趋势是矮化密植。这种新的栽培方式的主要问题是如何控制枝条旺长和密挤,这是果农所关切的事情。一些农艺措施如开张枝条角度和其它夏剪措施能降低旺盛的垂直生长和增加短枝,但费工较多,而且一般来说只限于幼树的整形。现在,人们试图用化学药剂控制树冠。到目前为止,已经试验过抑芽丹、矮壮素和比久等 The trend of world fruit cultivation is dwarf and close planting. The main problem with this new cultivation method is how to control the growth of branches and the crowding, which is a concern for the growers. Some agronomic measures, such as opening branches and other summer cuttings, can reduce vigorous vertical growth and increase short shoots, but more labor is required and, generally speaking, confined to saplings. Now, people try to control the canopy with chemicals. So far, has been tested inhibition bud Dan, CCC and more so