葡萄是进入结果期最早的树种之一、大部分品种在适宜的生长条件下、当年发出的各次副梢(夏芽和冬芽)都很容易形成花芽而开花结果。因为葡萄的芽具有早熟性、花芽不但形成早,而且形成时间短。据观察葡萄冬芽一般在主梢开花期起即开始形成花芽,随着新梢的生长,花芽自下而上相继形成。夏芽一般在主梢开花以后开始大量形成。在生产实践中充分 Grapes are one of the earliest species to enter the fruiting period. Most of the varieties are under appropriate growth conditions. The shoots (summer buds and winter buds) issued in the same year are easy to form flower buds and flowering. Because buds of grapes are premature, flower buds not only grow early but also form time short. It is observed that grape buds generally begin to form flower buds at the flowering stage of the main shoots. As the shoots grow, flower buds form one after another from bottom to top. Summer buds usually begin to form in large quantities after the main shoots bloom. In full production practice