葡萄新梢的叶腋间有两种芽,即夏芽和冬芽。由于芽体具有早熟的特性,所以当年形成的夏芽和冬芽均可在一定条件下萌发抽枝,成花,形成二次果和三次果。在我国无霜期长的南部或北方保护地栽培条件下,采用早熟或中熟葡萄品种,就可以诱发出品质和一次果相同的二次果、少数可诱发出具有一定质量的三次果。 There are two types of shoots in the leaves of axillary buds, namely summer buds and winter buds. Buds with early maturity characteristics, so the formation of summer buds and winter buds can germinate shoots under certain conditions, into flowers, the formation of secondary fruit and three fruit. In our country frost-free period of the southern or northern protected areas of cultivation conditions, the use of early or medium-ripe grape varieties, you can induce the same quality and fruit once the second fruit, a few can induce a certain quality of the third fruit.