葡萄植株伤口为何流胶？如何防止？葡萄植株春季受伤后，会从伤口处向外流水，这种现象叫“伤流”。葡萄的伤流出现在春天树液开始流动至萌芽展叶的一段时间里，这一时期称为“伤流期”。伤流期的长短因地区不同而有差异，有的１０天左右，有的长达５０天左右。葡萄伤流的... Why grape plant wound gel? How to prevent? Grape plants spring injury, it will flow out from the wound, this phenomenon is called “bleeding.” Grapes injury occurs in the spring when the sap flow began to sprout leaves for a period of time, this period is called “injury period.” The duration of the injury period varies from region to region, some about 10 days, and some up to 50 days. Grape injury ...