葡萄植株在春季从伤口处向外流水 ,这种现象称伤流。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 ,这时期称伤流期。伤流期的长短 ,因地区、品种而有差异 ,有的仅几天 ,有的可长达 5 0余天。葡萄的伤流是由根压引起的 ,当春季土壤耕作层的地温逐渐上升至 7～ 10℃以 Grape plants flow outward from the wound in spring, a phenomenon known as traumatic injury. The injury of grapes appeared in the spring when the sap began to flow to the sprouting leaf for a period of time, during which time the wound was called. The length of the injury period varies according to region and species. Some are only for a few days, while others can be as long as 50 days. Grape injury is caused by the root pressure, when the soil temperature in spring soil cultivation gradually increased to 7 ~ 10 ℃