当地温达到7—9℃时,葡萄树液开始流动,在根压的作用下,水分与养分沿木质部导管上升,早春葡萄枝蔓上造成的伤口一时难以风干,这些液体就从伤口流出,即谓“伤流”。伤流过多时对葡萄的生长影响很大,因为每公升树液中含干物质1—2克,而一个葡萄枝蔓的新剪口,一昼夜可流出630毫升树液呢!因此,应尽量避免在春季剪枝或造成新的伤口。 Local temperature reached 7-9 ℃, the grape sap began to flow under the role of root pressure, moisture and nutrients along the xylem risers, early spring grapes on the wound caused by temporary sticky, the liquid from the wound out of the so-called “Injury.” The injury to the grapes can have a significant impact on the growth of the grapes because of the 1-2 grams of dry matter per liter of sap liquid and a new crop of vine stems that dispenses 630 ml of sap through the night and day! Therefore, Pruning in the spring or creating new wounds.