葡萄树新梢黄化现象在葡萄生产中非常多见,很多果农朋友见到黄化就认为是缺铁,盲目补铁肥,大多不能解决问题。导致葡萄新梢黄化的因素很多,要区别对待。1发芽时黄化葡萄树体在发芽时就黄化这种情况多是由于上年营养储备不足造成。葡萄从发芽到开花65%的营养来自于上年贮藏的营养,一旦上年营养贮藏不足,发芽后生长缓慢,叶片发生黄化。1.1造成发芽时黄化的原因(1)上年产量过高。产 Voting phenomenon of grape shoots is very common in grape production. Many friends of fruit growers think yellowing is iron deficiency and blindly supplementing iron fertilizer, most of them can not solve the problem. Lead to yellow shoot many factors, to be treated differently. 1 germination yellow grapevine tree yellow when germinated This situation is mostly due to insufficient nutritional reserves last year. Grape from germination to flowering 65% of nutrients from the previous year’s nutrition, once the lack of nutrition storage last year, germination slow growth, the occurrence of yellow leaves. 1.1 Cause yellowing when germination reasons (1) the previous year’s production is too high. Production