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葡萄缺铁黄叶病近年发生较普遍,尤其在早春连续灌水后旺盛生长期更为突出。缺铁症状首先表现在幼嫩部分,初期叶肉变黄,叶脉仍为绿色。随病情发展,黄化程度加重,甚至全叶呈黄白色,严重削弱树势,影响产量和果实品质。 葡萄缺铁黄叶病较难矫治,通常土壤偏碱,在土中的Fe~(2+)变为Fe~(3+)难被根系吸收,特别是在症
Grape is lack of iron yellow leaf disease occurs more commonly in recent years, especially in early spring after the continuous vigorous growth period is more prominent. Iron deficiency symptoms first manifested in the young part of the initial yellow leaves, veins are still green. With the progression of the disease, the degree of yellowing increased, and even the whole leaf was yellow-white, seriously weakening the tree vigor, affecting yield and fruit quality. Grape is difficult to correct iron deficiency leaf disease, usually alkaline soil, Fe ~ (2+) in the soil into Fe ~ (3 +) is difficult to absorb by the root system, especially in the disease