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果树缺铁时,因叶绿素不能形成而造成“缺绿症”,开始时,幼叶叶脉间失绿黄化,叶脉保持绿色,以后完全失绿。因铁在体内移动性小,所以缺铁症状首先表现在幼叶,每年春天,随果树的萌芽,抽梢,长枝,需要从土壤中吸收足够的铁,以维持新叶的生长,而将铁肥直接施入土壤。效果不理想,为此可采用以下方法:
Fruit tree iron deficiency, due to chlorophyll can not be formed and cause “lack of green disease”, at the beginning, the young leaves between the veins lost green yellow, veins to maintain green, completely lost the green after. Because of the small mobility of iron in the body, so the first symptoms of iron deficiency in young leaves, each spring, with the fruit tree buds, shoots, long branches, the need to absorb enough iron from the soil to maintain the growth of new leaves, and Iron fertilizer directly into the soil. The effect is not satisfactory, for which you can use the following methods: