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你的来信由《山西果树》编辑部转给我要我答复。你说你在果树四周栽上枸桔想作围园用。结果不少植株出现了黄梢子,有的叶片还变白,大有死亡之势。根据你所谈情况分析。我认为是枸桔苗因缺铁引起的黄化病。这是一种因环境条件不良所引起的生理病害。正常植物的叶片之所以呈现出绿色,是因为叶中含有大量的叶绿素,而铁是植物体合成叶绿素时必不可少的“催化剂”,植物如缺铁,叶绿素即无法形成,叶片即失绿而变成黄色,以至白色,严重时枯死;又由于铁在树体内不能从老的组织内向幼嫩组织中转移,所以缺铁后症状首先出现在嫩梢、嫩叶等幼嫩部分。
Your letter from the “Shanxi fruit tree” editorial department to give me a reply. You say that you planted citrus fruit around the fruit tree for fencing. The results of many plants appear yellow tip, and some leaves also white, a great death trend. According to your analysis of the situation. I think it is caused by yellow iron deficiency Miao Miao caused yellow disease. This is a physiological condition caused by poor environmental conditions. The reason why the leaves of normal plants appear green is because the leaves contain a large amount of chlorophyll, while iron is an essential “catalyst” for plants to synthesize chlorophyll. Plants such as iron deficiency can not form chlorophyll and the leaves turn green. Into yellow, as well as white, dead serious; but also because the iron in the tree can not be transferred from the old tissue to the young tissue, so iron deficiency symptoms first appeared in tender shoots, tender leaves and other young parts.