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大气污染对植物危害很大。简单、快速地鉴别大气污染对植物的危害,是农业环保工作的重要任务,也是生产上亟待解决的问题。鉴别大气污染对植物的危害,一般可采取以下步骤:一、田间调查.1.观察叶片症状。受二氧化硫危害时,在叶片的叶脉间产生伤斑,伤斑由漂白引起失绿,逐渐呈棕色坏死,仔细观察叶片伤害症状可以区分其它因素造成的危害。虫害症状常有咬嚼的痕迹;病害症状常有孢子囊群、菌丝体、分生孢子等;风害引起的擦伤现象,在单子叶植物上出现伤斑,但在背风处明显消失。
Air pollution is very harmful to plants. The simple and quick identification of the hazards of air pollution to plants is an important task of agricultural environmental protection and also an issue to be solved urgently in production. To identify the hazards of air pollution on plants, generally can take the following steps: First, the field survey .1 Observe the symptoms of leaves. Hazard by sulfur dioxide, the leaf veins in the leaves produce lesions, bleaching spots caused by the loss of green, gradually brown necrosis, careful observation of leaf injury symptoms can distinguish between the hazards caused by other factors. Pest symptoms often have traces of crunching; disease symptoms are often sporangia, mycelium, conidia, etc .; wind damage caused by the phenomenon of abrasion in the monocotyledons, but obviously disappeared in the leeward.