一、酸性土小麦黄化死苗病发生原因及症状土壤偏酸引起的有效钼缺乏是诱发小麦黄化死苗病的主要原因。该病的主要症状是:麦苗普遍叶色变淡,呈黄绿色或淡绿色,叶片上出现细小失绿斑点,叶尖干枯、卷曲,黄化乃至死苗,因而缺窝缺苗多;苗期直至收获时,植株明显矮化;叶片窄小,茎叶数少;分蘖迟而少;经济性状变劣,亩 First, the acid soil wheat yellow dead seedlings causes and symptoms of soil acidosis caused by the effective molybdenum deficiency is induced wheat yellow dead seedlings disease is the main reason. The main symptoms of the disease are: wheat leaf generally fades leaf color, yellow green or light green, green leaves appear small spots, leaf tip dry, curly, yellow and dead seedlings, and therefore lack of more than lack of seedling seedling; seedling Until harvest, plants dwarf; leaves narrow, fewer stems and leaves; late tiller less; economic performance worse, mu