一、小麦缺素症状的诊断１．缺氮小麦缺氮时,植株生长不良,茎杆矮小,下部叶片狭小而硬,叶片无斑点,叶色黄化,根少,分蘖少。２．缺磷小麦缺磷时,根系发育受抑制,下部叶片暗无光泽,叶片无斑点。严重缺磷时,叶色发紫,光合作用减弱,叶片狭窄,旗叶呈暗红色。３．缺钾小麦缺钾时,植株 First, the diagnosis of wheat deficiency symptoms 1. Nitrogen deficiency of nitrogen, the poor growth of plants, short stalks, the lower part of the narrow and hard leaves, leaves without spots, leaf color yellow, less roots, fewer tillers. 2. Phosphorus deficiency of wheat lack of phosphorus, root development is inhibited, the lower leaves dark dull leaves without spots. Serious lack of phosphorus, purple leaf color, weakened photosynthesis, leaf narrow, the flag leaves were dark red. 3. Potassium deficiency in potassium deficiency plants