缺氮 植株矮小,生长缓慢。叶子小而少,出叶慢,叶色由淡绿变黄绿,下部叶子枯萎、落叶早。分蘖少或很少分蘖。很系生长衰弱,发育不良。子实小而不饱满,成熟过早,结粒少。 缺磷 出叶迟,落叶早,叶色暗绿,叶缘呈紫红或紫褐色。生长缓慢。分蘖少或不分蘖。禾谷类作物茎秆变赤褐色。根在生育初期伸长不良,根毛粗大。豆科作物的根瘤发育不良。开花迟,花弱、秕 Nitrogen-deficient plants are short and grow slowly. Small and small leaves, the leaves are slow, leaf color from light green to yellowish green, lower leaves withered, early leaves. Less tillers or few tillers. Very weak growth, dysplasia. Small but not full fruit, mature premature, less grain. Phosphorus leaves late, early leaves deciduous, dark green leaves, leaves margin was purple or purple brown. Slow growth. Less tillers or no tillers. The stalks of cereal crops turn brown. Root elongation in poor growth, root hair coarse. Nodular crop nodules dysplasia. Flowering late, weak flower, 秕