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苹果缺氮: 叶片呈淡黄绿色,在收获前一个月就开始落叶。果实着色较好。 PowerPoint PPT Presentation


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正常. 缺N. 苹果缺氮: 叶片呈淡黄绿色,在收获前一个月就开始落叶。果实着色较好。. 小白菜缺氮 : 矮小瘦弱,老叶黄化。. 芹菜缺氮:从左到右同一植株叶片从年幼、中等到衰老呈现不同的黄化病,单独一片叶的黄化均匀。. 一品红缺氮:叶片小 , 均一黄化 . 起初叶脉呈桃红色特别明显 , 但随着氮的进一步缺乏叶脉颜色变浅。. 包心生菜. 直叶生菜. 油菜缺磷: 自左至右,依次为油菜幼叶至老叶,缺磷油菜叶片从暗绿、暗紫发展至紫红色。. 玉米缺磷: 植株矮小,碳水化合物代谢受阻,植物体内易形成花青素,如玉米的茎常出现紫红色症状。. 芜青甘蓝缺磷: 老叶上呈现紫斑.

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苹果缺氮: 叶片呈淡黄绿色,在收获前一个月就开始落叶。果实着色较好。

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