Older leaves have ivory-tinted necrotic spots and shreaks coalescing into larger scorched areas; some leaves show pale (faded) yellow chlorosis over whole surface of apical regions.

 
  • 缺钾的大麦叶片:老叶出现灰白色斑点,逐渐连在一起呈烧焦区域,有的叶片黄化一直到叶尖。
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