1.缺氮 生长受阻,叶片小且色淡,叶片稀疏易落,影响光合作用。因而生长不良,植株较小,分枝少结果小而少。 2.缺磷 生长受到抑制,植株矮小,叶片变成深绿色,灰暗色无光泽,具有紫色斑,最后枯死脱落。 3.缺钾 叶片出现棕色斑点,发生不正常的皱纹,叶缘卷曲,最后焦枯,呈似火烧过状态。 4.缺钙 根系生长受到抑制,根系多而短,细胞壁粘 1. Nitrogen deficiency blocked growth, leaves small and pale, thin and easy to fall leaves, affecting photosynthesis. Thus poor growth, smaller plants, fewer branches and less results. 2. Phosphorus lack of growth inhibition, short plants, the leaves become dark green, gray dull, with purple spots, and finally died off. 3. Potassium deficiency leaves appear brown spots, abnormal wrinkles occurred, leaves curl, and finally coke, was like a fire over the state. 4. Calcium-deficient root growth is inhibited, root more and shorter, cell wall sticky