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花木在栽培中,如缺乏某些营养元素,会出现生理障碍。应学会诊断,以便及时采取措施。缺氮:植株生长缓慢,叶变小,色发黄,枝细而短,严重时叶片脱落。缺磷:整株叶片呈暗绿色,有时出现紫斑或灰斑。如是花果类,则果小而少,且延迟成熟。缺钾:双子叶植物叶片初略缺绿,后出现分散的深色坏死斑;单子叶植物,叶片顶端和边缘细胞先坏死,以后渐扩大,茎软易断。缺钙:明显地抑制芽的发育,并引起根尖坏死,
In the cultivation of flowers and trees, such as the lack of certain nutrients, there will be physical disorders. Should learn to diagnose, in order to take timely measures. Nitrogen deficiency: Plant growth is slow, leaves smaller, yellow hair, thin and short branches, when the leaves fall off. Phosphorus deficiency: the whole plant was dark green, sometimes purple or gray spots. If the flower category, the fruit is small and less, and delayed maturity. Potassium deficiency: dicotyledon leaves early lack of green, scattered after dark necrotic spots appear; monocotyledonous plants, the top of the leaves and the edge of the cell necrosis, later gradually expanded, soft stems easily broken. Calcium deficiency: significantly inhibited the development of buds and caused apical necrosis,