General manifestations of plant nutrient deficiency

Orchids are planted in a variety of ways, and many people even use less and less soil, so there are a variety of nutrient deficiency symptoms. The study of nutritional deficiency requires very strict experiments and good instruments and equipment, especially those in trace elements are very expensive, so the research on nutrient deficiency is mainly in crops and forestry, but less in flowers. We can only tell from the general manifestation of lack of nutrients in plants:

Nitrogen deficiency: the leaves are narrow and green fade.

Phosphorus deficiency: small leaves, dark green, lack of luster.

Potassium deficiency: old leaves and leaf margins are yellow, brown spots appear on the leaves. Premature senility.

Calcium deficiency: necrotic growth point, leaf tip curved hook-like, leaf wrinkled, edge curled, plant short.

Magnesium deficiency: chlorosis between veins, reticular veins, a variety of color spots.

Sulfur deficiency: yellowing of new leaves and uniform loss of green.

Iron deficiency: the new leaves are green, and the veins are still green at the initial stage.

Boron deficiency: there are many lateral buds, but the growth is abnormal.

Manganese deficiency: the new leaves are green, the veins and the vicinity are still green, and in severe cases, there are dark brown spots.

Zinc deficiency: chlorosis of new leaves, starting near the midrib. The margin of the leaf is wrinkled.

Copper deficiency: young leaves lose green and yellow, with white leaf spots. Some plants also secrete gelatinous substances due to lack of copper.

Molybdenum deficiency: interveinal leaves become pale and yellowish, prone to spots.

Author: Liu Jingqiu