The Initial symptoms include interveinal chlorosis on young leaves, which can be similar to those of iron deficiency. In later stages of zinc deficiency, newly emerged leaves will likely to be narrow and remain small. Symptoms that might occur as the severity level increases are shortening of the internodes, necrotic spots, and bronzing of the leaves.
Zinc is an important micronutrient needed in small quantities by all plants. Within the plant, it functions as an activator of enzymes and is involved in the producing the growth hormones. A zinc deficiency can result in poor plant growth and development.
Bổ sung kẽm sunfat (ZnSO4) hoặc kẽm oxit (ZnO) cho đất. Trong đất kiềm (pH cao), dạng kẽm chelate (Zn-EDTA) tốt hơn so với dạng kẽm vô cơ.
Có thể thay thế bằng cách phun kẽm sunfat hoặc chelate.
*Names marked in red are considered to be highly poisonous to beneficial insects.
*Names marked in green are considered to be organic and IPM (integrated pest management) compatible.