Copper deficiency in maize is less common, but sometimes occurs in soils with high organic matter or strong alkaline. When the corn lacks copper, the top and heart leaves turn yellow, and the growth is hindered. When the maize is lacking, the plants are short and dense, and the chlorosis between the veins has been developed to the base. The tip of the leaf is severely chlorotic or necrotic and the ear is very small.
The reason for this is above all the cause of the soil. Copper deficiency in crops is most likely to occur in peat soils with high organic matter content and high pH soils, and copper availability in these soils tends to be low. Followed by improper fertilization, excessive application of nitrogen fertilizer, often leading to late plant growth leaves dark green color, the group is too lush and prone to lodging, prone to copper deficiency is not true. Followed by the difference in species.
Corrective technology first, increase organic fertilizer. For the copper deficiency disease that occurs in barren acid soils, organic fertilizers should be added to increase the copper supply capacity of the soil. Second, control the amount of nitrogen fertilizer. In soils with weaker copper supply, the amount of nitrogen fertilizer should be strictly controlled to prevent the occurrence of copper deficiency disease caused by excessive nitrogen fertilizer. Third, apply copper fertilizer. When the copper sulphate base is applied, the amount per acre is generally 0.4 kg, and more than 3.0 kg should not be used. In addition, copper sulfate can be formulated into a 0.02%-0.2% solution and evenly sprayed on the blade surface.
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