What are the common medium and trace element fertilizers? We know that there are 16 kinds of chemical elements required for the normal growth of crops. Otherwise, a series of complications will occur during the growth of crops. This article focuses on the trace elements that need attention during the growth of crops. Trace element fertilizer refers to calcium, magnesium and sulfur fertilizers. These elements are less than normal nitrogen and phosphorus in the normal absorption of crops, but they are higher than other elements and are called trace elements.
At present, calcium fertilizer, magnesium fertilizer and sulfur fertilizer are more common in the market. Some of these fertilizers are in high demand, and in the case of insufficient soil supply, external supply is required. For example, calcium fertilizer commonly used varieties are lime, gypsum, calcium phosphate, calcium perphosphate, calcium magnesium phosphate and other calcium-containing substances. The soil can supply plant calcium and regulate the acidity of the soil.
Sulfur is an important component of sulfur-containing proteins in plants. Sulfur can also promote the formation of nodules in legumes and increase nitrogen-fixing capacity. Some sulfur fertilizers also have the effect of improving soil properties, reducing the content of exchangeable sodium in soil and reducing sodium ions. It plays an important role in soil properties and crop hazards. The main varieties of sulfur fertilizer are calcium phosphate, ammonium sulfate, magnesium sulfate and potassium sulfate.
Magnesium is one of the main components of chlorophyll in plants. When the crop is deficient in magnesium, the leaves usually lose green. The inter-pulse color from the tip and leaf edge becomes lighter, from pale green to yellow and then purple, then to the base and center of the leaf. Expanded, but the veins remain green, forming clear mesh veins on the leaves, and the leaves wither and fall off in severe cases. Magnesium fertilizer varieties are calcium magnesium phosphate fertilizer, magnesium sulfate, magnesium oxide, dolomite powder.
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