Maize needs to absorb a variety of nutrients during the growth and development process, not only the large elements of nitrogen, phosphorus and potassium, but also the trace elements such as calcium, magnesium, sulfur, copper, iron, zinc, manganese, boron, and molybdenum. The trace element requirements Although it is small, it is very important for the growth and development of crops. Once it is lacking, the growth and development of corn will be affected, and in severe cases, it will cause a reduction in production.

The role of zinc fertilizer

Zinc is a trace element necessary for the growth and development of corn, and it is also a component of many enzymes in plants. Not only can it significantly promote the growth and development of corn, improve the efficiency of photosynthesis, make plants more robust, enhance disease resistance, but can also prevent baldness and lack of kernels, promote early maturity of corn, delay the senescence of leaves and stalks, and increase ear length and ear length. According to the experiment, the yield per mu can be increased by 8-15%. With the gradual increase in corn yield and the increasing use of macronutrients, zinc deficiency has become a limiting factor in increasing corn yield, which has the effect of small fertilizers.

Zinc deficiency symptoms

Corn is very sensitive to zinc. Once zinc is deficient, symptoms can appear 1 to 2 weeks after emergence. Mild zinc deficiency, small white spots appear on the leaves, and quickly expand to form local white areas, which are translucent “white silk” shapes, and new young leaves are light yellow; when there is moderate zinc deficiency, after the jointing of corn, Yellow and white strips appear on both sides of the ribs of the diseased leaves. In severe cases, they appear as wide and white patches. The diseased leaves are easily torn when exposed to wind. Diseased plants have shortened internodes, dwarfing, and sometimes leaf-occipital dislocation. In severe zinc deficiency, the leaf color will be dim, and some plants will form “empty stalks” or lack seeds in the later stage.

Prevention method

Corn has a small demand for zinc. According to the experiment, according to the yield index of 1600 kg per mu, only 30 grams of zinc per mu can meet the demand for zinc fertilizer. Taking into account the utilization rate and other factors, per mu It only needs 85 grams of zinc sulfate to reach the production target of 1600 kg per mu.

It can be combined with the prevention and control of thrips, Laodelphax striatellus and other pests in the 3~4 leaf stage of corn. Spray 50 grams of zinc sulfate per acre and spray 30 kilograms of water evenly to meet the need for zinc fertilizer at the seedling stage of corn; In the big bell mouth stage, combined with the prevention and control of corn borer, spray 50 grams of zinc sulfate per acre and spray with 30 kilograms of water evenly to meet the needs of zinc fertilizer for corn at the heading and filling stage.

Maize needs to absorb a variety of nutrients during the growth and development process, not only the large elements of nitrogen, phosphorus and potassium, but also the trace elements such as calcium, magnesium, sulfur, copper, iron, zinc, manganese, boron, and molybdenum. The trace element requirements Although it is small, it is very important for the growth and development of crops. Once it is lacking, the growth and development of corn will be affected, and in severe cases, it will cause a reduction in production.

The role of zinc fertilizer

Zinc is a trace element necessary for the growth and development of corn, and it is also a component of many enzymes in plants. Not only can it significantly promote the growth and development of corn, improve the efficiency of photosynthesis, make plants more robust, enhance disease resistance, but can also prevent baldness and lack of kernels, promote early maturity of corn, delay the senescence of leaves and stalks, and increase ear length and ear length. According to the experiment, the yield per mu can be increased by 8-15%. With the gradual increase in corn yield and the increasing use of macronutrients, zinc deficiency has become a limiting factor in increasing corn yield, which has the effect of small fertilizers.

Zinc deficiency symptoms

Corn is very sensitive to zinc. Once zinc is deficient, symptoms can appear 1 to 2 weeks after emergence. Mild zinc deficiency, small white spots appear on the leaves, and quickly expand to form local white areas, which are translucent “white silk” shapes, and new young leaves are light yellow; when there is moderate zinc deficiency, after the jointing of corn, Yellow and white strips appear on both sides of the ribs of the diseased leaves. In severe cases, they appear as wide and white patches. The diseased leaves are easily torn when exposed to wind. Diseased plants have shortened internodes, dwarfing, and sometimes leaf-occipital dislocation. In severe zinc deficiency, the leaf color will be dim, and some plants will form “empty stalks” or lack seeds in the later stage.

Prevention method

Corn has a small demand for zinc. According to the experiment, according to the yield index of 1600 kg per mu, only 30 grams of zinc per mu can meet the demand for zinc fertilizer. Taking into account the utilization rate and other factors, per mu It only needs 85 grams of zinc sulfate to reach the production target of 1600 kg per mu.

It can be combined with the prevention and control of thrips, Laodelphax striatellus and other pests in the 3~4 leaf stage of corn. Spray 50 grams of zinc sulfate per acre and spray 30 kilograms of water evenly to meet the need for zinc fertilizer at the seedling stage of corn; In the big bell mouth stage, combined with the prevention and control of corn borer, spray 50 grams of zinc sulfate per acre and spray with 30 kilograms of water evenly to meet the needs of zinc fertilizer for corn at the heading and filling stage.