The latest corn defertigation symptoms and control methods

The scientific name deficiency of maize is due to the fact that corn grows in the middle and later stage, because the nutrients in the soil can only meet the needs from seedling to heading stage, and it is considered that the base fertilizer and topdressing are absorbed by corn, and begin to show the symptom of de-fertilization after entering the filling stage. So what should we do about corn fattening? Let's get to know it with the editor.

1. Symptoms of losing fat

Many farmers believe that corn de-fertilization is mainly due to the lack of three major elements of nitrogen, phosphorus and potassium, and mainly occurs in the early stage, but in the actual production, the fertilizer needed in the early stage of seedlings is very little, and there is generally no phenomenon of de-fertilization in the early stage of crops. If corn lacks three elements of nitrogen, phosphorus and potassium, the leaves must be examined. When nitrogen is deficient, the first leaf below is usually obvious, yellowing neatly from the leaf tip to the petiole, and the symptoms of phosphorus deficiency and nitrogen deficiency are the same at the base. the difference is that the yellow leaf edge appears light purple. Potassium deficiency leaves generally appear in the upper leaves of nitrogen deficiency and phosphorus deficiency, where the leaves are yellow, the veins are green on both sides, and the leaf tip is scorched, which is an obvious reaction of potassium deficiency.

2. Element deficiency

Element deficiency is the lack of trace elements in corn, magnesium deficiency and zinc deficiency are first shown on the old leaves, magnesium deficiency will cause yellow stripes on the old leaves of corn, and develop to the tip of the leaves, the edges and tips of the leaves are light purple, and wither and die; there is a white broad band on both sides of the old leaves of zinc deficiency, the young leaves are yellowish white, and wither and die in the later stage. The symptoms of copper, sulfur, iron, boron and other elements are mainly manifested in the upper leaves, the top heart leaves turn yellow and the growth is blocked when copper is deficient; when the corn is deficient in sulfur, the upper new leaves yellowing and the leaves become thinner; when the iron is deficient, the upper young leaves lose green and yellow stripes; when boron is deficient, the upper leaves turn yellow and have yellow-green stripes.

3. Prevention and control methods

First of all, we should try our best to increase the application amount of farm manure to ensure that the nutrient elements are sufficient and complete, so as to improve the level of soil fertility; the second is to carry out shallow ploughing of 15-20 cm and deep ploughing of 30-45 cm to expand the turned-over area; the third is to increase the use of micro-fertilizer due to the use of various nutrient elements; the fourth is to increase the use of compound fertilizer and bacterial fertilizer to increase the vitality of beneficial bacteria.

The above is the introduction of corn desalination symptoms and prevention and treatment methods, hope to help you, want to know more related knowledge, please follow us.