Symptoms and Control methods of Common element deficiency in Maize

Corn is a common crop and the main economic net income of many peasant households. Corn, like human beings and other animals and plants, needs a variety of elements to grow healthily. If there is a lack of certain elements when planting, it will not only affect the growth of corn, but also affect the yield and quality, and reduce economic benefits. The following pro-agricultural network brings common symptoms of element deficiency in corn and its prevention and control methods.

1. Phosphorus deficiency

In the case of phosphorus deficiency, maize grows slowly at seedling stage, and the leaf tip and leaf edge are purplish red, which is the most obvious characteristic. The leaf edge is curled, the leaf color is green or gray-green, and the stem is thin and weak. With the growth of the plant, the purplish red at the leaf tip will gradually disappear, and the lower half of the leaf will turn yellow. some miscellaneous varieties will not appear purplish red at the leaf tip leaf edge at the seedling stage, but the seedlings with phosphorus deficiency will certainly be smaller than the normal seedlings. Phosphorus deficiency will also affect the pollination and grain filling of maize, and there are more shrunken grains of corn after maturity, which affects the yield and quality.

Prevention and control methods: for the soil with low phosphorus content, farm fertilizer or phosphate fertilizer can be applied to increase the phosphorus content and prevent phosphorus deficiency. The lack of phosphorus in maize seedling stage can increase the application of phosphorus fertilizer, but if the long-term reason is bad, the application of phosphorus fertilizer can not be recovered directly, so we can spray foliar fertilizer and topdressing phosphate fertilizer.

2. Nitrogen deficiency

In the growing period of corn, the demand for nitrogen is relatively large, so nitrogen deficiency is also a common phenomenon. When nitrogen is deficient in the seedling stage, the growth is slow, the plant is short, and the leaves are yellowish green. With the passage of time, first, the old leaves of the lower part of the plant begin to yellowing, gradually upward, waiting for the whole leaf to yellowing, while the leaf sheath turns red, and the leaf dies in yellowish brown at last. In the later stage of growth, due to nitrogen deficiency, heading will be delayed and the ear can not grow normally, resulting in a reduction in yield.

Control methods: apply sufficient base fertilizer, fertilize in combination with cultivated land when planting, it is best to choose the mixture of farm fertilizer and chemical fertilizer, topdressing nitrogen fertilizer at seedling stage and heading stage, depending on the growth status of the plant, it is found that when nitrogen deficiency is found, low concentration urea aqueous solution can be sprayed.

3. Potassium deficiency

When the maize is deficient in potassium, the new leaf color is yellow or yellowish green, the planting growth is slow, the stem node is shortened, the stress resistance and disease resistance are weakened, and it is easy to be disturbed by diseases and insect pests. Some of the old leaves begin to yellowing at night, and the leaf margin is scorched, which will develop with the development of the leaf vein, and finally there will be brown stripes around the leaf vein. in addition, when the corn is ripe, the plant is prone to lodging due to potassium deficiency.

Prevention and cure method: potassium deficiency can add potassium sulfate, potassium chloride or potassium compound fertilizer to the base fertilizer before sowing, generally more than ten kilograms per mu, and potassium fertilizer can be applied after potassium deficiency in the later stage.

4. Zinc deficiency

Corn is very easy to identify when it is zinc deficient, which is characterized by white buds, chlorosis of leaves, yellowing of leaf tips and margins, stripes around veins, but yellow and white leaves will dry up and die when they are deficient in zinc for a long time, while the ears are small and bald when heading.

Prevention and control methods: also add an appropriate amount of zinc fertilizer in the base fertilizer, generally apply one or two kg of zinc sulfate per mu, lack of zinc in the later growth, zinc sulfate can be adjusted to low concentration solution with water, and the effect of leaf fertilizer spraying is excellent.

The above are the common symptoms and prevention methods of corn deficiency brought by the pro-agricultural network. I hope it can help you. If you want to know more about corn planting, please pay attention to the pro-agricultural network.