Corn is empty, not seeded, bald, half-faced, and various symptoms affect corn yield. I don't know if these problems occur in your cornfield. If it does, do you know why? Why should you prevent it? Let's take a look at it.
First, how is corn kernel formed?
Male flower
Corn has female flowers and male flowers, and male flowers are like broom-like ears that grow on the top of corn plants. The female flower is in the middle of the corn, and the mature female flower will stick out a lot of whiskers like whiskers, each of which must be formed in the future to form a corn.
female flower
When pollination is when the pollen of the male flower falls on the "beard", if there is no pollen before the "beard" to the pollination, then the corn will be lacking in the future, and the granule is due to poor pollination or pollination too late.
Second, what are the forms of corn not seeding?
Empty stalk granules are a common phenomenon in corn production, and the level of empty stalk rate directly affects the level of corn yield. There is also corn abundance and lack of grain. The phenomenon of grain loss is mainly manifested in three forms in Daejeon:
1. The side is not real, that is, there is no grain on the side of the ear from the base to the top, and the panicle type is multi-directional and the grain side is curved;
2. There are few kernels in the whole ear, which are scattered on the ears;
3. The base of the ear is not true, that is, the lower part of the ear is not strong. The bald tip, that is, the top of the ear is small, white or yellowish white, and the severe bald tip can account for more than half of the whole ear.
3. What is the reason why corn does not seed?
1, planted too dense
Excessive planting density leads to shading of the leaves and ventilating in the field, which makes the corn grow poorly, causing empty stalks, lack of lines, lack of grain, baldness, and half-face. It is prone to lodging and heavy diseases in case of windy and rainy weather. .
2, sporadic or linear planting
Corn is a monoecious, cross-flowered crop with male flowers on top and female flowers on the bottom. Sporadic or linear planting will reduce the chance of pollination of female flowers.
3, water imbalance
From the big bell to the flowering stage, it is the critical period of corn water demand. In this period, lack of water and drought will cause the tassel to pull out slowly or the tassels that have been withdrawn will die dry, resulting in greatly reduced pollen and male and female. Drought and no rain before and after tasseling, resulting in tassel flowering and earing stage of the earing or postponement, the ear and tassel flowering period is not met.
4. When the flower is scattered, it will encounter high temperature and rainy weather.
The high temperature causes the soil to evaporate in large amounts, which will cause the crop to suffer from drought. Moreover, high temperature is also easy to reduce the activity of corn pollen. When the flowering period meets the high temperature above 35 °C, the pollen and filaments will dry up, and the filaments will be difficult to extract, which often causes poor pollination and firmness to form "stars" or "horns". "Sui, the output is reduced. Rainy weather often causes the ears to not bloom normally, and some pollen expands and ruptures or sticks into a group and loses vitality, which affects the normal conduct of pollination and fertilization.
5, pest damage
The corn flower grain stage is endangered by corn borer, aphid, armyworm and leaf spot, black powder disease and other pests, leading to premature senescence of functional leaves, which will also increase corn empty mites and severely form empty ears.
6, the cause of the seed
If there is a large area of ​​corn that does not bear ears, it is often a problem of seeds. It belongs to the congenital infertile type of empty stalk, and many people call it "public corn." The reason is that the intrinsic physiological mechanism of the seed is declining, which is rare.
7. Pesticide physiology
When the insecticide is sprayed, the amount of the drug is increased, and when the male is used, the use of highly toxic pesticides may occur in this phenomenon, resulting in infertility of the corn. Fourth, how to prevent corn from seeding? At present, some areas are about to enter the summer maize heading flowering period. This period is a critical period of management. The management will create good environmental conditions for the pollination of corn, which can greatly increase the output. Generally, the following management measures can be taken, which will have a multiplier effect.
1. Irrigation drainage
The heading and flowering period of corn is the period of most water demand during the whole growth period. At this time, the leaf area is the largest, the transpiration and photosynthesis are strong, the water demand is large, and it is sensitive to water. If water shortage occurs during this period, the water production will be reduced. The fields should be watered in time. If there is more rain in the maturity stage of corn, it is necessary to do a good job of clearing the ditch to protect the plant from yellowing, premature aging or disease growth, hinder the grouting and firmness, the grain is not full, the baldness is increased, and the yield is reduced.
2, soil fertilization
Cultivating soil can eliminate soil compaction, promote ventilation and warming, promote microbial activity, accelerate nutrient decomposition, promote root respiration and absorption, inhibit weeds and pests, enhance ventilation and light transmission, improve and regulate field microclimate, prevent premature aging Conducive to early maturity.
3, remove the tassel
Corn intercropping is a simple and easy measure. When the corn tassels have just been exposed to the top leaves, they are not scattered, and one row or one plant is pulled off one line or one tassel to concentrate the nutrients. Give the ear, avoid the consumption of nutrients in the tassel, increase the grain weight, and generally increase the yield by 6%-10%.
4, remove the no effect spike
Most of the hybrid maize varieties are single ear varieties. Except for the upper ears of the plants, the second and third ear developments are late, the silk is late, and it can not be fertilized and sturdy. It is a no-effect ear and needs to consume a large amount of nutrients and can be removed. In this way, nutrient concentration can be saved to supply the main ear, and the main ear can be increased, which not only increases the grain weight and the quality of the corn, but also promotes early maturity. (Agricultural World)
The website of this article: The reason and prevention method of the half-face of the bald tip of the corn empty rod
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