Nongye Yun: "Left one è··, right one è··, one mu of land, one thousand two seedlings." It is corn, the original high-yield corn stalk corn is not planted now, and now the corn varieties are numerous, one There are only one or two sticks on the straw, and most of them are only one stick.
Different varieties have their own suitable density. The stalks of large-earth cultivars are generally between 3,000 and 3,500 plants/mu, and the large and medium-sized cultivars are about 3,700 plants/mu. The compact varieties are generally about 4,000 plants/mu.
Too much tiller at such a density, also known as the long scorpion, means the competition for light, water, and nutrient resources. Should the corn scorpion should be smashed? Similar to this phenomenon, a corn is more Should a few sticks be smashed? And should the top tassels in the corn field be smashed?
1. Should corn scorpions should be embarrassed?
Should not!
In the spring, the corn is split, and the roots are forked. There are too many branches, which is commonly known as the long scorpion. It should not be smashed. There are quite a few controversies!
Corn tiller
Causes of corn scorpion
In fact, the biggest reason for removing the seeds and weather and rain is that there are too many nutrients, that is, nitrogen fertilizer (urea) is used. Now everyone is topdressing, and urea can be used in the topdressing period. The urea effect is still fast.
But corn can't talk, unlike you drinking, you drink too much, you know how to spit it out, you are comfortable after the spit, but the corn doesn't have a long mouth, you can only eat corn when you feed it, eat more Can't spit it out.
What to do? Corn also has a trick, that is, a second child, that is, a scorpion, put the excess nutrients into the scorpion first, so that the excess nutrients are diverted.
The benefits of scorpion
1. Increase the leaf area of ​​the whole corn.
Studies have shown that the experimental corn varieties that are not tillered have a leaf area of ​​35,610 to 46,510 square meters per hectare, while the leaf area per hectare of the tiller is only 24,690 square meters. The former is much larger than the latter, which produces more for corn. More dry matter has laid a good foundation.
2. Increased root coefficient.
The results of the root system showed that the average number of stubble per plant was 56, while that of the sorghum was 29, with an average increase of 27.6, which was an increase of 95%.
3. Reduce the evaporation of soil moisture.
The soil moisture content of the soil at 10 cm above the surface of the earthworm was 14.49% higher. The formation of a larger leaf canopy after the retention of the soil reduced the evaporation of soil moisture and played a role in maintaining soil moisture.
It can be seen that in this case, the transpiration of the leaves is more effective than the evaporation of the surface, so the stubble can maintain soil moisture and resist drought.
4, remove the top advantage.
The main stems of corn with many scorpions are short and fat, and the more scorpions, the less likely the main stems are. Plant stupidity is the hallmark of high yield!
5. Reflow of reproductive elements.
The scorpion will gradually wither and die after the corn is plucked, and the water, photosynthetic products and reproductive elements will return to the main stem, and finally provide nutrients for the ripening of the corn.
Hazelnuts increase the overall leaf area of ​​corn
Reduce evaporation of soil moisture
The bad side of the scorpion
Eliminating the scorpion is a kind of damage to the plant. In the process of self-repair of the plant, the probability of invasion of the pest and fungus and fungal infection will increase.
What is the use of corn scorpions?
Tell everyone, don't worry, the biggest role of this second child (scorpion) is to retain nutrients for the main stem. When the main stem nutrient is not enough, the scorpion will return the nutrients to the main stem, and the scorpion will wither, so You are not blind, you are throwing away nutrients.
Some people have said that some of them don’t, and they will pick up in the fall.
This is indeed the case. People are also unselfish and selfish. There are also corn scorpions. Some scorpions say, I will give you nutrients by sputum. I want to make a corn cob, just don’t give it. The scorpion will bear a small corn on the cob in the fall, but there is basically no grain in it, it is empty.
And this situation is very rare, so there is basically no impact on your corn main stem. So if your corn is long, you don’t have to worry about it, let him kill himself.
2. Should the knotted knot be smashed?
should!
When you planted corn, have you ever discovered that some of the plots of corn are not tall, but one plant has 3-4 small sticks in the same ear position. What is the reason?
Corn is a great phenomenon
Reasons for corn knotting sticks
Lei Jiajun, a professor at Shenyang Agricultural University, said that this kind of corn is related to water and fertilizer, but it has little to do with it.
Shi Zhensheng, a professor at the Institute of Special Corn at Shenyang Agricultural University, said that although corn is generally tied to two sticks, this multi-bar corn is also normal.
There are some special corn varieties that have many great features. In addition, it is also related to the environment. If nutrition and light are very sufficient, the number of knots will increase. But in these corn cobs, only about two or three of the above bars can grow.
Professor Shi introduced that the corn seeds that are generally sold on the market are mostly hybrid varieties, and it is difficult to grow a lot of corn. Some traditional farmers have preserved seeds of special varieties.
“Each feature is controlled by multiple genes. Through long-term continuous selection, genes with this characteristic can be accumulated and purified, and corn varieties with many characteristics such as sticks, sticks, high poles and dwarfs can be cultivated. The corn cobs from this corn can grow in the right environment."
It is understood that in addition to the differences in the characteristics of the variety and the temperature and temperature of water and fertilizer, it is also possible that the plant itself has a genetic mutation.
After the corn returned to its ancestors, the number of knots increased greatly.
Shouldn't the extra sticks be embarrassed?
Most of the hybrid corn 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, but it needs to consume a large amount of nutrients, and remove the no-effect ear nutrients to supply the main ear. Increasing the main ear of the ear can not only increase the grain weight, improve the quality of the corn, but also promote early maturity.
3. Should the top tassel should be embarrassed?
should!
In the corn planting, there are also doubts about whether or not corn should go to the males. In the corn planting, some farmers will give the corn to the males, but why should the corn go to the males? What are the methods for the corn to go to the males?
Corn interlaced
Is corn going to be male?
Corn emasculation refers to the removal of the top tassel after the corn has grown to a certain period of time.
The emasculation of corn can transfer the nutrients and water consumed by tassels to the growth and development of the ear, which can increase the growth of the ear, increase the number of grains and grain weight, and reduce the baldness. The emasculation can improve the light conditions of the group, and the corn mites and mites are serious. In areas where the removal of tassels can reduce pests.
Corn male flower spike
The benefits of corn emasculation
1. The mechanism for increasing production is clear.
After emasculation, the effective nutrients absorbed and manufactured by the plant can be continuously delivered to the grain, thereby reducing the tassel's large amount of nutrients due to respiration, reducing the flowering, increasing the grain weight and increasing the yield.
2. The plant becomes shorter, which is beneficial to increase the density.
After the male is removed, the height of the male corn is reduced by 25-30 cm, which improves the ventilation and light transmission conditions in the field, which is conducive to increasing the planting density and increasing the yield.
3. The flowering period meets well and the seed setting rate increases.
After emasculation, due to improved plant ecological conditions and nutrient transport direction, it was 2-3 days earlier than the unearthed male ears, and the flowering period met well, and the pollination was sufficient to effectively overcome the flower. At the same time, reduce the empty rod rate by 3-5% and mature for 3-5 days.
4. Reduce the damage of mites.
Corn borer often gathers in the big bell mouth to feed, first eats the tassel, reduces the amount of pollen production, followed by spawning, and other parts of the residue after hatching. After emasculation, the pests can be removed together and brought out of the field for treatment, thereby reducing the probability of transfer.
5, less work, low cost.
It is easy to go to the male, and can be operated by men, women and children. Generally, it is 2-3 times for males, and only about 1 work per acre.
Corn tortoise
How do you go to the corn, what are the skills?
It is advisable to go to the male to take the lead and not to loosen the powder. It is easy to damage the top and bottom leaves too early, and the powder has been loosened too late to reduce the emasculation effect.
Going to Xiongyi should be carried out at 10-15 pm on sunny days to facilitate wound healing and avoid bacterial infection. Rainy weather is not suitable for the male. The male can be separated or separated, and the weaker and stronger, the male should not exceed one third of the total number of plants. Two rows of mountains, slopes or windward sides should not go to the male.
1, interlaced to go to the male.
For the tassels that are exposed, remove one line every two lines, but you can't go to the side, you can't bring leaves, otherwise it will affect the pollination and absorption of nutrients and reduce the yield.
When the whole field of female fringe (pistil) is turned from green to red, it is completely emasculated to achieve ventilation and light transmission, increase yield and early maturity, and generally needs to be carried out 2-3 times. This method is time-consuming and labor-intensive, and it is not suitable for farmers who have a small number of people to promote and apply it, so as to prevent an increase in labor, which is not worth the loss.
2, the whole field once went to the male.
When the whole field of the ear filaments turns from green to red or deep red, the manpower should be organized and completely removed in the same time, and the leaves should not be taken to improve the field permeability conditions, promote early maturity and increase yield.
However, the problem is that time is difficult to master, and poor application is not good for pollination and affects production. The advantage is that it saves labor and time, is easy to operate, and is very suitable for people and small farmers.
3. Eliminate pests and reduce insect sources.
Regardless of the method of emasculation, the tassels must be taken out of the field in time to reduce the source of corn borer in the field (the tassel is the main hazard and spawning place of corn mash), and centralized treatment.
4. Eliminate ideological concerns and be timely and competent.
According to the test, a normal development of corn tassels, effective pollen grains can reach 30-50 million, can meet the pollen volume of 5-8 acres with a yield of more than 1000 kg, do not have to worry about insufficient pollen.
5, interlaced to go to the male.
It must be removed when the tassels are exposed to the eucalyptus leaves. It is usually completed in 2-3 times, and the last time it is completely removed. Once the whole field is emaciated, it must be mastered when the whole field of the female filaments (pistil) turns red or deep red. In this way, we can achieve early maturity and increase production.
6. Conditional farmers can also use artificial supplementary pollination methods, and the effect is better.
That is, during the period of heading and flowering, when a large amount of pollen is scattered from 8:00 to 1000, the intertwined pusher shakes and increases the pollination ability among different plants, and the yield increase is remarkable for 2-3 consecutive days.
Adopt measures to increase pollination. It is difficult to extract the pistil of individual varieties (or plants). Use scissors to cut the top (rod) end 2-3 cm in the afternoon. The next day, the filaments can be extracted and pollen increased.
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