1. Miao Miao and Miao Miao
What does the seedling mean? In the vernacular, it is said that the extra seedlings are removed, and the seedlings are the places where the seedlings are not seeded. When the corn seedlings are in the first stage, we must first see the seedlings. Is there a phenomenon of lack of seedlings and ridges? In a particularly dense place, it is usually carried out in 2-3 leaves. If it is found that there is a dense area, it is timely to remove the seedlings that are not so good, leaving a seedling with a strong seedling. The purpose is very simple, avoiding the appearance of growth. Grab the fat, grab the nutrients, and grab the water, while also avoiding a series of effects caused by the lack of air in the later period.
For replanting, there are two methods commonly used. For those areas where the emergence is not good, one is to re-seek in time, and the water and fertilizer management in the middle and late stages is basically not affected; the other is to move the seedlings from the seedlings. Planted in the place where the seedlings are lacking, the growth is the same. It is recommended to transplant the soil with soil, and it will be carried out after 4-5 pm to avoid the sun shining, the water evaporation too fast, and the formation of weak seedlings.
2, cultivating
In the corn seedling stage, proper cultivating in the field and loosening the surface layer of the soil is conducive to the normal breathing of the corn roots and ensure the normal growth of the seedling stage. For example, in the summer when the corn is planted, many places are in arid state. Some friends choose to plant water after sowing, and after the corn is emerged, if the field is still very dry, it will continue to be watered, and the field after the watering is easy to heat in the summer sun. Symptoms of the formation of knots, cracks in the plot, in this case, will affect the growth of corn roots, and after cultivating, it will solve this problem well, not only can maintain part of the sensation, but also help the roots of normal breathing It ensures the growth of corn seedlings and also prevents some weeds.
3, weeding
Although the cultivating can remove some weeds, if there are too many weeds in the field, it is necessary to fight drugs. For example, common weeds include crabgrass, foxtail, goosegrass, valerian, alfalfa, leeks, ramie, Weeds such as Solanum nigrum L., perennial weeds include reeds, fragrant aconite, etc. Common weeds can be treated with nicosulfuron, mesotrione, and atrazine, and perennial weeds and scented aconite It is more difficult to do. It is recommended to control the weeds just after emergence, or use the above agents to inhibit the growth and not affect the corn.
There are several precautions for the herbicide after corn seedlings, such as the time of spraying, choose to go after 5 pm before 9:00 am, the best time to fight drugs is 2-4 leaves of corn, and also suggest that the water should be enough, in the guarantee unit Under the premise that the amount of medicine in the area is sufficient, the more water, the better.
4, top dressing
For the time being, the big trumpet period is also considered to be the seedling stage, because the best suitable period for corn topdressing is the large trumpet period, which is generally based on urea, and may also add some phosphate and potassium fertilizers. Foliar fertilizer), urea, the amount of application should not be too much, 10-15 kg per mu, to provide sufficient nutrients for corn growth.
When topdressing, it is recommended to apply ridges, do not spread, avoid unnecessary waste, when topdressing, fertilizer distance and seedlings should not be too close, generally go to the case, 8-10cm.
5. Pest control
Whether it is underground pests (蛴螬, Golden Needle, Earth Tiger, cockroach, etc.) or ground pests (Puma, Laodelphax, Armyworm, etc.), it will harm corn in the seedling stage; and in terms of disease, seedling blight, Rough disease, stem-based rot, etc. will also occur in the seedling stage. Therefore, the prevention and control of pests and diseases must also be in place to ensure that the corn is not harmed.
The specific control agent is simple. The underground pests can be irrigated with phoxim or chlorpyrifos, the thrips and the gray planthopper can be used with imidacloprid, and the armyworm can be used with the salt of the carbaryl. If the disease is caused, the carbendazim can prevent the seedlings, and the imidacloprid + bacteriophage + Potassium dihydrogen phosphate can prevent rough disease, and mancozeb can prevent stem rot. Of course, there are many prevention and control agents. The above is just one of them. Specifically, it can be used in local agricultural materials. Shop to buy.
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