Sowing time of spring corn in Henan

The suitable sowing time for spring maize in Henan Province is from late April to early May, when the soil temperature at the depth of 5-10cm in the soil surface is about 10 ℃-12 ℃. Proper early sowing of corn can prolong the growth period, make the maturity of corn better, and also increase the yield per mu, but it is not the earlier the better, if sowing early, it is easy to increase the incidence of diseases and insect pests, so it is necessary to reasonably grasp the sowing time.

Sowing time of Spring Maize in Henan Province

It is suitable to sow seeds from late April to early May when the deep soil temperature of 5-10cm is kept at 10 ℃-12 ℃.

II. Matters needing attention in sowing spring corn in Henan

1. It is not appropriate to sow seeds prematurely.

Corn should be sowed early properly, which can prolong the growth period, good maturity and high yield per mu, but it is not the earlier the sowing, the higher the yield. Spring corn sowing too early will be vulnerable to diseases and insect pests, such as rough shrinkage disease, underground pests and so on.

2. The sowing depth should be appropriate.

Whether you choose machine sowing or manual sowing, the sowing depth of corn is required to be 3-5cm. If the soil moisture is good, the sowing depth is 3cm. If the sowing is too deep, it will lead to slow emergence, weak seedlings and too much watering, which will lead to low emergence rate of corn.

3. Pay attention to rational fertilization

The basic fertilizer of spring sowing corn mainly applies farm manure and topdressing mainly applies nitrogen fertilizer. In the whole growing period of spring corn, nitrogen fertilizer is needed twice, while in small trumpet stage and big trumpet stage, 30 jin of urea per mu can be applied respectively.

4. Pour the masked water in time

If the soil moisture is poor, the head water should be irrigated immediately after sowing, but the watering should be appropriate, and there can be no water storage on the ground after watering. If flooded, it is easy to cause stagnant water in the field, resulting in slow emergence, yellow seedlings, and serious lack of seedlings.

5. The sowing amount should be the same.

After the seed is put into the seeder, the plucking wheel should be turned to see whether the amount of seed in each row is the same, and then sowing when it is the same, which is beneficial to the consistency of seedling emergence after sowing.

6. Control red spiders

Red spider disease often occurs in spring sowing corn, if the winter temperature is relatively high, it will lead to red spider overwintering reproduction, prevention and control of red spider is mainly based on prevention, during the period can be used avermectin plus paraben, in the seedling stage leaves grow to about 6, or just began to spray control, and then big trumpet mouth period spray again, so that can effectively prevent the harm of red spider.

7. Prevention and treatment of rough shrinkage disease

To control maize rough dwarf disease, 2.5% efficient cyanogen chloride 50ml plus 10% imidacloprid 20g pesticide spray per mu can be sprayed every 5-7 days, 2-3 times continuously, and field edge and field weeds can be sprayed at the same time.