Why is the yield of corn in 20 1 1 Guizhou low?

20 1 1 Guizhou experienced high temperature in August, which lasted for a long time, resulting in low corn yield.

In August, this period is the flowering period of corn. In recent years, the highest temperature in some main corn producing areas has reached 39℃, and severe drought often occurs during the high temperature period. There is no watering condition in many areas, which undoubtedly has a great influence on the pollination and growth of corn. The male and female ears are stunted, the tip is bald and the grain is lacking in the later stage, which reduces the 1000-grain weight and quality of corn.

Method for preventing or alleviating high-temperature weather in corn planting process

First, choose high-temperature resistant varieties.

Many farmers will pursue high-yield varieties when choosing varieties. There is no rainstorm and high temperature weather in the whole growing period of maize, which is easy to produce high yield. However, high temperature weather often occurs in planting areas, so it is best to choose high temperature resistant varieties, which are less affected by high temperature.

Second, broadcast early in time.

After the previous crop is harvested, it is necessary to grab the moisture and sow the corn, so that the light and heat can be fully utilized, the growth conditions of summer corn are suitable, and the flowering period should avoid high temperature time to reduce the impact on corn pollination.

Third, chemical control.

Chemical control during the growth period of maize can promote the growth of maize, improve the stress resistance of maize and alleviate the influence of high temperature on the growth and development of maize. We can start with seed dressing and foliar spraying.

Farmers often use fungicides or pesticides when sowing. In order to improve the stress resistance of maize, brassinolide can also be added during seed dressing to lay the foundation for high yield. However, the amount of brassinolide should not be too large, which is easy to rot seeds. Generally, 0.0 1% brassinolide 5g and corn seed15kg are commonly used.