When is it suitable to sow corn? What's the impact of early broadcasting?

There is a great difference in climate between the north and the south of China, and planting is guided by solar terms. Generally, after the solar term in Grain Rain, the ground temperature can be stabilized above 10 degrees before sowing. Spring maize planting areas in Huanghuaihe usually start sowing around Grain Rain. If it is a corn planting area in Northeast China, the sowing time will be delayed. Generally, the best sowing date is around May Day, and the temperature in the south is higher. The best time for sowing is the right time and the right ground temperature. When sowing corn, we should fully consider the local climatic conditions in the hot and rainy season, and whether it overlaps with the pollination period. If it overlaps with the pollination and filling period, it will easily lead to poor pollination, vacant grains and many bald tips, which will have a great impact on maize yield and quality.

The harm of early sowing of corn, no matter what kind of corn variety, early sowing is not good. Because the ground temperature is too low, it is easy to cause corn seeds to rot. The emergence of maize is uneven, and it is easy to form weak seedlings. Corn is more vulnerable to pests and diseases during its growth. Sowing is too early and the ground temperature hasn't risen yet. If the soil moisture content is relatively high, corn seeds will not come out in the soil, which will lead to the phenomenon of seed rot, thus reducing the emergence rate of seeds. In the later stage, it is necessary to replant in the field, which increases the production cost and the seedling growth is inconsistent, thus affecting the uniformity of corn maturity. Because of sowing too early, the nutrients consumed by the normal growth of maize will increase, resulting in malnutrition, which will lead to weak growth potential, decreased resistance and increased pests and diseases after maize emergence, until a series of problems appear in the final yield.

Premature sowing will increase the nutrients consumed by normal germination and growth of maize seeds, resulting in insufficient nutrient supply for seed storage, weak growth potential of maize after emergence, decreased plant resistance, and aggravated pests and diseases, which will lead to a series of problems until the final yield is affected. If the sowing time is too early, the pollination period and filling period of corn just catch up with the high temperature rainy season, which will lead to the shortage and sharp decline of corn seeds and the decline of yield. Only when the daily average temperature is above 10 degrees can corn develop normally. Premature sowing of corn will slow down the germination rate of seeds, and the seedlings will not grow well in the later stage.