Seed Quality This year, many new species in the region are in short supply, so there are some 2 or even 3 years of seeds sold on the market. Some peasant friends, in order to save some money, bought seeds of old age cheaply, or were seeds of some irregular manufacturers, resulting in low germination rate and affecting emergence.
After the sowing of soil agglomerate seeds, heavy rain continued for several days, causing the soil to become agglomerated, forming the “hard cover†as the saying goes. This made it difficult for maize seeds to be arched out. Even arches came out with yellow seedlings and weak seedlings.
Temperature The minimum temperature of corn seed germination is 6°C～7°C, and then the germination is better as the temperature rises gradually. If the temperature is low after sowing, the emergence will certainly be affected. However, this year's summer corn does not exist in this area.
Excessive humidity in the rain leads to excessive soil moisture and the seeds suffocate due to long-term flooding, eventually leading to poor corn emergence.
Seeding too deep or too shallow to sow deeply. Seeds are boring because of lack of oxygen. Even if they grow, they grow thin and are not easy to survive. Sowing too light, encountering drought, high temperature, and windy weather, affecting the seed's absorption of water, can also lead to poor root growth, affecting germination and the formation of weak seedlings.
Excessive seed coating dosage of seed coating causes poor emergence.
When the fertilizer is sowed, the distance between the seed and the fertilizer is too short. After the sowing, the seed is exposed to the rain, so that when the seed is germinated, it is eroded by the volatilized fertilizer, resulting in poor seedling emergence.
After the herbicide hits the closed herbicide, too much rain will cause the newly germinated seeds to suffer phytotoxicity. In addition, if the herbicide ingredient used in the seeding of soybeans contains Bactrian, it will also cause phytotoxicity to the corn under the crop.
There is no coating or no secondary coating when the underground pests are sown, which causes the seeds to be destroyed by underground pests such as golden beetles, tigers, and earthworms, affecting seedling emergence.
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