After the wheat harvest in the main wheat producing areas, summer corn planting enters the peak period. Corn seedling stage is one of the key periods of corn's whole growth period. Miaoyun, Miaoquan and Miaozhuang are the basic guarantees for high yield of corn. Corn is a summer crop that grows rapidly and is difficult to remedy in the event of a lack of seedlings. Therefore, it is necessary to prevent the lack of seedlings and ridges from the sowing period, and the countermeasures are as follows. I hope to help farmers.
The actual amount of seeding is small or the wheat straw is blocked.
Summer sowing corn is basically sown, because the wheat stalks are partially piled up in the field and the land is not flat, causing the seeds not to be planted into the soil, resulting in a small amount of actual seeding. Moreover, if the hole under the leg is clogging by foreign matter such as straw when planting, it is easy to cause ridge breakage. If the wheat straw is not evenly sprayed during harvesting, it should be evenly spread out or cleared out of the field.
Poor seed quality
Corn seeds have more granules and more worms, which are prone to lack of seedlings, ridges and large-scale seedlings. Seeds that are not coated are susceptible to damage by underground pests. Regularly packaged corn seeds are selected, coated, and evenly distributed, which can effectively control underground pests and diseases. It is recommended not to buy seeds that are in bulk and whose quality cannot be guaranteed, and to buy selected and coated seeds.
Insufficient bottom
Insufficient soil moisture is not uniform, which will result in lack of seedlings and ridges or emergence of seedlings sooner or later. When the soil moisture of the cultivated layer reaches 60%~70% of the field water holding capacity, it is suitable for sowing soil moisture. If the soil moisture is insufficient at the time of sowing, watering should be done.
The sowing depth is uncomfortable. The seeding is too deep, the emergence time is long, the nutrient consumption is much, and the seedlings are thin, especially the short varieties of the bud sheath. The seedlings cannot be unearthed, and the circle is often under the surface. The seeding is too shallow, and it is easy to blow dry the topsoil water and lose it. The suitable sowing depth is determined according to soil quality, moisture and grain size, and is generally 5-6 cm. If the soil texture is heavy, the moisture is better, it may be appropriate; if the soil texture is loose, the easy-to-dry sand land may be as deep as possible, but generally does not exceed 10 cm.
Improper fertilization
If the amount of base fertilizer is too much or the fertilizer is too close to the seed, it is easy to appear chemical fertilizer burning or burning seedlings, resulting in lack of seedlings and ridges. Summer sowing corn is planted with seed fertilizer, and it is recommended to apply 60 kg of special compound fertilizer for corn. When adjusting the planter, the distance between the fertilizers should be 8 to 10 cm.
Herbicide phytotoxicity
1. If the application is not carried out according to the instructions, the concentration will be too high, and the excessive dosage will cause phytotoxicity; if the spraying time is not correct or the herbicide harmful to corn is applied to the sorghum, the residual effect will be caused; and the herbicide harmful to the corn will be sprayed on the field. Will form a mist drift.
2, before the rain, the heavy rain will wash away the liquid, which will result in the loss of high ground and low ground, and produce phytotoxicity.
3, the application interval is short, when the same corn field uses two agents, the short interval will also produce phytotoxicity.
4. After spraying the herbicide, the drug is not cleaned in time, and the chain reaction of the drug affects the emergence of the seedling.
5. The used herbicide bottles (bags) are not properly destroyed and thrown into the ditch or pond. If water is used in the ditch or pond, it will cause phytotoxicity.
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