First, determine the sowing date and sowing date, which should be closely linked to the field transplanting time. Seedling raising is too early, seedlings are too old, and the growth after transplanting is not good, which affects the yield; Seedling raising is too late, and the purpose of early season cannot be achieved. Therefore, the suitable sowing date should be determined according to the transplanting time, which is generally 15 ~ 25 days earlier than the direct sowing corn.

Second, increase the number of seedlings In order to evenly raise seedlings, strengthen seedlings and ensure the uniformity of transplanted seedlings, the number of seedlings should be appropriately increased when raising seedlings, which is generally about 65,438+00% higher than the actual seedling requirement.

Third, seedling grading should be thoroughly watered the afternoon before transplanting. When raising seedlings, the seedlings are graded according to their size and strength, and transplanted in blocks or pieces, which is convenient for management. Sow seedlings, bring as much soil as possible when raising seedlings, and less damage to roots. Special attention should be paid not to shake off the residual seeds in the roots, otherwise the survival rate of seedlings will be reduced. When transporting seedlings, don't put them too crowded, try to reduce vibration and prevent loose soil from falling seeds and hurting roots.

Fourth, it is best to transplant in cloudy or rainy days. Transplanting in sunny days, preferably in the evening, is beneficial to survival. When transplanting, shallow planting in deep ditch (pond) should be adopted, which is beneficial to survival and watering and topdressing. After watering the living trees, cover them with fine dry soil to prevent water evaporation, which is beneficial to survival.

Generally, it takes 25 ~ 30 days to raise seedlings and transplant. Transplanting is too early, and the yield-increasing potential is small; Transplanting is too late, forming small old seedlings, leading to empty stalks and sharp drop in yield. Controlling the age of transplanted seedlings is the key to the success or failure of transplanting corn seedlings. If the transplanting area of seedlings is large, varieties with different growth periods can be used, or seedlings can be raised in stages, and the transplanting time can be staggered to avoid small seedlings and old seedlings.

The best transplanting seedling age is two leaves and one heart, and the greenhouse seedling age is usually 7 ~ 10 day. Early-maturing varieties have shorter seedling age and older age, and it is easy to form early flowering "small old seedlings" after transplanting, which reduces the yield. The seedling age of mid-late maturity varieties can be slightly longer.

Verb (abbreviation of verb) Transplanting technology Transplanting can be divided into directional and non-directional strip planting. The directional transplanting of net seeds adopts north-south ditching and east-west orientation. Single seedling nutrition bag, when transplanting, the leaves are placed perpendicular to the row direction, the specification is 150 cm, the water content is 120 cm, the row spacing is 70 cm, the width of the strip planting ditch is 30 ~ 40 cm, and the depth is about 10 cm. After applying base fertilizer, transplant. The plant spacing is about 18 cm, with 5000 ~ 5300 plants per mu.

The transplanting depth should be flush with the height of the nutrition bowl or not expose the white stems. Be sure to thoroughly water the roots when transplanting. Pay attention to watering after transplanting to ensure survival.

6. Pay attention to watering in time to control drought after planting. You can add a little fully decomposed human and animal feces to the water to promote early birth and rapid development. After transplanting, the seedling stage is about 6-7 days. After survival, topdressing should be done in time, and thin and decomposed human and animal manure or nitrogen fertilizer should be used.