In the Jianghuai watershed area, the development of early spring sweet waxy corn seedlings with double film mulching and transplanting is mainly used for fresh corn production, and the sowing date can be greatly advanced, generally from late February to early March. This paper introduces the double-film cultivation techniques of sweet waxy corn in early spring for reference.

Seedling raising techniques of sweet waxy corn 1. Seedbed seedling raising: A place with loose and fertile soil, high organic matter content and sunny and leeward should be selected as the seedbed. Apply 8- 10 kg of fully decomposed high-quality organic fertilizer, 30-40 g of urea, 150 g of calcium superphosphate, 3 g of zinc sulfate and 30 g of potassium chloride to each square meter of seedbed, and apply the soil layer with a thickness of about 10 cm in combination with soil preparation, and turn it into1.2-65433. Because of the low temperature in early spring, it is necessary to cover with double films.

2. Seedling raising in nutrient pots: nutrient soil, using 30-40% decomposed manure, adding 60-70% fertile and loose fine soil, adding a small amount of phosphate fertilizer, fully mixing, sieving, adding water to moisten, making a cylindrical nutrient pot with a diameter of about 6 cm and a height of 7-8 cm with a pot making machine, moving the nutrient pot to the bottom of the seedbed,

Seedbed management of sweet waxy corn 1. Moisture control: keep the soil of seedbed moist from sowing to emergence. When the emergence rate reaches 90%, remove the first layer of flat film and control watering to make Miao Zhuang prosperous. If the seedlings wilt, water can be added appropriately in the morning or evening. Water once before transplanting.

2. Control the temperature: When the cold current comes, cover the straw mat to keep warm. From the leaves to the heart, the temperature in the bed can be maintained at 20-25℃ during the day. If it exceeds 30℃, some films should be removed to cool down. Uncover the film and practice the seedlings about 5 days before transplanting.

3. Control the growth of root system: raise seedlings in nutrient pots. After emergence, move the nutrient pots once every two leaves grow. If there are gaps between the pots, fill them with fine soil.

Transplanting technology of sweet waxy corn 1, Honda's preparation: to realize the coordinated application of farm manure and chemical fertilizer by applying base fertilizer, generally applying farm manure 1500-2000 kg, calcium superphosphate 30-40 kg, potassium chloride 10 kg, urea 15 kg and zinc sulfate per mu.

2. Transplanting period and density: when transplanting, the temperature is high, the seedling age can be shorter, and the temperature is low, and the seedling age can be longer, but it is not less than 4 leaves short and not more than 7 leaves long. Generally, it should not be controlled at 3500-4000 plants per mu, and wide and narrow rows should be adopted for transplanting. It can be ditched and transplanted, and it can be pushed down and transplanted.

Field management after transplanting The principle of field management is to give priority to popularization, promote quick and slow seedlings, deliver seedlings early and improve the survival rate.

When the soil moisture is insufficient or the weather is dry, it should be watered 1 time 2-3 days after planting. 3-4 days after planting, check the seedlings. Timely intertillage, especially deep tillage, can promote the development of roots, and at the same time, combined with intertillage, root retting can be carried out. On the basis of applying base fertilizer, topdressing can be applied after delaying emergence and before heading. Generally, urea 15-20kg is applied per mu.

Using biological pesticides to control corn borer. It can be irrigated or sprayed with100g bt insecticidal net at the heart leaf stage and the silking stage of corn respectively.