I. Planting methods
1. Select excellent varieties: reasonably mix early, middle and late-maturing varieties according to different uses, and provide raw materials at wrong times. At present, the better hybrids are Tiandan 9, Tiandan 10, Tian Zi 8 and Chaotian 1.
2. Scientific precision sowing: seed treatment, isolated sowing, precision sowing, sowing by stages and reasonable close planting.
3. Strengthen the management of fertilizer and water: Because the growth period of sweet corn is short, sufficient fertilizer can promote the strong seedling and early development of sweet corn, adjust it neatly, prevent the premature aging of sweet corn, and improve the quality, yield and commodity rate. Attention should be paid to flood prevention in seedling stage and drought prevention in middle and late stage. From sowing date to seedling stage, the relative water content of soil should be controlled at 60%~70%.
4. Artificial pollination: Artificial pollination can improve the commodity of sweet corn seeds. Tap the tassels of corn along the rows with tools such as bamboo sticks, so that the pollen is scattered towards the center, or shake off the pollen in a wide-mouth container covered with paper, and then give it to unpollinated filaments.
5, suitable for harvesting: first look at the changes in filaments, pinch the tender seeds with your fingers and taste the sweetness. The second is to determine the water content of tender seeds. Strengthen the harvest of sweet corn 30 days after 18 ~ silking. Early harvest, low grain content, light color, low yield and low sugar content; When the harvest is late, the peel will thicken, and the sugar in the grain will be converted into starch, which will reduce the sweetness and the flavor, thus losing the unique flavor of sweet corn.
Second, management methods.
1. Check seedlings, replenish seedlings, and harvest seedlings: after emergence, check seedlings in time to fill gaps. A live field, generally 2 ~ 4 leaves per seedling, 2 plants per hole, 4 ~ 5 leaves per hole, 4 seedlings, the seedlings are weak in Miao Zhuang. Pure principles.
2. ridging, weeding and stubble removal: usually, first ridging, then fertilizing and then ridging. Sweet corn branch. In order to ensure the large panicle, only the upper part of the plant is usually reserved, and the redundant panicles in the middle and lower parts are removed to ensure the centralized supply of nutrients, realize the large panicle and improve the commodity rate.
3. Appropriate topdressing and increasing application of potassium fertilizer: Generally, chemical fertilizer and aggressive fertilizer are applied 8 ~ 10cm away from the plant base, and then covered with soil. Appropriate application of strong fertilizer: at the ear stage, strong gluten fertilizer can be applied to the seedling growth, with 2-3 kg urea per mu, or 60-80 kg 1.5% urea and 0.2% potassium dihydrogen phosphate.
4. Keep the soil moist to prevent drought and flood: After sowing, keep the soil moist. If it is too dry, pour some water or water to ensure safety. After combination, especially before flowering, it is most sensitive to water before and after flowering. After the rainy day, the ditches should be drained in time, and flood control measures should be taken to loosen the soil appropriately to improve soil permeability.
5. Timely control of pests and diseases: control of underground pests such as tigers and cockroaches: 50g of 80% trichlorfon, a little water or porridge before and after seedling stage, mixed with 1kg peanuts or rice bran to make poison bait. When the weather is warm at night, it is placed underground or scattered on the ground as a pest to trap.
Brief introduction of sweet corn
Sweet corn is a kind of corn, also known as vegetable corn, Gramineae and maize. Sweet corn is one of the main vegetables in developed countries such as Europe, America, South Korea and Japan. Because of its rich nutrition, sweet, fresh, crisp and tender characteristics, it is favored by consumers at all levels.