Fresh corn is mainly sweet corn and waxy corn (sticky corn). Sweet corn is generally sweet (about 10% sugar), super-sweet (20% to 24% sugar) and sweet (more than 24% sugar), white, yellow, dark grain, can also be cooked Canned food and quick-freezing preservation. Waxy corn has high viscosity and palatability. The main characteristics are as follows: First, all endosperm is composed of amylopectin (normal corn is straight-chain), soft and crispy, sweet, sticky, and fragrant when cooked; Slag, nutritious, long harvest time, suitable for fresh food. The second is higher viscosity than ordinary corn and lower fusel oil content. Third, the crude protein, crude fat, oleic acid, and lysine content were all higher than those of normal corn, and the digestibility was more than 20% higher than that of normal corn. The output value of fresh corn for planting is about 1,500 yuan, but the technology is very strong. Generally, the following eight key technologies should be noted.
First, choose a good variety of varieties with strong adaptability, uniform ears, good quality and distinctive characteristics.
1. Sweet corn should choose sweet jade No. 6, Fengtian No. 5, super sweet 102, color sweet 16 and other varieties.
2. Waxy corn (viscous corn) choose Zhongwan No.1, No.1, Thai red peony (also purple citron), black glutinous corn (Taihe 8) and other varieties.
Second, do a good job in seed processing to buy seed when you want to buy coated seeds, prevention and control of underground pests or seedling disease, to prevent the lack of seedlings in the field, spikes, affecting production. If it is not a coated seed and a severe smut plot, use 15% triadimefon for 0.3% to 0.5% of the seeds, and use seed dressings such as Gao Qiao and Phoxim to control alfalfa, etc. Pests.
Third, isolation planting or contiguous planting must be contiguous with the species, do a good job isolation and other corn varieties, prevent mixing, affect the quality and appearance of the ear. One is to isolate it with other crops. When planting special corn, there must be 100 to 200 meters of other crop isolation belt around it to prevent the pollen of other corn varieties from being introduced into the field to ensure product purity. The second is time isolation. When planting corn of different varieties and characteristics in the same plot, time isolation may be adopted. The sowing time of the same variety in the general growth period is 10 to 20 days apart, and early maturing varieties may also be sowed, late mature varieties may be sowed, and flowering stages may be avoided. The third is the facility avoidance period. Special corn is covered with plastic film or sowed before sowing and transplanting to avoid flowering.
Fourth, timely sowing in order to prevent the morning market, to prevent centralized listing, staggering the peak market, according to the market adjustment sowing date, the sooner the better the summer sowing, you can take the floppy seedling transplanting, mulching, or a combination of the two.
Fifth, the rational dense planting corn harvest target is the ear, the density of the size of the ear directly affect the size, uniformity and harvest quality, from the production experience in recent years, generally 3500 ~ 4000 per mu is appropriate.
Sixth, to strengthen the fertilizer and water management, we must first apply the base fertilizer, applying 2 to 3 cubic meters of organic fertilizer at the end of each acre, sprinkle the rich compound fertilizer 60 to 80 kilograms, zinc sulfate 2 to 5 kilograms; secondly reapply jointing fertilizer (heavy 3 light 4), that is, when the corn grows up to the 3-leaf stage, topdressing urea 20-25 kilograms; Third, in the big horn, heading, flowering and filling the drought and watering period.
Seven, timely prevention and control of diseases and pests Fresh corn Because of good quality, pests, such as armyworm, aphids, borers, etc., should be promptly controlled or caught after discovery. Among them, the armyworm must have 10 insects per 100 plants before and after wheat harvest, 40 plants at the 4-leaf stage, 40 insects at the 4-leaf stage, and the control of corn borers when the leaf stage rate reaches 10% at the leaf stage; 100 plant species at the seedling stage Control 15,000 heads of insects. At the same time pay attention to the prevention and treatment of size patches, smut. Once smut occurs, the diseased leaves or diseased plants should be promptly removed and brought out of the field to prevent infection.
VIII. Fresh corn harvested in a timely manner should be harvested and sold or snap-frozen 20 to 25 days after pollination. If the harvest is too late and too early, it will affect the quality and product phase.
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