1. Variety selection: Due to low starch content, grain shrinkage, depression, dryness and low grain weight of super-sweet corn seeds, the germination power is low, the top soil strength is poor, and the seedlings are weak. Therefore, it is very important to choose super-sweet corn varieties with high germination rate and strong growth potential, otherwise it will easily lead to lack of seedlings and ridges.
2. Timely sowing, nutrition and seedlings: From late January to early February, it is the best sowing date for greenhouse sweet corn. Take nutrition and raise seedlings. The nutrient soil is selected from 30% to 40% of decomposed farmyard manure, 60% to 70% of the paddy soil that has been burned more than 3 times, plus 1% phosphate fertilizer, mixed and broken, and put into a plastic nutrient bowl with a diameter of 10 cm. The face is 3 cm away from the mouth. When sowing, first pour the bottom water, each seed, covered with moist fine nutrient soil 2 cm, can not be covered too thick, can not be covered with large soil, so that the seeds can not be unearthed, rotten seeds. Cover the mulch film in time, cover the small shed film, and close the greenhouse. After the seedlings are unearthed, the mulch film is removed in time, and the seedlings are repaired.
3. Site preparation: After harvesting, the crops were cleaned in time, and they were deeply ploughed 10 days before transplanting, and the soil was used for hoeing. The 6-meter-wide shed was 5 畦, and the 畦 (包沟) was 1.2 meters wide. Ditching and fertilizing in the middle, applying 2500 kg of decomposed organic fertilizer per mu, 50 kg of compound fertilizer and 25 kg of phosphate fertilizer. The face is 80 cm wide and slightly turtle-shaped.
4. Timely transplanting: 2 to 4 leaves transplanting is most suitable. However, due to the low temperature in early spring, it is postponed to transplant to 3 to 5 leaves as much as possible. More than 5 leaves are easily transplanted. The transplanting is carried out on a sunny day in the morning. First, the holes are punched as required, and the nutrient meal is removed. The soil seedlings are moved into the holes and covered with soil. Pouring a thin human excrement, covering the mulch, using a black film and a common mulch double-layer cover to control the grass damage and improve the ground temperature. Lightly tear the film to put the seedlings, cover the soil on both sides of the membrane, and put the seedling mouth sealed with fine soil, leaving no gaps. Then cover the small arch shed, the greenhouse, and promote the slow seedlings. After 5 days, the slow seedlings will be transferred to normal management.
5. Greenhouse management: 1 temperature management. In the early stage, it is mainly anti-freezing and warming. In case of frost damage, the cold-proof material is covered with cold-proof materials; the lowest temperature is kept above 10 °C, and when the temperature is higher than 36 °C, ventilation is timely. After pollination, the temperature difference between day and night should be increased. When the night temperature is above 12 °C, the shed can be closed and the quality can be improved. 2 water and fertilizer management. In early spring, sweet corn in the greenhouse is generally not required to be watered due to multiple coverage. Although the base fertilizer is applied more adequately, due to the low temperature in early spring, the growth period of super sweet corn is prolonged, in order to improve the commerciality of the grain of the ear, the large bell mouth period is 10-15 kg of urea per acre. 3 special measures. Early-green greenhouse cultivation of super-sweet corn should also be strictly isolated. Different varieties of corn should be separated by more than 300 meters, and the wrong sowing date should be more than 25 days. Due to the lower temperature during the entire growth period. Super sweet corn seedlings are prone to tillering. In the middle and late stages, multi-ear and long-leaf leaves are prone to be too long. It is necessary to remove tillers and ineffective panicle buds in time, leaving only one or two strong ones. If the leaves are too long, they should be timely. Cut off the top temporal lobe. The silking period must assist with artificial pollination to increase the seed setting rate and the commodity rate.
6. Pest control: In the seedling stage, the main control of cockroaches, cockroaches, ground tigers and other underground pests can be controlled by 50% phoxim emulsifiable concentrate 1000 times solution and 48% lesbian emulsifiable concentrate 1000 times. In the later period, the focus is on the control of corn mash, which can be poured into the heart of the big trumpet. The silking period is directed at the flowering of the filament and the ear, for a total of 2 times. Low-toxic, low-residue biological or chemical pesticides must be selected, such as 1.8% avermectin 2500 times solution, 10% removal of 1000 times solution, 5% Regent 1500 times solution.
7. Timely harvesting: Super sweet corn harvests sooner or later, directly affecting its quality and flavor. Generally, 24 to 26 days after pollination, when the filaments are dry and the color is brown, the harvest is best, the taste is sweet and fragrant, and the taste is excellent. .
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