What should we pay attention to when growing sweet corn?

What should we pay attention to when growing sweet corn? Please advise sweet corn planting to pay attention to: first, isolation planting: sweet corn and ordinary corn should be planted in isolation to avoid flour. General plain area isolation of more than 400 meters, such as forests, hills, villages, houses and other natural barriers, the distance can be appropriately shortened. If the corn is planted adjacent to the corn with different flowering period, the flowering time should be staggered for more than 15 days. Second, fine sowing: sweet corn has weak ability to germinate and arch soil, so it is necessary to choose plots with good fertility, moderate pH, convenient irrigation and drainage and sufficient soil moisture. To fine ground preparation, shallow sowing and fine sowing, the depth is generally 4 cm. Third, sowing by stages: sweet corn can not be released for a long time after harvest, so planting sweet corn should be sowed by stages according to the market demand and factory processing capacity, and the early, middle and late maturing varieties should be matched to improve economic benefits. Fourth, reasonable close planting: the planting density of sweet corn should be determined according to variety characteristics, soil fertility, sowing time, planting mode and market demand. In the general medium fertility soil, 4000 plants are suitable, the early-maturing varieties can be denser and the late-maturing varieties can be sparse. Fifth, timely detillering: sweet corn generally has strong tillering ability, and the tiller competes with the main stem for nutrients and water, which affects the growth of the main stem and the hair degree of the ear, so the tiller should be broken as soon as possible. Sixth, strengthen management: generally apply 3000-4000 kg of farm manure, 7 kg of pure phosphorus, 5 kg of pure nitrogen as base fertilizer, timely watering of six leaves, and 5 kg of pure nitrogen. Depending on the growth of sweet corn, an appropriate amount of nitrogen fertilizer can be applied again in the big trumpet mouth period. In the irrigated sweet corn field, the irrigation should not be less than 3 or 4 times, which should be carried out before jointing, heading and flowering stage and filling stage. Sweet corn has high sugar content and is vulnerable to corn borer. It can be sprayed with phoxim or methamidophos 1000 times liquid in the early stage, or mixed with 3% carbofuran and fine sandy soil at 1:5 in the big trumpet mouth stage, and each plant is poured into the heart leaves. 7. Timely harvest: the harvest time is mainly based on the appearance of the grain, the days after pollination are calculated, the water content and sugar content are determined, and the taste is used to determine the harvest time. Generally speaking, sweet corn has the highest sugar content and the thinnest skin at 20-25 days after silking, so it is the most suitable for harvest. The optimum storage temperature of sweet corn: 0 ℃ relative humidity: 95-98%RH sweet corn sweetness and interval decreased rapidly after harvest. The higher the storage temperature, the faster the transition, so it is an extremely intolerant crop. As a result, few people make longer-term savings. General storage is only slightly extended for a few days to tie in with production and marketing operations. After sweet corn harvest, the heat in the field should be removed in the shortest time and the product temperature should be reduced, which is the main key to maintain the quality of sweet corn. The faster the cooling, the slower the loss of sweetness and the better the quality of sweet corn. As for the precooling operation, such as crushing ice, water cooling, pressure differential air cooling, etc., can be used, depending on the equipment of the place of origin and calculate the cost. In addition, in the process of storage, transportation and sale, the low temperature must be maintained in order to maintain the good quality of sweet corn. The storage of sweet corn should also pay attention to the maintenance of high humidity. Bract storage can reduce the loss of water and increase the protective effect. If there is a cling film, the effect is better. But must pay attention to ventilation, so as not to produce peculiar smell. If the sweet corn kernels are cut off, the storage life is quite short, which can only be stored for one day at about 0 ℃. Therefore, as a commodity sale, we must pay attention to the daily sales volume, do an appropriate amount of processing, and must always be stored at about 0 ℃ in order to maintain considerable quality. Storage temperature (℃) 0 51015 normal temperature (25 ℃) storage period (days) covered with plastic film within 8-12 5-10 2-50-11 days. Click to get more corn planting techniques click to get more food crop planting techniques