How to grow sweet corn
I. Isolation planting
Sweet corn should be grown in isolation from normal corn or other types of corn to avoid stringing. Space isolation and time isolation can be used, but space isolation is better. If space isolation is used, the plain area is generally more than 400m. If there are natural barriers such as forests, hills, houses, roads, etc., the isolation distance can be appropriately shortened. If time isolation is used, the seeding period should be more than 30 days apart. In short, the principle of not meeting the two types of maize pollen.
Second, fine soil preparation, Shi Shifei, shallow broadcast broadcast
As the content of starch in sweet corn kernels is small, the ability to germinate and bury soil is weak. Therefore, when planting, choose a plot with loose soil, good fertility, good sensation, and convenient irrigation and drainage. Conditional areas, can be prepared per acre of high-quality decomposed manure 1000 ~ 1500kg, plus 15kg superphosphate mixed thoroughly cooked, applied before sowing. Sowing should be fine, 3 to 4 grains per hole, sowing depth slightly shallower than ordinary corn, generally about 4cm soil cover.
Third, the stage sowing
Planting sweet corn is to sell fresh tassels in the market or supply processed canned food at the factory, which is totally different from growing ordinary corn. At the same time, sweet corn cannot be harvested for a long time after harvest. Therefore, planting sweet corn depends on the market demand and plant processing capacity, sowing in stages, and early, middle and late maturing varieties to increase economic efficiency.
Fourth, reasonable dense planting
Planting density depends on the characteristics of the variety, soil fertility, sowing date sooner or later, planting methods, while paying attention to the commercial performance of the ear. In general medium fertility soil, it is appropriate to use 4,000 plants/mu. Early maturing varieties can be denser and late-maturing varieties can be thinner.
V. Strengthening field management
1. Seedlings fill seedlings, seedlings Dingmiao
After emergence, seedlings should be checked in time; when the seedlings have 3 to 4 leaf time seedlings, 4 to 5 leaves when the seedlings. The principle of seedling seedlings is to remove large, small, and middle leaves to ensure uniform seedlings.
2. Pay attention to top dressing and timely cultivation
Generally, about 1000kg of organic fertilizer or soil miscellaneous fertilizer is applied to the top of mu, 30kg of urea is used (the topdressing period is 7.5kg at the seedling stage, jointing stage, 15kg of big bell-mouth period), potassium chloride is 5~7kg, potassium fertilizer and organic fertilizer or soil miscellaneous fertilizer One-time topdressing at the seedling stage. The top dressing is applied as deep as possible, and the soil is covered immediately after application. After each top dressing, we should cultivate and weed, pay attention to flat, crushed and loose, and not hurt seedlings.
3. In case of drought
Areas with irrigation conditions should be timely watered at the seedling stage, big bellmouth stage, and filling stage.
4. Control pests
For subterranean pests, 0.5 kg of phoxim and 25-30 kg of fine sand may be applied per acre at the seedling stage. Carbofuran particles may be applied to the corn borer at the leaf stage or the end of the leaf stage.
Six, timely
Timely emasculation is a key cultivation technique for ensuring high yield and quality of sweet corn. However, timely detasseling is the key to technological success. If the detasseler is too early, the parietal lobe is easily brought out. If the detasseler is too late and the nutrient is consumed too much, the meaning of detasseling will be lost. Harvesting of bamboo shoots should be carried out when the tassel exceeds the parietal lobe without bulking. Harvesting of tender ears of sweet corn should be carried out 2 to 3 days after tassel loosening.
Seven, timely harvest
The harvest period of sweet corn has a great influence on the quality and nutritional quality of its products. Premature harvest, less grain content; late harvest, the peel hardens, more slag, losing the unique flavor of sweet corn. In general, the appropriate harvest period is 20~23 days after the pollination of the ear is appropriate; if the purpose of processing canned food can be early harvest for 1 to 2 days, the sale of fresh panicles can be received for 1 to 2 days.
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