How to grow sweet corn with high yield?

How to grow sweet corn with high yield? Are there any good ways? Hope to know the netizens to help introduce the farming network to sort out the main points of planting sweet corn, listed below for netizens' reference. First, select the improved varieties of sweet corn: the improved varieties of high yield, high quality and multi-resistance can be selected according to the local natural conditions. For those processed into canned products, ordinary sweet corn varieties are selected; for those harvesting fresh ears, super sweet corn varieties are selected. Pay attention to the collocation of early, middle and late maturing varieties and put them on the market in batches to improve economic benefits. The sweet corn varieties suitable for planting in Tongshan area are Miyu 4, Tianyu 2, Huaitian 6, Jingtian 8 and so on. Second, isolation from other maize varieties: there are two methods: spatial isolation and time isolation. The former requires a distance of more than 400 meters between the sweet corn field and the corn fields of other varieties, while the latter requires a staggered sowing time to stagger the heading and flowering stage of two maize varieties, generally requiring an interval of more than 40 days for spring sowing and more than 20 days for summer sowing. Third, sowing at the right time: it is suitable to sow sweet corn when the air temperature is stable through 13 ℃ and the underground ground temperature is above 11 ℃. Generally sowing around April 20, plastic film mulching cultivation can be sowed 5-10 days earlier to be on the market earlier. Summer sowing as early as possible, in order to make full use of temperature and light resources. On the basis of fine soil preparation, seeds with high germination rate are selected and sown shallowly, and the sowing depth should not exceed 4 cm. Sandy land is deeper than clayey land, 3500-3800 plants per mu. Apply special fertilizer for large grain corn with 3-4 grains per hole and 4-8 kg per mu. Fertilization and watering: conditional sweet corn can apply 2000 kg of organic fertilizer, 17-18 kg of pure nitrogen, 4-5 kg of phosphorus pentoxide and 5-7 kg of potassium oxide per mu. Organic fertilizer and phosphorus and potassium fertilizer are all used as base fertilizer, 60% of nitrogen fertilizer is used as base fertilizer, and 40% is used as topdressing. Jointing fertilizer and panicle fertilizer were mainly applied to sweet corn, the former was applied at 7-8 leaf stage, and the latter was applied 10 days before heading. When the relative water content of the soil is 60%, it is beneficial to the growth and development of sweet corn, keep the soil moist before emergence, promote germination, and the soil is not dry and watered at the seedling stage. Sweet corn needs the most water before and after heading and flowering, so pay attention to watering. Improve the ditch system, so that drought can be irrigated and waterlogged can be drained, and when waterlogging occurs, it can be drained and waterlogged in time. Point 5, field management: because the tillering of sweet corn is better, the excess tillers should be removed and damage to the main stem should be avoided during operation. The plants were ploughed and weeded for 3-4 times before closing ridges, and the principle of "shallow, deep and shallow" was mastered in the middle tillage depth, shallow and middle tillage in seedling stage, soil cultivation in middle growth stage, and shallow and middle tillage in late growth stage. Sixth, the harvest of sweet corn: the harvest time can be determined by watching the changes of filaments, pinching tender seeds by hand, tasting sweetness and so on. Generally, the harvest time is harvested with leaves 22-30 days after ear silking, and goes on the market with harvest. If the harvest is too early, the grain content is low, the sugar content is low, and the flavor is poor; if the harvest is too late, the pericarp becomes thicker and the flavor is poor. The method of preventing and controlling the armyworm in the video of planting fruit corn