First, use fine varieties. Such as: Qifeng 58, Xingkang 2, Hao Shan 31. Second, seed processing. Shaizhong promotes ripening and improves seed vigor. Chemical seed dressing uses 1605 or 100% solution of methamidophos, boring for 2 to 3 hours, and air-drying sowing; dressing with micro-fertilizer, boron, zinc, molybdenum per kg 2 to 4 grams. Third, sowing. Summer maize should be sowed when the early sowing, finishing broadcast before June 25, depending on the size of the grain, generally about 5 pounds, sowing depth of 4 to 6 cm. Fourth, seedling management. 1, check fill seedlings: to ensure that seedlings full, Miao Qi, Miao Zhuang. 2, and time Dingmiao: 3 leaves during the seedlings, 4 to 5 leaf stage Dingmiao. 3, rational close planting. The early maturity dwarf varieties include about 5000 cultivars of Muliumiao, about 4,000 middle-maturing varieties, and 3500-4000 late-maturing varieties. 4. Strengthen water and fertilizer management to promote early-onset seedlings. Summer maize has a short seedling period, rapid development, field management is often lost, and seedlings should be managed as soon as possible. V. Spike management: 1. Top dressing. After the beginning of the jointing of corn, 8 to 10 kilograms (urea) should be pursued in time, and the large bell-mouth should be followed by 15 to 20 kilograms of urea. 2, watering. Summer maize jointing drought in time to water, and promote the normal growth and development of summer corn; big bell mouth watering ear attack in time, the maximum demand for water this period, we must ensure that the appropriate water and fertilizer supply, improve root water absorption capacity, increase leaf photosynthesis, promote A large number of secondary roots occur, which promote the normal growth and development of the male and female ears and ensure that there are many large spikes. 3, the case of timely drainage. At the later stage of corn growth, the activity of the root system is gradually weakened, and the occurrence of corn will seriously affect the growth of corn. Therefore, it is necessary to drain water and prevent flooding in time. Six, flowering should do a good job of artificial pollination. Generally it can increase production by 8-10%. Seven, to Xiong. Detasseling is a simple and easy-to-produce measure of production increase, which generally increases production by about 10%. During the appropriate period of emasculating medulla, it is appropriate to grasp that the tassel has just been pulled out of the parietal lobe but not loose powder. In addition to the top of the ground, the field should be singly segregated. Eight, appropriate harvest. When more than 90% of the plants in the corn field turned yellow and loose, the grains became hard and the nail file was harvested without dents.
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