When sowing late autumn sowing corn, the temperature above 35 °C, the vegetative growth period is short, it is very unfavorable to the growth of the seedling stage, it is not easy to form large seedlings and strong seedlings; the high temperature at the booting stage also has some influence on grain differentiation, and the flowering period and grain filling The early weather is more favorable; if sowing is too late, if corn is heading and spit around September 20, it will be vulnerable to low temperature or cold dew. If the temperature is lower than 20°C, fertilization will be obstructed and bald granules will be aggravated. Therefore, the sowing of autumn corn should be particularly stressful and suitable to prevent it from being too late. It is generally advisable to plant it before and after July 25th. The late-maturing late-maturing hybrids should be at the end of July, and the early-middle-maturing hybrids should be before the beginning of autumn. If the sowing is too late, the grain will not be full due to the lower temperature during the later period of the grouting. Drought-resistant maize is a crop with large water requirement. Autumn corn is susceptible to autumn drought in the growing season, especially in jointing booting stage and heading and flowering stage of maize. Water consumption is relatively sensitive, and drought is easily occurred at this time. It will affect the development of male and female ears. Severe ones will cause tassels not to be extracted, or the time interval between male and female ears will be prolonged. Normal pollination will not be possible, which will greatly affect the yield. Therefore, if there are irrigation conditions, if the water holding capacity after seeding is lower than 60%, the seedlings will be easily burned and need to be moistened by watering; the leaves of the seedlings will be curled in the late stage to maintain the seedlings for drought; the water holding capacity will be maintained at about 70% during the jointing and booting stage. Soil surface exposed fields need irrigation and drought. Anti-seizure is rare Because of the high temperature and the shortening of sunshine during the early stage of the growth of autumn corn, the reproductive growth of corn will be earlier and the period of vegetative growth will be shortened. Therefore should increase the density, it is best to plant a wide and narrow rows, a wide row of 46 cm, a narrow row of 33 cm, a spacing of 22 cm, 5000-500 per acre density, generally more than 500 to 800 per acre of spring corn. Anti-fertilization late autumn corn field high temperature, rapid growth and development, topdressing should be applied early to master Miaofei early, ear fat Meng, the principle of quick-acting fertilizer-based. Generally 500 kilograms of corn per mu, a total of 12.5 to 15 kilograms of pure nitrogen is needed. The ratio of base fertilizer, seedling fertilizer, and panicle fertilizer is preferably 2:1:2. Fertilizer can be traced twice in the jointing period and in the big bellmouth. Shi: When the fertilizer is low, it can concentrate on top-dressing joint fertilizers at one time, which promotes the development of young panicles. On the basis of applying base fertilizer, 4 to 5 phases of top-dressing joint-fertilizer, 5 kg of urea per mu, 5 kg of potassium fertilizer, 8~9 During the leaf stage, the panicle fertilizer is topdressed, and 45% compound fertilizer 20 kg per mu is used, which is combined with irrigation irrigation channel or hole application. In order to concentrate the supply of nutrients, at the beginning of the tasseling process, one-third of the total male flower of Tochigi was removed to concentrate the nutrients and promote grain filling. Pest Control Pests of autumn corn are mainly corn borers and aphids, and they are used to control corn borer. At the end of the heart and leaves of corn, 150 ml of BT emulsion is used per mu, 1 kg of water is mixed, 15 kg of fine sandy soil is mixed, and formulated into granules. Within the heart, each plant applied 3 to 4 grams. The male corn borer larvae were found to be harmed by picking and spinning. After 3 o'clock on a sunny day, 80% dichlorvos emulsion was used 800 times per acre and 75 kg per acre were sprayed on the top of the corn ear and on the top and bottom leaves of the two leaves. The control of aphids can use 10% osmium net 2500~3000 times liquid. Hair Rejuvenation Laser Helmet,Hair repair device,Anti-hair Loss Laser Hair Growth Cap,Laser Medical Hair Loss Laser Cap Shenzhen Guangyang Zhongkang Technology Co., Ltd. , https://www.szlighttherapymachine.com