Cultivation Techniques Of Corn

- Aug 31, 2018-


     The cultivation history of corn in China has been about 470 years. However, due to high yield, good quality, adaptability, the cultivation area is developing rapidly. At present, China's planting area is about 300 million mu, second only to rice and wheat, ranking third in food crops. Second only to the United States in the world. China has accumulated rich experience in the cultivation of corn. Sowing: The natural conditions in China's corn producing areas vary greatly. According to the local frost period, soil texture, soil fertility, and planting month, the suitable varieties are selected, and the yield of forage maize and dentate hybrids is high. Also pay attention to the breeding of good varieties, and properly arrange the area of the seed field. The sowing period of corn is affected by temperature and humidity. The spring sowing corn is stable at 15 ° C in the upper layer of 7.6 cm for the best sowing period. Summer-sown corn in North China is planted in time after harvesting of wheat or peas. The depth of sowing is 2.5--10cm depending on the soil moisture, and 5-6cm is most suitable. The seeding rate per mu is 3 to 4 kg, 4000 to 6000 per mu. How to grow corn forage. Unicast, from planting to harvesting, facilitates mechanical operation. Intercropping with soybeans, socks, beans, peas, and medlar can increase protein yield per unit area. Management: Corn plants are tall, with high yields of grain and stems and leaves, requiring fine management. Fertilization, irrigation, chemical weeding and pest control are the key technical measures in high-yield cultivation and management of corn. To obtain high-yield and high-quality corn, 2000-3000kg of high-quality manure per acre is used as the base fertilizer. When planting, apply 4-5kg/mu of sulfuric acid, 15-20kg/mu of superphosphate, and 2~3kg/mu of chlorinated tree as seed fertilizer to apply nitrogen fertilizer during jointing, booting, tasseling and flowering filling. Nitrogen application rate of 10-20kg/mu during the whole growth period. N:P:K is 1:0.5 to 0.8:0.8. Corn has a semi-arid climate but is very sensitive to water. During the flowering period, one corn consumes about 2kg of water per day, consumes 3-4m3 of water per acre per day, and consumes 250-350m3 of water during the whole growth period. Different fertility corns have different water needs. 10 days before the tasseling and 10 days after the tasseling are the most demanding periods of water in the corn, which is called the “critical period of water demand”. This period is to be irrigated. Corn is usually watered 3-4 times in a lifetime, depending on the region and the specific situation. The irrigation method is mostly for furrow irrigation and flood irrigation in China. Recently, sprinkler irrigation, drip irrigation and the latter two methods have been developed to save water and evenly irrigate. Corn is not tolerant. In areas with high groundwater levels and large rainfall in the south, it is necessary to pay attention to drainage or adopt ridge cultivation and Hetian cultivation methods to prevent mites. Corn often occurs in leaf spot, head smut, smut, black streaked dwarf disease, bacterial wilt and other diseases and insect pests such as armyworm, corn borer, cockroach, tiger, and cockroach. It is necessary to select and control disease-resistant varieties, strengthen cultivation management, rational rotation and chemical control to prevent pests and diseases.