First, according to local conditions, select good varieties. Second, strengthen scientific management of water and fertilizer. Before and after corn tasseling, the water requirement is the largest, which is the most sensitive period for water, and the soil moisture content is required to be 70% to 80%. If water is lacking, it should be timely watered and preserved to ensure the balanced development of male and female ears and reduce the occurrence of multiple ears. According to different varieties of fertilizer requirements, planting areas, methods, periods, etc., determine the fertilizing elements and ratio. The general varieties in the case of medium soil fertility apply 60 kg of compound fertilizer per acre as the base fertilizer; when 3 to 4 leaves are applied, the nitrogen can be quickly applied to the ditch, and 10 kg of urea or 25 kg of ammonium bicarbonate can be applied per mu; when 12 to 13 leaves, Apply 30 kg of urea or 70 kg of ammonium bicarbonate per mu. Third, timely sowing, reasonable dense planting. 15 cm below the surface, the ground temperature stable at 12 °C for the appropriate sowing period. The general variety of net for the density of 3200 ~ 3500 per mu, intercropping 2500 ~ 2800; compact corn net density of 3500 ~ 3800 per mu, intercropping 3000 ~ 3500 strains. Fourth, field management. Strengthen field management, timely cultivating and weeding, keeping soil loose, finding that multiple spikes are cut off in a timely manner, retaining one or two spikes, avoiding consumption of nutrients, and ensuring the supply and accumulation of nutrients in the target ear. Strengthen the control of diseases, insects, and weeds, and in particular, strengthen the prevention and treatment of leaf spot disease. Pcr Thermal Cycler,Hbv Nucleic Acid Detection,Thermal Cycler Pcr Instrument,Pcr Real Time Detecting System Jiangsu Dinai Bioengineering Co.,ltd. , https://www.dinaipcr.com