Maize growth has entered the big bell-mouth period, corn plant growth speed, absorption of nutrients, is the key period for sucking fertilizer. After flowering and pollination, the rate of absorption slowed. Therefore, we must do a good job of managing fertilizer and water during this period, so as to promote large-scale production. Heavy ear fertilizer. Topdressing panicle fertilizer can not only improve the efficiency of photosynthesis, promote the growth of the leaves of the panicle and several leaves above and below, but also can prolong the life of the leaves and promote the fullness of the grain. The application time of panicle fertilizer is 10~15 days before the tassels are extracted from corn. In general, maize should be applied when 15~17 leaves are visible or 9~11 leaves are unfolded. This period is a crucial period for determining the size of the ear and the number of grains. This period coincides with the fecundity of maize florets in the period of differentiation. The absolute amount and accumulative rate of absorption of nutrients by the stems and leaves and the ear reach the peak. Roots need to absorb large amounts of nutrients from the soil, and the nutrients of various organs quickly. Lost to the ear. Applying panicle fertilizer at this time can significantly increase corn yield. If the basal fertilizer is sufficient and the growth is strong, it may be appropriate to apply the panicle fertilizer later. It is advisable to use a small number of plants in the whole field to start pumping. The lean growth potential of the base fertilizer is insufficient, and the panicle fertilizer should be applied early. Panicle fertilizer should use fast-acting nitrogen fertilizer, usually applying 15 to 20 kg of urea per acre. Qiao Shi top dressing outside. The grain filling period is a crucial period for determining the number of corn kernels and grain weight, and it needs sufficient nutrient supply. At this time, soil fertilization not only uses more fertilizer, but also has a slower effect. If the foliar fertilizer is applied, the effect is fast and the effect is remarkable. Available urea 1.5 kilograms, potassium dihydrogen phosphate 100 grams, 50 to 60 kilograms of water spray, spray usually 2 to 3 times. Shenzhen Sunson Tech Co., Ltd , https://www.sunsonkiosk.com