How to apply fertilizer to summer corn
Topdressing plays an important role in the fertilization of corn. It can follow the demand of corn for nutrients and timely apply trace amounts of fertilizer. The role of topdressing is to achieve the goal of "tap stalk, tapping, and attacking grain". The 400-kilogram summer maize can only be topdressed with nitrogen once, and 25-35 kilograms of urea can be applied deep in the 7- to 8-leaf stage of corn. For summer maize with 500-600 kilograms per mu, corn can be grown under the precondition of applying fertilizer. Trumpet phase deep application of urea 35 ~ 40 kg; for per mu yield of 600 ~ 700 kg of corn in the application of fertilizer on the premise of two separate top dressing: in the corn 7 ~ 8 period of deep application of urea 20 kg in corn During the big bell mouth period, 25 kg of urea is applied deep; for summer maize with 750 kg per mu, the top dressing is applied three times in the premise of application of fertilizer: in the 7-8 leaf stage of maize, 20 kg of urea is deeply applied at the corn bell mouth stage. Deep application of urea 25 to 30 kilograms, in the tasselling period of corn deep "Yugong" brand compound fertilizer (18-17-10) 15 to 20 kilograms.