Fertilization principle of corn
(2) Topdressing: Topdressing is generally carried out by secondary topdressing. The first time is to raise the seedling fertilizer. The period is “small trumpet period. The quick-acting fertilizer ammonium bicarbonate is used, 30-50 kg per mu, and it can be combined with cultivating. Weeding and cultivating soil, the fertilizer is covered with soil after application. The second top dressing is the attacking panicle fertilizer, taking the attack of the pole and the attack (the key to corn fertilization), and selecting urea as the top dressing. The application period is “big bell mouth periodâ€, generally per mu. Application of urea 30 ~ 50 kg, combined with cultivating and weeding soil application, urea after application, covered with soil, the specific method can be used deep drilling, for some zinc, iron, boron and other trace elements of arable land, spraying at the early jointing stage 0.3 The % ferrous sulfate ferrous or 0.2% borax solution has a significant yield increase effect.
Hua County: Yue Xiuli