4. base fertilizer: solid humic acid fertilizer (such as ammonium humate, etc.), generally every 6 mu dosage of 100-150 kg. When humic acid solution is used as base fertilizer, the concentration is 0.05-0.1%, and 250-400 litres of water solution is used for every 6 mu, which can be mixed with farm manure for application, ditch application or hole application.
5. Topdressing: before the seedling stage and heading stage of the crop, 250 liters of water solution with 0.01 to 0.1% concentration is used for every 6 mu to irrigate the root system of the crop. Paddy fields can be applied along with irrigation or water surface splash, can play a seedling, strong seedlings, promote growth and development, and so on.