The correct use of fertilizer

1. Popularize soil testing and formula fertilization.

2. Popularize the deep application of base fertilizer. The existing deep loosening machine, seeder deep application. Some farmers fertilize the corn along the ridge after emergence, and the effect is good.

3. Two times of fertilization are generally used for topdressing. The first time is to apply seedling fertilizer in the small trumpet mouth stage, using quick-acting fertilizer ammonium bicarbonate, applying 30----50kg per mu, topdressing can be combined with intermediate ploughing, weeding and soil mulching. The second topdressing was stalk and panicle fertilizer, urea was selected as topdressing fertilizer, and the application period was the big trumpet stage. Generally, urea 20---30kg was applied per mu, which should be applied before rain or before watering and covered with soil after application.

4. For some arable land lacking zinc, iron, boron and other trace elements, spraying 0.3% ferrous sulfate or 0.2% borax solution at jointing and booting stage can significantly increase the yield.

5. Straw mulching or crushing and returning to the field. Zhang Fangfang