How to use fertilizer?The common 10 kinds of fertilizers are used as the basis, and the base fertilizer and top dressing are not used indiscriminately.

How to use fertilizer?The common 10 kinds of fertilizers are used on a basic basis, and the base fertilizer and top dressing are not used indiscriminately!

1. Potassium dihydrogen phosphate: It is currently mostly used for soaking seeds and top dressing outside the roots, and it is also often sprayed directly with foliar fertilizer, which has very good effects.

2. Urea: The pH is neutral and it is suitable for all kinds of soils and various crops. It is suitable for base fertilizer and top fertilizer, but it cannot be grown as fertilizer.

3. Nitrogen and potassium compound fertilizer: it should be used as top dressing for crops that like potassium and avoid chlorine.

4. Nitrogen and phosphorus compound fertilizer: It is suitable for all kinds of soils and all kinds of crops. It should be used as a base fertilizer. If it is used as a top dressing, it should be applied early. When planting fertilizer, it should not be in direct contact with the seeds.

5. Nitrogen, phosphorus and potassium compound fertilizer: it should be used as base fertilizer and early top fertilizer, and the focus is on “early” top fertilizer.

6. Ammonium chloride: Physiologically acidic fertilizer, can be used as base fertilizer, top fertilizer, and cannot be used as seed fertilizer.It is suitable for calcareous soil or partially acidic soil, but it should not be applied to saline and alkaline soil and tobacco, grapes, potatoes and other chlorine-free crops.

7. Ammonium nitrate: It is weakly acidic and can be used as top dressing, not as base fertilizer or seed fertilizer.It should not be mixed with organic fertilizers, piled and retted, and should not be applied to crops in early spring; it is applied to paddy fields with poor effect due to denitrification, and it is commonly used for crops in dryland areas.

8. Potassium sulfate: Physiologically acidic fertilizer, which can be used as base fertilizer and top dressing. Potassium sulfate is suitable for all kinds of crops, especially those that avoid potassium chloride. It should be applied appropriately and intensively.

9. Ammonium carbonate: It is weakly alkaline, can be used as base fertilizer and top fertilizer, and cannot be used as seed fertilizer. It should be applied in depth or covered with soil for about 10 cm when applied, and should not be mixed with ammonium nitrate and superphosphate.

10. Potassium chloride: Physiologically acidic fertilizer, suitable as a base fertilizer, should be applied on acidic soil, it is best to cooperate with the application of organic fertilizer or lime, saline and alkaline land should not be applied, and chlorine-free crops should not be applied.