What are the precautions for crop fertilization?
Now crop fertilization has become an indispensable item for our crops, but can you really fertilize it? Let's see what we should pay attention to when we fertilize.
1. Fertilizers with higher phosphorus content should not be used for vegetables.
2. Potassium fertilizer should not be used in the later stage of crop growth.
3. Rare earth fertilizers should not be directly applied to the soil.
4. It is not advisable to over-apply fertilizer regardless of crop variety and growth period.
5. Unripe farmhouse manure and cake fertilizer should not be used directly. The farmhouse manure and cake manure should be retorted first, and then used after high temperature or chemical treatment.
6. Chemical fertilizers containing chlorine should not be used on saline-alkali soils and chlorine-free crops. Chlorine-free crops include tobacco, fruit, sugar beet, potato, watermelon and so on.
7. Nitrogen fertilizers should not be applied shallowly or before watering. Nitrogen fertilizers are generally converted into ammonium nitrogen after being applied to the soil, which are easily volatilized with water loss or under the action of light and heat, and lose their fertilizer efficiency.
8. Ammonium nitrogen fertilizer should not be mixed with alkaline fertilizers such as plant ash.
9. Nitrogen fertilizer should not be applied to legume crops. There are nitrogen-fixing rhizobia in the roots of leguminous crops. Excessive application of nitrogen fertilizer will not only cause waste, but also make the crops greedy and late, which will affect the yield.
10. Phosphate fertilizers should not be used dispersedly. Phosphorus in phosphate fertilizer is easily absorbed and fixed by the soil and loses fertilizer effect. Phosphate fertilizer and manure should be mixed and piled for a period of time, and then applied in furrow or hole near the roots of crops.