What are the precautions for applying chemical fertilizers to crops? How to use farmyard fertilizer correctly?

Fertilization is the most important process in crop planting. Many farmers think that it is enough to apply more fertilizer, but this is not the case. Fertilization also requires skill. To apply fertilizer and apply fertilizer, the following small series will introduce some fertilization techniques in the form of questions and answers.

1. What are the precautions for applying chemical fertilizers to crops?

1. It is not advisable to water immediately after using urea.

2. Ammonium bicarbonate should not be applied to the soil surface.

3. Ammonium bicarbonate should not be applied in greenhouses and greenhouses.

4. The ammonium nitrogen fertilizer should not be mixed with alkaline fertilizer.

5. Nitrate fertilizer should not be applied in rice fields.

6. Ammonium sulfate should not be applied for a long time.

7. Phosphate fertilizer should not be dispersed.

8. Potassium fertilizer should not be applied in the late stage of crops.

9, containing chlorinated fertilizers should not be applied alone for a long time, and avoid the application of chlorine crops.

10. Nitrogen-containing compound fertilizer should not be used in large quantities in legume crops.

Second, how to use farmyard fertilizer correctly?

1. Compost: Fertilizers made from weeds and garbage as raw materials can be used according to local conditions. It is best to combine spring and autumn tillage to make base fertilizer.

2, green manure: It is best to do the base fertilizer or top dressing of legume crops, and use the nitrogen fixation of rhizobia to improve soil fertility.

3, sheep manure: is a hot fertilizer, more suitable for mixed with pig manure, suitable for cool soil and shady slopes.

4, pig manure: organic matter and nitrogen, phosphorus, potassium content, rotten pig manure can be applied to a variety of soils, especially suitable for well-drained hot soil.

5, horse manure: organic matter, nitrogen, cellulose content is high, containing high-temperature fiber decomposition bacteria, fermentation in the accumulation faster, high heat, suitable for wet and heavy soil and cloudy slope and more serious soil.

6, cow dung: low nutrient content, is a typical cool fertilizer, drying cow dung, mixed with 3-5% of plant ash or phosphate rock powder and horse manure for accumulation, can accelerate the decomposition of cow dung, improve its Fertilizer effect, preferably combined with hot fertilizer, or applied to sandy soil and sunny slopes.

7. Human excrement: It can be used directly after fermenting and decomposing. It can also be mixed with soil to make large manure for top dressing.

8, poultry fertilizer: high nutrient content, can be used as seed fertilizer and top dressing, most suitable for vegetables.

3. Why can the manure organic fertilizer be fully fermented before it can be applied?

Undecomposed fecal organic fertilizers carry a large number of pathogenic microorganisms and parasitic aphid eggs. When applied to farmland, some of them adhere to crops and cause direct pollution, and some enter the soil to cause indirect pollution.

In addition, after the unfertilized manure organic fertilizer is applied to the soil, it must be fermented before being absorbed by the crop. On the one hand, the high temperature causes the burning phenomenon, and on the other hand, the ammonia gas is released, so that the plant grows poorly. Be sure to fully decompose when applying manure-based organic fertilizer.

The above is the compiling technique of Xiaobian's finishing, but farmers should also pay attention to the fact that crop fertilization must also be adapted to local conditions.

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