Knapsack Fertilizer Machine is an agricultural machine that applies fertilizer or organic fertilizer evenly to the surface of soil by mechanical means and releases it to a certain depth below the surface in a strip manner. According to different application targets, it can be divided into granular fertilizer fertilizer applicator, powder fertilizer fertilizer applicator and organic fertilizer applicator. According to whether it is necessary to hitch tractor, it can be divided into traction fertilizing machine and self-propelled fertilizing machine. According to the difference of the key tissues, it can be divided into disc type and cone type, radial blade type and non-radial blade type.
What are the common mistakes in fertilization? Did you make a mistake? The manufacturer of high precision and accurate fertilizer applicator will tell you:
- Dry the organic fertilizer. Human manure and chicken manure have become the primary base fertilizer for vegetable production in greenhouse, but vegetable farmers often dry the human manure and chicken manure in the field for convenient application. This practice will result in maggot reproduction, nitrogen evaporation and loss of nitrogen content of fertilizer.
- Calcium, magnesium and phosphorus are used as base fertilizers on alkaline soil. Calcium, magnesium and phosphorus are weakly acidic fertilizers, insoluble in water, and can be gradually converted into water-soluble phosphate under weak acid conditions and absorbed by crop roots. If it is applied on alkaline soil, it cannot solve the urgent need for phosphorus for crops and wheat seedlings, resulting in physiological phosphorus deficiency.
- Topdressing shall be removed from the surface of superphosphate. Phosphorus has little mobility in the soil, generally at 0.5 cm of the application point, and its movement range is between 1 cm and 3 cm. If surface application is difficult to reach the rhizosphere of crops, it cannot supplement phosphorus in crops.
- Sprinkle water immediately after urea application. Urea is an acyl ammonia nitrogen fertilizer, which is easily soluble in water and can be converted into ammonium bicarbonate after being applied to soil and absorbed by crops. If water is sprayed immediately after surface application, urea will easily be lost along with water, reducing fertilizer efficiency.
- Ammonium bicarbonate is applied with water. This method often forms a large amount of fertilizer in the water inlet, crops grow in different ways, and it is difficult to manage. In the afternoon, the greenhouse temperature rises, ammonia escapes from the soil, fumigating the lower leaves of crops and causing fertilizer damage.