Urea coating is an economical and efficient method in NPK fertilizer production process. Coated fertilizer can release nutrients slowly according to crop needs. In agricultural use, this fertilizer can simplify agricultural operations. At the same time, urea coating can greatly improve the efficiency of fertilizer utilization. In industrialized NPK fertilizer processing, we use fertilizer coating machine to coat urea with humic acid, sulfur and other materials.
Humic acid can be used as coating material for urea. This combination of humic acid and urea produces various types of humic acid fertilizers, such as humic acid compound fertilizer, sodium humate, ammonium humate, etc. In terms of fertilizer effect, the fertilizer effect of humic acid coated urea on crops was prolonged by about one month compared with that of common urea with the same nitrogen content, and the utilization rate of nitrogen element was significantly improved. The economic benefit of humic acid coated urea is high, and the profit after agricultural harvest is greatly improved.
Sulphur coated urea is also a common mode of NPK fertilizer production process. Because sulfur is the nutrient needed by plants themselves, it can improve the efficiency of nitrogen absorption, and it is harmless to the environment and biology. Fertilizer coating machine is used in NPK fertilizer production process, which has good processing performance, simple operation and low production cost. Sulphur can not only reduce the loss of nitrogen in soil, but also greatly increase the number of soil microbial strains, increase soil activity and improve soil performance.
When processing NPK fertilizer, the coating machine coats urea, which can avoid the secondary pollution of fertilizer. At the same time, the industrialized fertilizer equipment reduces the cost of fertilizer and improves the agricultural income.