Rice and wheat straw is a kind of biological resource, which contains mineral nutrients and organic matter such as nitrogen, phosphorus, potassium, calcium, magnesium and protein. Livestock manure contains a lot of protein, B vitamins, mineral elements, crude fat and a certain amount of carbohydrates. On the one hand, the application of straw manure mixed organic fertilizer can increase the content of soil organic matter and a variety of bioactive substances, improve soil physical, chemical and biological properties, and improve soil fertility; On the other hand, it can provide gradual, continuous and comprehensive nutrient supply for crops, which can not only increase crop yield, but also improve the quality of agricultural products. The combined application of organic fertilizer and inorganic fertilizer can also improve the utilization rate of chemical fertilizer, reduce the amount of chemical fertilizer without reducing production, increase fertilizer efficiency, and promote the healthy and rapid development of rural economy.

The working principle of the organic fertilizer screening machine is that the motor moves and transmits the vibration force to the screen surface, and then makes the materials move. In the process of material operation, the materials fall into the screen box from the feeding end, and then move forward quickly, loosen and penetrate the screen to complete the screening.

Organic fertilizer screening and recycling system: there is a certain difference in the particle size of the granular material output from the granulation and molding system, which requires screening and classification. The selected rotary screening machine requires low vibration, low noise, convenient replacement, and is equipped with a screen surface cleaning device.

It is recommended to equip with an automatic return system of organic fertilizer to separate unqualified large and small particles, which are transported out through a belt elevator, re crushed and then sent to the granulator to continue granulation, which helps to improve the continuous operation capacity of the production line.