Organic fertilizer, as an ecological key to protecting soil health, undergoes a green transformation, turning waste into treasure. It integrates scientific processes with natural laws, converting organic waste such as livestock manure and straw into high-quality fertilizer to nourish crops, thus contributing to sustainable agricultural development.
The first step in production is raw material pretreatment, which is fundamental to ensuring the quality of organic fertilizer. Workers collect raw materials such as livestock manure, straw, and sawdust, first removing impurities such as plastics and stones, then crushing hard materials like straw to a suitable particle size to increase the contact area with microorganisms. Subsequently, carbon and nitrogen sources are mixed in a specific ratio, adjusting the carbon-to-nitrogen ratio to the ideal range of 25:1 to 30:1, while controlling the moisture content at 50%-60%, achieving the standard of "forming a clump when squeezed but crumbling upon impact," preparing for fermentation.
Fermentation and maturation are the core processes in organic fertilizer production, requiring three stages: heating, high temperature, and cooling. Workers then pile the mixed raw materials into standardized stacks, adding compound microbial agents to activate microbial activity. Within 1-3 days, the pile temperature rapidly rises to above 50℃, entering the heating phase. This is followed by maintaining a high temperature of 60-65℃ for 3-5 days, effectively killing pathogens, parasite eggs, and weed seeds. Afterward, the temperature gradually decreases to room temperature. During this period, the pile needs to be turned regularly using a compost turning machine, once a day during the high-temperature period, to ensure aerobic fermentation and prevent foul odors.
After fermentation, the material needs to enter the aging stage, remaining still for 10-15 days for further maturation and stabilization, eliminating the risk of secondary fermentation damaging the roots. Then, it undergoes crushing and sieving to remove large, incompletely decomposed pieces, resulting in a uniform fertilizer texture. The sieved material enters the granulation process, where a granulator turns the loose material into granules, facilitating storage and transportation, controlling the fertilizer release rate, and improving effectiveness. After granulation, the granules undergo drying and cooling. The granulated fertilizer is sent to a dryer to remove excess moisture to below 15% to prevent mold growth during storage. It is then transferred to a cooler to cool the dried, high-temperature granules to room temperature, preventing clumping and deformation. Finally, the product is weighed, bagged, and labeled with relevant information using an automated packaging machine, completing the finished product production. The entire process must comply with relevant national standards to ensure the product is safe and harmless.
The organic fertilizer production process not only realizes the resource utilization of organic waste and reduces environmental pollution, but also improves soil structure and enhances crop quality. From raw material pretreatment to finished product delivery, every step embodies science and craftsmanship, transforming waste into "soil gold," injecting lasting momentum into the development of ecological agriculture, and composing a green circular economy.
