In today's green agriculture development, organic fertilizer, with its advantages of "turning waste into treasure and nourishing the soil," has become the first choice for growers. Many people are curious about how straw and livestock manure in the fields are transformed step by step into uniformly granulated, nutrient-rich organic fertilizer. In fact, behind this lies a scientifically rigorous organic fertilizer production process, with each step affecting the quality of the final product.
The "birth" of organic fertilizer begins with the collection of diverse raw materials. Common raw materials are mostly agricultural waste, such as corn and wheat straw, livestock manure (cattle, sheep, pigs), kitchen waste, and fallen leaves. These seemingly useless wastes are the core raw materials for organic fertilizer. However, after collection, they must first be screened and impurities removed, such as stones and plastics, to ensure the purity of the raw materials.
Raw material pretreatment is the "basic process" of organic fertilizer production. Straw needs to be crushed to 2-5 cm to facilitate subsequent fermentation; livestock manure needs to be initially dried to reduce its moisture content. Meanwhile, staff will scientifically mix the raw materials, adjusting the carbon-to-nitrogen ratio to 25-30:1. This ratio ensures more thorough fermentation and avoids incomplete decomposition.
Fermentation is the key to the transformation of organic fertilizer and is also the most time-consuming step. The pre-treated raw materials are piled in fermentation tanks, inoculated with specialized microbial agents, and fermented using windrow or trough methods, maintaining a constant temperature of 55-65℃. During this period, a windrow or trough-type compost turner is needed to regularly turn the piles, ensuring sufficient air contact and promoting microbial activity. After 1-2 months of fermentation, the raw materials will transform from messy waste into dark brown, odorless, matured matter, and pathogens and insect eggs will be killed by the high temperature.
After fermentation, the material enters the deep processing stage. The matured matter is crushed and sieved again to remove incompletely decomposed impurities. Then, it is granulated into uniform particles using a granulator, followed by low-temperature drying to control the moisture content below 15% to prevent clumping and mold growth. This step enhances the appearance of the organic fertilizer and facilitates storage and transportation.
Finally, there's the factory testing stage. Staff will conduct random sampling tests on the finished product, focusing on indicators such as organic matter content, total nitrogen, phosphorus, and potassium content, and heavy metal residues to ensure compliance with national standards. Only organic fertilizer that passes these tests can be packaged and stored, ultimately reaching the fields to provide natural nourishment for crops.
From waste materials to high-quality organic fertilizer, every step embodies science and craftsmanship. It not only solves the problem of agricultural waste pollution but also nourishes the soil, improves the quality of agricultural products, and becomes a vital link between ecological protection and green agriculture.
