In organic fertilizer production, the carbon-to-nitrogen ratio (C/N ratio) and fiber content of raw materials are two key factors affecting fermentation efficiency and product quality. Balancing these two parameters has become a core technical challenge in producing high-quality organic fertilizers.

In organic fertilizer production process, optimal C/N ratio (25-30:1) ensures efficient microbial activity during composting, while proper fiber content maintains aerobic conditions. These factors directly determine fermentation speed, temperature stability, and final product quality. Correct C/N balance prevents nitrogen loss, and adequate fiber creates porous structure for oxygen circulation – both critical for successful decomposition and nutrient preservation in organic fertilizer manufacturing.

Solutions for C/N Ratio Imbalance

The ideal C/N ratio should be maintained between 25-30:1. Too high will lead to nitrogen deficiency and slow fermentation; too low will cause nitrogen loss and ammonia volatilization.

  1. Scientific Raw Material Formulation
    Mix high-carbon materials (such as straw, sawdust) with high-nitrogen materials (such as livestock manure, soybean meal) in proportion. For example: mixing cow manure (C/N about 20:1) with wheat straw (C/N about 80:1) at a 3:1 ratio can achieve the ideal C/N ratio.
  2. Adding Nitrogen Source Adjusters
    For materials with excessively high C/N ratio, inorganic nitrogen sources such as urea and ammonium sulfate, or nitrogen-rich organic wastes like oil cake and fish meal can be added to quickly reduce the C/N ratio.

Innovative Methods for Fiber Treatment

Excessive fiber content can hinder microbial activity and affect fermentation uniformity. Modern solutions include:

  • Mechanical Pretreatment: Use crushers and shredders to break fibrous materials into 3-5cm pieces, increasing surface area
  • Bio-enzymatic Technology: Add cellulase and hemicellulase preparations to accelerate fiber decomposition
  • Composite Strain Fermentation: Select strains specialized in fiber decomposition (such as Trichoderma and white rot fungi) combined with conventional fermentation strains

Comprehensive Optimization Strategy

In actual production, we recommend the “three-step method”:

  1. Test and analyze raw materials to determine initial C/N ratio and fiber content
  2. Design formulations based on test results, adding adjusters when necessary
  3. Adopt appropriate pretreatment processes and optimize fermentation conditions

By precisely controlling these two key parameters, not only can the fermentation cycle be shortened by more than 30%, but the nutrient content and biological activity of organic fertilizers can also be significantly improved, providing higher quality products for organic agriculture.

 

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