Fungal - based: Fungal - based organic fertilizers are fertilizers with fungi as the main active ingredients. Commonly seen ones include Trichoderma and mycorrhizal fungi. They can decompose organic matter, promote the nutrient cycle in the soil, improve nutrient utilization efficiency. They can also inhibit pathogenic bacteria, enhance the disease - resistance of plants, form symbiotic associations with plant roots, improve the stress - resistance of plants, and enhance the quality of agricultural products. When using them, avoid mixing with strong alkaline substances.

Actinomycetes - based: Actinomycetes are heterotrophic microorganisms with relatively high nutritional requirements. They usually need nutrients such as carbon sources, nitrogen sources, inorganic salts, and growth factors. They can utilize various organic substances as carbon sources, such as starch, glucose, cellulose, etc.; nitrogen sources can come from proteins, amino acids, ammonium salts, etc. Actinomycetes - based organic fertilizers have actinomycetes at their core. They can decompose organic matter in the soil, release nutrients such as nitrogen, phosphorus, and potassium, and secrete antibiotics to inhibit harmful bacteria. This not only improves soil fertility and structure, enhances soil air permeability and water - holding capacity, but also reduces crop diseases, helps crops grow robustly, and improves yield and quality. In addition, actinomycetes can also be used for environmental remediation to degrade pollutants in the soil.