Bacillus amyloliquefaciens

Introduction

Bacillus amyloliquefaciens is a robust decomposer that plays a significant role in compost enhancement, especially for suppressing pathogenic fungi and improving microbial succession. It functions across thermophilic and mesophilic compost phases and is often included in high-quality compost inoculant blends.

Scientific Description

A member of the B. subtilis group, B. amyloliquefaciens is well known for its:

• Production of antifungal compounds (iturin, surfactin, fengycin)
• Enzyme secretion (amylases, cellulases, proteases)
• Heat tolerance, allowing it to function during early composting stages
• Survivability via endospores, ensuring long-term presence in stored compost

It improves compost quality, accelerates decomposition, and reduces pathogen load in the final product.

Benefits

• Suppresses Fungal Pathogens: Limits Rhizoctonia, Sclerotinia, and other compost-borne pathogens.
• Improves Compost Stability: Breaks down residual starches and proteins.
• Enhances Microbial Diversity: Promotes beneficial bacterial succession in curing phase.
• Reduces Odors and Rot: Inhibits anaerobic bacteria in improperly turned compost piles.
• Improves Soil Inoculation Value: Compost enriched with B. amyloliquefaciens can support plant immunity post-application.

Uses

• Waste Types: Vegetable market waste, kitchen waste, oilseed cake, protein-rich organics, coir pith.
• Application:
  • Compost starter: 1–2 kg dry or 1–2 L liquid per ton of compost
  • Integrated with other decomposers: Often paired with Trichoderma, Bacillus licheniformis, and Pseudomonas fluorescens
• Best Conditions: Active in 35–50°C; prefers 60–65% moisture and well-aerated piles

Trivia

• Its dual identity (decomposer + biocontrol) makes it popular in premium compost brands.
• Some commercial fortified composts specifically list it for nursery tray and greenhouse use.
• Also used in biofertilizer teas for foliar and root zone applications.