In the organic fertilizer fermentation process, the compost turner plays an important role, and its main functions include:

1. Promoting ventilation: The compost turner increases the air circulation inside the compost by turning and mixing the compost. This helps to provide sufficient oxygen to aerobic microorganisms, promote their metabolism and ability to decompose organic matter, and thus improve the fermentation efficiency.

2. Even mixing: The compost turner can fully mix the various raw materials in the compost to ensure that the different components are evenly distributed. This helps to evenly ferment, avoid local overheating or incomplete fermentation, and improve the quality and effect of the fertilizer.

3. Regulating temperature: By turning the compost, the compost turner helps to regulate the temperature of the compost. Microbial activity during the fermentation process generates heat. The operation of the compost turner can make the heat more evenly distributed in the compost, prevent local overheating, and thus maintain a suitable fermentation temperature (generally 55-65°C).

4. Accelerating decomposition: The compost turner accelerates the decomposition process of organic matter through continuous turning and stirring. This can shorten the fermentation cycle, allowing organic fertilizer to complete fermentation faster and become mature fertilizer.

5. Reduce odor: During the compost turning process, the compost turner helps release odorous substances in the compost into the air and reduce the accumulation of odor in the compost. By improving the ventilation and humidity conditions of the compost, the generation of odor is reduced.

6. Promote uniform moisture: The compost turner helps adjust and distribute the moisture in the compost to avoid local over-wetting or over-drying. The appropriate moisture content is essential for the smooth progress of the fermentation process.