What are the benefits of sweet potato pits in winter?

Sweet potatoes are harvested from tuberous roots. Fresh potatoes are large in size, high in water content, tender in tissue and crisp in skin, and vulnerable to chilling injury and diseases.

Sweet potato still has a strong respiratory function during storage, and its respiratory intensity is ten to dozens times higher than that of cereal seeds. When o2 is sufficient, sweet potato carries out aerobic respiration, inhales more o2, and releases more co2 and heat. When o2 is insufficient, sweet potato breathes anaerobically, producing alcohol, co2 and a small amount of heat. Alcohol is toxic to potato pieces, which easily leads to pit rot.