Deqing, a county in Zhejiang Province, is known as a “land of water” for its intricate network of waterways, canals and lakes. This abundance of water provides a strong foundation for freshwater aquaculture, fostering the production of lustrous pearls. For centuries, the people of Deqing have practiced a unique freshwater pearl composite farming system centered on “fish-mussel co-culture.”
In this integrated aquaculture model, fish feed on aquatic plants, mussels absorb nutrients from fish waste and purify water, and pearls are cultivated within the mussels. The system simultaneously enhances water quality, restores ecological balance and generates dual economic value—from both fishery yields and premium pearl production.
This model, officially called the Zhejiang Deqing Freshwater Pearl Mussel Composite Fishery System, or simply the Deqing Pearl System, received global recognition on May 21,…
