Su Shi, the great writer and calligrapher of the Northern Song Dynasty, has a hidden identity, do you know what it is? That is the No. 1 food blogger in the Northern Song Dynasty, who once discovered Hainan's special delicacy - oysters with the perseverance of foodies in Hainan, where living materials are scarce. Su Shi praised oysters as "very beautiful to eat, and there is no beginning". Oysters are also a rare specialty food in China's southern coastal cities, such as oyster chicken hot pot, oyster branding, oysters in juice and so on.
Oysters, also known as oysters, oysters, etc., scientific name oysters, belong to the phylum molluscs, bivalves, pearl oysters, oyster family, delicious meat, rich in nutrition, mollusk protein content of more than 50%, is a high-protein aquatic product, known as "marine milk". Moreover, oysters also contain a lot of vitamin A, vitamin B1, vitamin B2, vitamin D, taurine, zinc, etc.
China's oyster aquaculture production accounts for more than 80% of the world's total, with an annual output of about 5.4 million tons, accounting for 35% of China's total shellfish production and 25% of the total marine aquaculture4%, with an annual output value of tens of billions of yuan, driving the employment of millions of people in the industrial chain, and occupying an important position in marine aquaculture. At present, most of the common oysters in the market in China are from Guangdong Province, such as Zhanjiang oysters, Taishan oysters, Yangjiang Chengcun oysters and so on. Among them, Yangjiang Chengcun oysters come from Yangjiang, which is known as the "Oyster Capital of China", and "Chengcun oysters" have become national geographical indication protected products due to their fatty and tender meat and excellent quality. In recent years, Yangjiang has explored a new path of "oyster +" to leverage the big economy with small oysters, and the city's oyster breeding area has reached 750,000 mu, with an annual output of 410,000 tons, ranking first in Guangdong.
Fact**: Fishermen in Qiuzhugang Village, Changchun Town, Xiapu County, Fujian Province, embark on a boat from the wharf and go out to sea to harvest oysters.
Oyster meat can be used for eating, refining oyster sauce, extracting beneficial ingredients, etc., and oyster shells can be used as oyster seedling attachment base, water purification agent, soil amendment, animal mineral nutrition improver, etc.
Oysters also have important ecological value. One is that it can form oyster reefs, which can provide habitat and refuge for small marine life, which is conducive to improving biodiversity. In the event of a typhoon or wave, oyster reefs can effectively reduce the impact and damage of waves, and reduce the erosion of coasts and shores. The second is that oysters are a filter-feeding shellfish, which converts suspended organic matter in the water environment into shells and oyster meat, and brings carbon, nitrogen, phosphorus and other substances out of the water body through the harvest of oysters, avoiding eutrophication of the water body and making the water quality clear and beautiful. The growth process of oysters absorbs a large amount of carbon dioxide to form oyster shells, which has a strong carbon sink effect and can reduce the global warming effect.
Review expert: Chen Rui, Ph.D., Institute of Zoology, Chinese Academy of Sciences.
Department of Science Popularization of China Association for Science and Technology.
Xinhua. Co-produced.
*: Popular Science China - Green and Dual Carbon).