Jiangsu Dafeng: Fisheries Experts Send Technology to Tangkou Demonstration

Dafeng City, Jiangsu Province has a freshwater aquaculture area of ​​225,000 mu. The main cultured species are silver carp, and silver carp is the dominant dominant species in Dafeng City. Its aquaculture production accounts for more than 85% of the city's freshwater aquaculture production.

On September 18th, the county-level experts received a call from demonstration household Jiang Jinbao, reflecting the recent phenomenon of abnormal water quality in the pond. County experts immediately took “Dr. Water” to Tangkou of the model household to measure water quality. County experts pointed out that the pond water temperature was appropriate in September and the food intake of the silver carp was increased, but the pond fish density was high. At the bottom of the pond during the rearing period, a large amount of organic matter was often accumulated, showing reduced anoxic state, high organic matter content, and pH value. Low, high nitrite content.

County experts emphasized that the most important task at this stage is to strengthen pond water quality management. The main measures: First, fertilize and maintain the appropriate fatness of the pool water, the transparency is controlled within 30cm, and the water color of the pool water is suitable from light green to green; secondly, the aerator can be opened for about 3 hours in the sunny noon fertilizer pond. The surface high dissolved oxygen water is exchanged to the bottom of the pond; the third is the Tangkou of pool water aging, and some of the pool water is changed according to the water quality of the source water to reduce the soluble organic matter in the pool water, and photosynthetic bacteria and EM bacteria can also be used to degrade the organic matter in the pool water. .

Demonstration household Jiang Jinbao listened carefully to the views of county-level experts and took corresponding measures in a timely manner. At present, the water quality has been greatly improved. Later, he specifically came to the county promotion station to thank the experts for their timely assistance and was honoured to be a model household. He said that the fishery technology home project is a service that truly serves the fishermen and does practical work. He also said that as a model household, he will actively bring the surrounding farmers together to become rich.