In the Yinglong Lake Reservoir in the Nan'an District, there was a drizzle of rain. The master boatman Wang Lixin and the person in charge of the reservoir Fan Wancheng drove the patrol boat to the center of the lake.
The lake is blown by the autumn wind, the blue waves are rippling, the fish jump out of the water from time to time, and the reflections of the trees on the lakeshore are interesting. Fan Wancheng couldn't help sighing at the scene in front of him: "Yinglong Lake Reservoir, which was once eutrophic, is not easy to reproduce the water and fish!"
Fan Wancheng said that in recent years, Yinglonghu Reservoir has achieved both economic and ecological benefits through the implementation of the ecological breeding model of "fishing with water and purifying water with fish".
The Yinglong Lake Reservoir was officially put into use in 2008, and has multiple functions such as agricultural irrigation water and drinking water for humans and animals. The total storage capacity of the reservoir is nearly 18 million cubic meters, which mainly provides production and domestic water for four towns and towns of Yinglong, Changsheng, Guangyang and Xiakou, as well as Chayuan New Town.
Fan Wancheng and Wang Lixin also took up the responsibility of protecting the ecological environment of the reservoir from then on.
At first, the water quality of the reservoir was relatively good, but two years later, a worrying problem occurred - the water body began to become eutrophic.
"Duckweed, blue-green algae, water hyacinth, etc. grew in large quantities in the water, and the water became turbid." Fan Wancheng recalled that because it was a drinking water source, chemical drugs could not be used to remove phytoplankton, and only manual salvage was required. It takes several tons of phytoplankton to fish every day, but the effect is not good, and the phytoplankton will grow back very quickly."
In 2011, Liangjiang Fisheries, a subsidiary of Chongqing Water Investment Group, promoted the ecological aquaculture model of "raising fish with water and purifying water with fish", and the water quality of Yinglong Lake Reservoir was improved.
The relevant person in charge of Liangjiang Fisheries said that the ecological breeding model of "fishing with water and purifying water with fish" is to put fish fry into the reservoir. Algae, water purification with fish and other functions.
"The silver carp and silver carp fry were cast in that year, and then a batch of adult fish was caught every year, and a batch of new fry was put in. The water quality of the reservoir gradually returned to its former clearness," said the person in charge. Reservoir ecological fish farming is different from other farming methods. No fertilization or medicine is used. It mainly breeds silver carp, silver carp and other fish that can purify water quality.
While taking into account ecological protection, the small reservoir "swim" out a large ecological fish industry. Today, the Yinglong Lake Reservoir's ecological aquaculture model of "raising fish with water and purifying water with fish" has been promoted in more than 70 reservoirs in the city, producing more than 5 million catties of fish every year and selling well in the city center of our city. At present, Liangjiang Fisheries is opening up the entire fishery industry chain of "Fanjiaqiao Seedling Farm - Yinglong Lake Large-Scale Fish Farm - Fish Reservoirs in Districts and Counties - Four Area Transit Bases - Featured Processing Plants - Brand Marketing Network - Dining Tables". Brighten the brand of "Yuhu Reservoir Fish".
"Next, we will plant more aquatic plants on the water surface of Yinglong Lake Reservoir to absorb harmful substances in the water, provide an original ecological growth environment for fish, and make the ecosystem of the reservoir more diversified and three-dimensional, which not only purifies the water, but also Improve the quality of fish." said the relevant person in charge of Liangjiang Fisheries.
