"Two Difficulties" in Qiandao Lake: Silver carp and bighead carp have been stocked for 60 years, so as to "raise fish with water and raise water with fish"

Qiandao Lake is known as "the best water in the world" among the rivers and lakes in China. It's actually very difficult to get this reputation. In addition, for Qiandao Lake, the water quality in the lake area is related to the prosperity of tourism. Next, I will tell you about the "two difficulties" of Qiandao Lake. Many years ago, some people realized the importance of "raising fish with water and raising water with fish" and began to increase silver carp and fish. Some researchers tell us that silver carp and bighead carp grow by filtering plankton in water. According to statistics, these fish need to consume 40 kilograms of plankton per 1 kg body weight.

This means that they can effectively reduce the content of nitrogen and phosphorus in water, which is quite powerful, isn't it? Therefore, they are called "cleaners" of water bodies. Some experts and scholars agree that stocking a certain amount of silver carp and bighead carp in Qiandao Lake can inhibit the growth of cyanobacteria; People only need to fix the fish output and catch it reasonably. We are very satisfied with the result. You will notice that the existing research has proved that if the number of silver carp and bighead carp in the water is below a certain level, it will be impossible to curb the wanton growth of "water bloom". I still remember that from 65438 to 0998, there was a serious "water bloom" incident in some areas of Qiandao Lake, which also explained the silver carp and bighead carp in the lake at that time.

In fact, the relevant survey results are very complicated. For example, silver carp and bighead carp can't reproduce naturally in Qiandao Lake, so people need to replenish a certain number of silver carp and bighead carp species to ensure the reserve of organic silver carp and bighead carp in Qiandao Lake. Can we do it better in some ways? Therefore, based on some data, people have implemented a quota fishing system. In order not to harm this fish when fishing, this new weapon-floating living water fishing boat came into being. Through its special water intake and drainage structure, fish can swim directly to the cabin after pulling the net, and any change can not be done overnight. These have been repeatedly pondered and tested, and finally a different operation mode from traditional fishing has been obtained, and it has been transformed into a refined one. In the transportation of live fish, the relevant companies have paid a lot of "tuition fees".

An old employee in charge of distribution explained that in the era when the expressway network was not formed, the first problem was that once the fish truck broke down halfway, it needed to be replaced at night, which meant that every once in a while, the transporters needed to pay attention to water quality, water temperature, oxygen content and PH value. Everything I did at that time will make people feel happy and relieved today. Remember 1959, Chun 'an County designed and built the first Xin 'anjiang Reservoir in China. At that time, about 300 thousand people chose to leave their homes. Since then, people have seen 300,000 mu of fertile land become a beautiful lake, that is, the vast Qiandao Lake. Its total storage capacity is almost 3000 West Lakes, so Guo Moruo is also doing something.

Today, Qiandao Lake in Zhejiang Province is famous for its water and fish, so Chun 'an, a famous ecological and cultural county in western Zhejiang, is well known. We are lucky, because the fish species in Qiandao Lake area have reached 1 14, and the fishery resources150,000 tons. The water body of Qiandao Lake also maintains the national first-class water quality standard all the year round. This is the whole content of this video.