Agriculture Idol

Chapter 72 Governance
Li Chengxin knows that the growth and disappearance process of red tide can be roughly divided into four stages: initiation, development, maintenance and extinction. In the initial stage, there are a certain number of red tide organisms in the sea area, and various physical and chemical conditions in the water environment at this time The conditions are basically suitable for the growth and reproduction of certain red tide organisms.

However, the seawater in the initial stage cannot see the color change. As long as the color change appears, it has at least entered the development stage.

Surprisingly, the red color inside the experimental sea area enclosed by Li Chengxin's biological water purifier mussels hanging net is much lighter than that outside.

The live footage faithfully recorded all of this. Some people once questioned Li Chengxin and Brother Xiaoyong when they built this biological water purifier, but seeing the contrasting scene in front of them, they turned into civilian scientists one after another.

【Isn't it true that they put a filter on the lens? 】

[Your idea above is too high-tech, right? 】

[I really think this mussel purification device is very sci-fi. 】

This made all the villagers amazed, and decided to learn this to make a purifier to protect their own fishing grounds when they had time. As a photographer, Zhou Hao directly called the friend who managed the construction of the resort and asked him to come quickly. learning experience.

Li Chengxin also told the villagers very solemnly that although the mussels hanging on three sides of his experimental coast can eat a lot of algae, the toxins of the algae will accumulate in the mussels, so these mussels must not be used for food .

In order to find out whether there are toxic plankton in the red tide on the coast of Hongming Village, Li Chengxin called the plankton research professor who taught him for the first time after graduating from university.

The professor probably doesn't remember this student anymore, but even if he is not his student, this kind of request should be helpful.

The red tides are caused by phytoplankton, most of which are single-celled plants, among which dinoflagellates are the most, as well as diatoms, green algae, cyanobacteria, gold algae, etc. These phytoplankton are so small that they can be seen clearly with a microscope, but After being connected together, they can be caught.

Li Chengxin asked Brother Xiaoyong to borrow (steal) a pair of stockings from Lin Yiyi's room, and made a plankton fishing net by himself.

Cut off the large Coke bottle at 15cm, and cut off one leg and toes from the stockings.Pass the stockings through the mouth of the Coke bottle, turn it over and fasten the edge of the half Coke bottle, and fix it with a stapler.

Punch a hole in the lid of the film box, insert the top end of the stocking that comes out of the plastic bottle mouth into the lid of the film box, and then close the lid of the film box from the inside of the stocking to sandwich the mouth of the stocking.

Finally, a lead sinker is fixed below the film box to make the plankton fishing net easy to sink, and a traction sling is added to the edge of the Coke bottle.

In this way, the plankton fishing net sold for nearly 200 yuan on a certain treasure is ready.

Standing in the sea, Li Chengxin dragged a plankton fishing net around the surface of the sea and put it away. The silk stockings were covered with small seaweeds of various shapes, and they fell apart with a pinch.

He asked Brother Xiaoyong to smell it, and there was no smell, which meant that it was indeed the early stage of red tide.

Then Li Chengxin called the local fishery bureau and reported the red tide phenomenon near Hongming Village. The fishery bureau will probably send people to deal with it and prevent the red tide from spreading.

Finally, I carefully sealed the film box containing the single-cell plankton samples, went to Huazi to fill out the biological sample delivery form, and sent it to the university professor by courier.

While waiting for the Fisheries Bureau to come and spray the algae, Li Chengxin also received the algae report from the university professor.

The samples he sent contained a toxic plankton called Gymnodinium brevis, which, when attached to the gills of the fish, released reactive oxygen species (nitric oxide) that disrupted the fish's respiratory function.

The bay in Hongming Village is relatively closed, and there are no large-scale factories along the coast, so the number of red tide outbreaks is not many. After reporting to the Fisheries Bureau, even the people in charge of red tides in the Fisheries Bureau were a little skeptical.It has been many years since the last red tide broke out along the coast of Hongming Village, but the red tide was only late rather than absent, and it finally came.

A few days later, the sampling team from the Fisheries Bureau finally came to do the sampling analysis, only to find that Hong Ming Village had already produced a more professional sampling report.Immediately, a vigorous battle against the red tide began along the coast of Hongming Village.

In the end, the Bureau of Fisheries judged that the low-pressure storm some time ago sucked the organic matter in the seabed silt to the surface of the sea. Therefore, the red tide that occurred in this area is estimated to be the source and the hardest hit area, and it plans to start treatment from here.

Soon, the Marine Disaster Prevention and Control Division of the Fisheries Bureau came over. The employees were all wearing disposable plastic white coats, driving boats, carrying machinery and tools, and looked like a group of doctors.

The staff of the prevention and control department who came this time had heard from the sampling department about Li Chengxin's magical coast that was not affected by the red tide, and they came to visit one after another. Some people directly put an underwater camera to observe the situation in the water.

Zhou Hao naturally recorded and broadcast the images captured by the underwater camera in real time with the netizens who used to care about the red tide control in Hongming Village.

Of course, the staff of the prevention and control department were willing to give this face. They also knew that Li Chengxin was a member of the marine environment department, so they gave up two seats for them to watch the screen.

The screen shows the bottom of the hanging net for mussels. Each group of mussels is hung under the floating platform of 2 meters x 2 meters. Under the light red background, you can see the bottom of the floating platform, and there are actually small fish in it Swim around.

"This floating platform provides a hidden space for small fish, and the mussels that eat the algae can also prevent the small fish from being poisoned by the algae. This method is really amazing." A staff member sighed.

[I feel like I'm blind. They pointed at me for a long time and I didn't see any small fish anywhere. 】

【Didn't see...】

[But it sounds amazing...]

Li Chengxin did not live broadcast part of the red tide control later, because he was going to run his album promotion again, but many netizens still cared about the situation of red tide control here.

Lin Yiyi thanked the online netizens who were worried about the marine environment in their village, and also asked experts from the Fisheries Bureau and Li Chengxin, and then posted the basic countermeasures on Weibo.

At present, the most commonly used method to control red tides in China is to spray flocculants, such as clay, in areas where red tides occur, so that red tide algae can be condensed together and then sink to the bottom of the sea.At the same time, some chemicals, such as hydrogen peroxide, ozone, copper sulfate, etc., are used to clean up red tide algae.In addition, large-scale water pumps can be used to pump seawater up for continuous filtration to filter out seaweed.

At present, the most economical and environmentally friendly method is of course spraying flocculants, but this method can only be used after the red tide breaks out, because the flocculants are not purifying agents, and the clay is sprinkled once when the red tide comes, and all the seaweed cannot be disposed of at once. .In this way, it is best to wait until the red tide algae blooms and catch them all.

In addition, there is no better way to control red tides in the world now.

While waiting for the Fisheries Bureau to come, the villagers have already installed the biological water purifier "invented" by Li Chengxin in their fisheries.

If the Fisheries Bureau waited until the algae had fully bloomed to spray the flocculant according to the usual method, the villagers must have suffered a great loss, because by that time their farms would probably have been littered with dead bodies.

Fortunately, the villagers now have the biological water purifier "invented" by Li Chengxin. With the guarantee of this heavy mussel, they will go to the town to borrow a few oxygen generators and pour oxygen into their own fishing grounds. Maybe they can last until the red tide is controlled. complete.

(End of this chapter)