The function and use method of fish pond aerator

In rural areas, there are basically several fish ponds in every village. In recent years, many people have returned to their hometowns to start aquaculture, so these fish ponds are used. In fish ponds where fish are raised, one often sees a machine installed in the pond. This machine is an aerator. What is the use of installing an aerator in the fish pond? Why sometimes the aerator is turned on, and sometimes the aerator does not turn on for a long time? When is the better effect of the aerator? Today we will talk about this topic.

New entrants in aquaculture need to be cautious, and the aquaculture market may change next year!

In the past two years, crayfish farming has been so hot that it is about to be fried. People are everywhere looking for land to raise shrimps. It seems that what the laypersons are looking for is not just like money. Following this is the increasing land rent. In many major crayfish farming areas, the rent is more than 1,000 yuan per mu or even higher, which greatly increases the investment and risk of subsequent breeding costs. At present, whether working outside or successfully starting a business, people with some capital want to go home to raise crayfish and get involved in the crayfish farming industry to get a share of the crayfish. But is the actual situation as good as they thought? Is it possible to raise crayfish to make a lot of money and make money quickly? It may disappoint many people. The huge upfront capital investment and the long return period add The necessary breeding technology, experience, management and the huge risk of breeding make most people lose their money.

"Science and Technology" in Island Aquaculture

This breeding base is located on the Shengsi Islands. Shengsi Islands are located in the East China Sea. Nature has created this magical island in Shengsi. At present, it is a scenic spot in my country's archipelago, and an important production place for my country's main economic fish, and it has won the reputation of "natural fish bank". It is said that it is a "natural fish bank", of course, it is inseparable from the superior natural environment here. However, the development of aquaculture in Shengsi is actually inseparable from the support of technology. The use of modern aquaculture methods makes aquaculture full of science and technology. In this large yellow croaker breeding base, there are 10 breeding fish ponds. In June this year, the person in charge of the breeding base dropped hundreds of thousands of large yellow croaker and small yellow croaker fry. Let's take a look at what technological elements are there.

The first national aquaculture mechanization meeting was held in Changzhou

The surge aerator aerator floats on the sparkling water like a lifebuoy, and the splashes of the waterwheel-type variable frequency aerator form small fountains... This scene of a "water park" takes place in The observation site of the first national aquaculture mechanization meeting. This meeting was hosted by the Department of Agricultural Mechanization Management of the Ministry of Agriculture and Rural Affairs and was held in Jintan District, Changzhou City, Jiangsu Province recently. More than 200 people including Wang Jiayun, Deputy Director of the Department of Agricultural Mechanization Management of the Ministry of Agriculture and Rural Affairs, and relevant department heads, experts, scholars, and business representatives attend. Attracted nearly 40 companies across the country, more than 120 kinds of machinery and equipment to participate, is the most on-site demonstration of aquaculture mechanized enterprises and products in recent years. Participants came to the intelligent fishing ground in Zhiqian Town, Jintan District. "The core area of ​​the intelligent fishing ground has a planned construction area of ​​6,500 acres and a total investment of 500 million yuan. It is the core area for the establishment of the National Agricultural Science and Technology Park and the Jiangsu Agricultural High-tech Zone in Jintan District. It has been selected as a major project in Jiangsu Province in 2020." Jintan District Zhang Jinbiao, the deputy mayor of Zhiqian Town, said that a batch of advanced machinery such as automatic feeder, aerial megaphone, automatic lawn mower, automatic aerator, automatic water intake and drainage, and water quality online monitoring have been put into use in the fishery. The mechanization and intelligence of the main links of crab breeding. Jintan is the "Hometown of Chinese Eriocheir Crabs", and river crab is the first single-species industry in the area with an output value exceeding 1.5 billion yuan. However, the current labor shortage and rising labor costs have become a major problem restricting the development of the river crab industry. This area is the first to build an intelligent fishing ground in the country, which is a useful exploration to accelerate the mechanization of river crab production.

Do you really understand that the aerator is "three-way and two-way"?

"Three-opening" means that the aerator is opened at noon on a sunny day, the next morning on a cloudy day, and the continuous rainy midnight. "Two-off" means that the aerator is not to be used in the evening and at noon on a rainy day. Three open 1 Start at noon on a sunny day In the hot summer and autumn days, the stirring effect of the aerator can break the uneven vertical distribution of dissolved oxygen in the pond, convection the water in the upper and lower ponds, stir the large amount of supersaturated oxygen produced by the photosynthesis of the upper phytoplankton into the bottom layer, and promote the bottom organic matter Decompose to reduce or prevent the occurrence of fish floating heads in the early morning of the next day. Generally, it is better to start the machine for 1 to 3 hours at noon. 2Turn on the next morning on a cloudy day In cloudy days, the upper layer of the pond has poor light intensity, phytoplankton produces less oxygen, and the dissolved oxygen in the pond water is not high, but the oxygen consumption factor is relatively increased. In the early morning of the next day, the supply of dissolved oxygen was insufficient. At this time, the aeration and aeration functions of the aerator can be fully used when the machine is turned on, which accelerates the dissipation of oxygen-consuming gases in the water and directly increases oxygen to avoid low peaks of dissolved oxygen in the pool water. The startup time is about 3 to 5 hours in the early morning, and usually starts until sunrise. 3 Start at midnight on continuous rainy days Continuous rain, not only the photosynthesis of phytoplankton is weak, but also the wind is low, the pressure is low, and the oxygen consumption is high. Pond fish often float their heads in the middle of the night. Turning on at midnight can increase the dissolved oxygen to relieve the floating head. At this time, it will continue until sunrise after turning on. In addition, if there are many reasons such as water, fat and fish that may cause serious floating heads of the pond fish, it is necessary to start the machine before the floating heads to prevent the occurrence of "pan-pond" dead fish accidents. Inseparable 1No power on in the evening In the evening, the dissolved oxygen in the pond water is not too tight, and there is generally no need to start the machine. If it is turned on in the evening, it will not only have little effect, but will cause early convection and vertical mixing of the upper and lower water layers of the pond, increasing the oxygen-consuming water layer, forming oxygen debt, and even the dissolved oxygen in the water at dawn will reach a low peak, which will easily cause fish to float. Therefore, it is not suitable to boot in the evening. 2No power on at noon on rainy days Because of the lack of light on cloudy and rainy days, the thermal layer formation of the pool water is not obvious, and the photosynthesis of phytoplankton is weak, and the dissolved oxygen in the surface water layer is not supersaturated. Turning on at this time not only can not increase the dissolved oxygen of the lower water, but also reduces the oxygen-making function of the upper phytoplankton, increases the oxygen-consuming water layer of the pond, accelerates the oxygen consumption rate of the lower layer, and easily causes fish floating heads, so it starts at noon There is no point in stirring the water. This is the traditional "three openings and two non-opening", and the basis of judgment is also to control the start and stop of the aerator based on the diurnal variation of the dissolved oxygen in the still water pond. But how to judge the level of dissolved oxygen in the water? In the past, farmers relied on their own breeding experience. When to open aerators, how many aerators, and how long they were on, there was no scientific basis, so that the water Whether there is enough dissolved oxygen is also uncertain. Moreover, in order to ensure "sufficiency" of dissolved oxygen, the farmers have kept aeration opportunities running for a long time, which virtually increases the electricity bill. However, the author believes that as the breeding density continues to increase, the increase in the water will play a more important role in the water mixer. In addition to the "three open and two non-open", the aerator should also pay attention to the long startup time on hot days and increase its water supply. Layer exchange ability plays a role in cooling and promoting food, and the boot time is short on cool days. Long boot time at midnight, short boot time at noon Wind is small, the boot time is long, and the wind is big, the boot time is short. The pond has a large amount of fertilization and a long startup time. Less fertilization in the pond, short start-up time

Still using the aerator as a "life-saving machine"? You are out!

The aerator is a fishing machine for fish farming, it can be said that there is no aerator without fish. However, some people only turn on the aerator to increase oxygen when the fish is floating, and simply use the aerator as a "lifesaver." In fact, the aerator should not be used as a "life-saving machine", but as a "production-increasing machine". Why do you say that? You have to know that the abnormality of many indicators in the water is actually caused by insufficient oxygen. Why does the sub-salt exceed the standard? Excessive ammonia nitrogen? Excessive hydrogen sulfide? This is because the dissolved oxygen in the water is insufficient, and the residual bait, feces, and algae carcasses in the pond will be decomposed into these harmful substances. Before the fish floated, these harmful substances were already being produced. If you just use the aerator as a "life-saving machine", sooner or later, harmful substances will exceed the standard. At this time, turning on the aerator will not be of much use.