Technical communication

Use Raising fish in a bucket, he said, would work! New attempt of subgrade water pushing factory culture

Blackfish factory farming is initially feasible! "I want to build an ecological aquaculture model for blackfish, and I hope to accelerate the optimization and upgrading of the blackfish farming industry and create a new model of high-quality agricultural development through my attempt and exploration." This is the manager Huang of Zhongshan Company said in an interview with aquatic frontier.

First, quality control, food safety is the purpose

Reporter: ask you to give us specific introduction "land base push water factory" black fish breeding workshop current construction situation, finally build can achieve what kind of value?

Yellow manager: The experimental base of the "land-based water-pushing factory" black fish breeding workshop covers an area of about 80 mu, and the first phase of the project covers an area of 25 mu. The land-based water-pushing factory breeding workshop contains 20 food-grade PP board fish ponds with a diameter of 12 meters, and the water depth of each pond is 1.8 meters +0.3 meters with a cone bottom, and the effective breeding water body is about 200 cubic meters. At present, there are 6,500-19,600 raw fish lugs/ponds, and the daily feeding amount is about 1 ton. "I do this factory farming not for the sake of high yield, which can be compared with tutang farming, but for the controllable quality of black fish and the safety of food raw materials, which is my goal," said Huang. At the present stage, the company will upgrade the breeding base so as to achieve non-resistant breeding and standard tail water discharge, and bring the raw fish farming from 1.0 to 2.0 era. Next, the company will add intelligent construction, and promote the farming to 3.0 era in 3-5 years. The second phase of the base will be started later. We hope that through our experimental efforts, this model will eventually be promoted to the majority of aquaculture farmers, to cultivate the mass base, and to promote the healthy development of the snake-fish industry.

Second, quality makes the market

Reporter: Can you talk about building a such blackfish industry "land base push water factory" what is the initial heart of breeding workshop?

Mr. Huang: We can say that we are one of the earliest companies in the raw fish processing industry. We know the importance of food safety and understand the pain points in the industry. Generally, farmers do not strictly control food safety in the breeding process (especially during the period of drug metabolism), which is not conducive to the healthy development of the raw fish industry. The market demand is non - resistant, safe products, so there is a premium space. If the industry relies on poor quality and low price to do the market, it is easy to kill the blackfish industry. If the quality is not up to standard, the blackfish brand can not be built. Only through the quality of the market can we go further and healthier.

Now, traditional farming methods and processing plant is difficult to match, fisherman's song processing factory to the quality of fish, specification is higher, to create such a "factory land-based push water aquaculture workshop, the first is to adopt a healthy breeding mode, make the breeding snakehead meet food safety standards, the maximum guarantee quality and stable supply of fish; Secondly, the "land-based water-pushing factory culture mode" can realize the self-purification treatment of aquacultural tailwater, which meets the requirements of environmental protection. Thirdly, multi-regional culture facilitates the feeding of snakehead by classification and division. In addition to improving the survival rate of snakehead, it can also be cultivated according to the size and specifications of fish, which do not interfere with each other's foraging, so that all the fish in the same batch can meet the requirements of the processing plant. Fourth, the snakehead living in the water environment for a long time, the exercise intensity is larger, the meat quality of the snakehead is better, in line with the quality requirements of the processing plant for fish.

Three, "barrel" aquaculture snakehead definitely works

Reporter: It is reported that your set of "land based water push factory" breeding workshop from last October began to put into production, how is the current breeding situation?

Yellow manager: "Factory land-based push water aquaculture workshop starts running on October 17, 2020, had put the two specifications of the fish, a year in May, black sesame seed, put the size in 7 about two/stern, put a total of 10, the breeding at present average specifications at about 1.5 kg, black sesame seed, and the other one is July this year At the time of release, the average size is about 2.8 pairs/tail, and the current average is about half jin. Also, 10 breeding ponds have been placed, and the total number of fish in 20 breeding ponds is about 250,000. The overall operation is normal. After several months of trying, I can tell you for sure that it is possible to grow black fish in buckets, and that it is possible to grow fish as well as sprouts. Of course, we also suffered losses in the early stage, losing about 25% of the fish head, but we also found that the problem can be effectively solved.

Reporter: Can you give us an introduction to the whole "land based water push factory" breeding workshop system is how to operate?

Manager Huang: The company's "land-based water-pushing factory model" makes the aquaculture process free from the influence of the natural water environment. The total water body of the 20 culture buckets is about 4000 cubic meters. The bottom of the culture buckets adopts a conical design to facilitate the concentrated precipitation of fish feces. Four tail water treatment ponds are set around the culture area, which are sedimentation pond, filtration pond, purification pond and water storage pond, covering an area of about 20 mu. Carp and bakers, which mainly eat fish feces and plankton, are cultivated in the pond. At the same time, beneficial bacteria are cultivated every day to purify the water quality. The tail water of snakehead culture flows into the four fish ponds in turn through the pipeline for biological purification treatment.

Reporter: In the process of factory farming blackfish, have you encountered any difficulties? What are the key issues to pay attention to?

Manager Huang: This is an attempt to explore the factory farming of blackfish. We hope to explore this model clearly and achieve the purpose of solving the pain points of the industry, so as to do something practical in the industry. This year, we mainly focus on finding and solving problems. The problems we have found are as follows:

First of all, we have suffered losses in flight prevention, feeding methods, feeding quantity, oxygen supply, and drainage.

In addition, in the process of factory farming, water is the first key element, the current capacity has reached 100 kg/cubic the breeding water, daily feeding amount is controlled in a tonne of feed, feed process produces a large number of remnant dung, the easy to produce toxic or harmful substances, after soaking in water quality indexes such as ammonia nitrogen and nitrite high for a long time, It shows that the purification capacity of the whole water body is under pressure, which is an urgent problem to be solved. In addition, the data of the sewage absorption and purification capacity of the water body and the exchange rate of the water body need to be sorted out. In addition, the sedimentation tank also needs to be equipped with some omnivorous and filter-feeding varieties to feed on organic residues in water bodies. In the process of exploration, it was found that the removal ability of carp is stronger than that of dace, and the tolerance is stronger.

Secondly, at present, we have not completed the inner cycle, so we are far away from the goal that we need to achieve. In the future, we need to continue to explore. I hope that all sectors of society can participate in our platform, and the results can be shared.

Four, black fish market prospects will be better and better

Reporter: Ask you to talk about black fish this fish market prospect view?
Manager Huang: I think the market prospect of blackfish will be better and better. As the standardization industry becomes more and more mature, the fish will gradually make its way into ordinary people's homes, which will greatly expand the market capacity of snakehead. In addition, with the upgrade of consumption, it is expected that the next snakefish industry will have a big development; In the future, the proportion of black fish sold to processing plants will be higher and higher, the distribution of fish of different specifications will be clearer, and the realization of order farming will be accelerated.

Reporter: is there any plan on creating blackfish industrial chain in the future?

Manager Huang: 1. "Seed core project" is to rejuvenate and purify the parent fish; 2. Effectively solve food safety problems; 3, set up, intelligent breeding; 4. Discharge of aquaculture tail water to the standard; 5. Enrich the deep-processed products of snakehead and increase the added value through investment in scientific research.