Four innovative Core techniques for Ecological Circulation Culture of Monopterus Albus Loach

The project of fish and vegetable symbiosis in soilless culture of Monopterus Albus is suitable for returning home to start a business and diversified economy. Mr. Zhou Wenzong, inventor of the project, associate researcher of the Institute of Biotechnology of Nanjing University, director of the Ecological Environment Research Center of Henan Academy of Sciences, and double doctor of ecological engineering and aquatic biology in the field of ecological aquaculture in China, has presided over 24 provincial projects, participated in the Tenth five-year Plan, the National Science and Technology Program, the 863 Program and 11 provincial projects, and holds 7 national invention patents as the first inventor. After years of scientific research and tackling key problems, it has realized the "top ten technological innovations", and in recent years it has broken through the traditional farming methods. Create four core technologies of scientific and technological innovation: "soilless culture of ricefield eel in still water in impervious membrane pond", "soilless culture of Loach in still water in impervious membrane pond", "overwintering and early sowing of eel in cage" and "symbiosis of fish and vegetables in Misgurnus anguillicaudatus pond". Patent Technology of Monopterus Albus Culture in still Water and soilless Water in impervious membrane Pond the technology of raising Monopterus Albus in thin film pond is the third generation invention technology of Dr. Zhou Wenzong after raising eel in net cage and cement pond. The dream of raising ricefield eel can also be realized in the water shortage areas in the north, and the abandoned land such as saline-alkali land can also be used. On December 2, 2009, the seven sets of CCTV Science and Technology Garden program reported this scientific and technological innovation under the title of "skillfully using thin film to raise ricefield eel". Compared with the traditional eel culture method in net cage and cement pool, the eel culture method in anti-leakage film soil pond has the following characteristics: a greenhouse is built on the film pool to solve the problems that cage culture cannot survive the winter and the water surface is difficult to manage, at the same time, compared with building a cement pool, the cost of building the pool is only half of that of the cement pool; a worker can complete the digging of the membrane pool, installation into the drainage outlet, membrane laying and other work in only one day. The impervious film is made of high quality polyethylene primary resin made by Italian automatic geotechnical production equipment through three-layer co-extrusion technology, which is produced according to American GRI standard and ASTM test standard, non-toxic, environmental protection and fast construction. Remarkable characteristics: high mechanical strength, good chemical stability, anti-plant root penetration, high anti-seepage coefficient, anti-aging, anti-ultraviolet, strong anti-decomposition can ensure the service life of the impervious film for eight years. The thin film eel pond is easy to observe, easy to domesticate and convenient to manage; the water exchange and desilting is complete, and the shelf life of the water body is long; the spraying liquid has no dead angle, and the disease prevention effect is good; the water temperature in winter is higher than that of the cement pool, which is beneficial to prolong the feeding period of rice field eel; the labor intensity of fishing operation is low; the pool wall is very smooth, will not cause eel body surface mucous membrane damage, can prevent the occurrence of fish disease. The land reclamation is the best, which is suitable for the development use of collective construction land after land transfer; the anti-seepage film has good plasticity and complementarity; the eel pond does not need to be dealkalized and disinfected.

Core technology 2, anti-seepage membrane pond still water soilless culture Loach patented technology traditional Loach culture, using open-air ponds with soil scattered culture, the yield per mu is only 200 to 300 kilograms, it is difficult to meet the market demand, and because of the smooth body of Loach, there is a habit of drilling into the soil, which brings greater difficulties to fishing, resulting in low recapture rate of Loach culture, which directly affects the yield and economic benefits of culture. The center's industrial film pond-cage organic combination of intensive still water soilless culture of Loach, prolonging the growth period of Loach, so that the year-round production can be achieved. It has the characteristics of high stocking density, flexible selection of water area in cage setting, high yield per unit area, convenient management, easy fishing, convenient overwintering and so on.

Core technology III. Patent technology of cage culture of Monopterus Albus overwintering and early planting routine release time of Monopterus Albus culture is usually concentrated from late June to the end of July each year (the temperature of releasing rice field eel is unstable, the breeding period is at its peak, and the survival rate is low). The situation that supply falls short of demand has led to a surge in seedling prices (18,25yuan / jin). However, if the seeds are released after August, the short culture time will affect the growth rate of Monopterus Albus. In recent years, Zhou Wenzong broke the convention and successfully developed and implemented the early sowing technology in his demonstration base. The successful practice of Dr. Zhou Wenzong in stocking "seedlings of another year" and artificial propagation has proved that temperature difference and breeding season are not the key factors restricting early sowing. As long as eel species are selected correctly and seedling quality is improved, it is feasible for rice field eel to be released in advance. By using the technique of planting seeds in advance, seeds can be planted all the year round (such as April, May, August, September, etc.). The seedlings purchased in April and May only cost more than ten yuan, which can be sold for more than 20 at the peak at the end of June, so why not fight for such a large profit margin? The cultivation cycle of Monopterus Albus was relatively prolonged and the weight gain multiple was increased by using the technology of sowing in advance, and the greenhouse built by overwintering combined with thin film pond not only solved the problem of overwintering, but also increased the economic income.

Core technology 4. The patent technology of "symbiosis of fish and vegetables" in Monopterus Albus Loach culture pond is a major discovery made by Dr. Zhou Wenzong in the field of ecological culture of eel and Loach. Monopterus Albus in ponds generally raise water hyacinth and water peanuts on the water surface. Although they have the function of regulating water quality, they have the problem of competing for space with eels. In the fish-vegetable symbiosis system of "aquatic vegetables-microorganisms-rice field eel and Loach" established by Zhou Wenzong, aquatic vegetables can absorb nitrogen, phosphorus and other nutrients released by fish metabolism in cultured water, remove 80% of suspended matter and 70% of organic matter in water, reduce biological oxygen consumption by 90% and 95%, and keep the PH value in water in the standard range. Aquatic vegetables can also disinfect the water body (the plant fungicides secreted by its roots can kill 90% of the pathogens), making the fish pond water self-repairing. The full-price compound feed configured in this fish-vegetable symbiosis system contains high-quality raw materials such as fish meal and bone meal, which happens to supplement the supply of trace elements. The vegetables successfully planted are hollow cabbage, water celery, lettuce and tomato. It not only increases the economic benefits, but also avoids the environmental pollution caused by the excessive growth of water hyacinth.