â–¡ Zhu Qinghong
With the popularization of the yellow mullet aquaculture, the market price and breeding efficiency of the Yellow River squid have been reduced. The grass carp, which ranks second in the four major fishes, has gradually come into sight. Although grass carp has the advantages of rapid growth, fine meat quality and low feed price, the disease-prone growth characteristics restrict the promotion of grass carp farming. With the promotion of new technologies such as immune prevention and control, biological agents, and ecological disease prevention, grass carp breeding has gradually been accepted by a large number of farmers. This article will explore two examples of fish breeding and discuss the suitable grass carp breeding model for the Yellow River Basin in our province.
Examples
A: The storehouse area of ​​Xishang Town, Mengzhou City is 2668 square meters (4 acres) with 2 sets of 3 kW impeller aerators and 1 bait feeder. On March 25, 2014, 1 599 kilograms of grass carp were fed at 135 grams and 2,500 kilograms of carp at 500 grams per tail. In the whole year, 5 tons of eel feed, 20 tons of grass carp, and a feed coefficient of 1.55 were sold. On September 25, 2014, the sale of fish was over, including 21,200 kilograms of grass carp, 11.2 yuan per kilogram; 8150 kilograms of carp, 11 yuan per kilogram, selling fish Total income is 225170 yuan. The total investment is 164,393 yuan, including feed 10,1500 yuan, fish species 52,393 yuan, staff wages and depreciation 5,000 yuan, electricity 3000 yuan, fish medicine 2,500 yuan, profit 60,771 yuan.
B: The pond area of ​​Liren Village, Geili District, Luoyang City is 3,335 square meters (5 acres). It is equipped with 3 sets of 3 kW impeller aerators and 1 feeder. On March 26, 2014, 115 kg of grass carp species and 515 kg of 172 kg of carp species were stocked per 115 g of grass carp. During the year, 18 tons of squid feed, 8 tons of grass and fish feed, and a feed conversion ratio of 1.44 were sold. On August 18, 2014, the sale of fish was over, including 10425 kg of grass carp, 11 yuan per kilogram; 3,600 kg of carp, 10.8 yuan per kg, sales of fish. A total of 147,993 yuan. The total investment is 103,112 yuan, of which feed is 75,500 yuan, fish is 17,112 yuan, staff salaries and depreciation are 5,000 yuan, electricity is 3,000 yuan, fish medicine is 2,500 yuan, profit is 44,881 yuan.
analysis
To sum up the above two examples of profitable breeding we can draw the following conclusions.
Take new technologies for immunization. Two farmers have adopted immunization techniques for fingerlings when they launch their grass carp to ensure that no major diseases occur during the cultivation of grass carp.
Appropriate sets of carp fingerlings. Using the difference in food habits and habits of grass carp, fully utilize the space and feed potential of the water body to ensure the maximum growth potential of the two main fish species.
Pay attention to water quality regulation. The two pools ensure that one aerator is running during the day and two minutes of well water is added every day to ensure that the water quality is “fat, live, tender, and coolâ€. During the whole growth stage, the fish feed normally, and there is no change of water and fish phenomenon.
Combine the number and proportion of varieties to be put in and adjust feed structure. Squid has high nutritional value and fast growth rate, but overfeeding will lead to increased mortality of grass carp due to long speed and too fast. We can feed some squid material appropriately before the outbreak of grass carp disease, at the peak of onset. Feed the grass carp with low nutritional value to achieve balanced growth.
Combine prevention and treatment of fish diseases to strengthen water disinfection. In the growing season, every 5 days or so, and every other day, every 7 days must be combined with water quality regulation to disinfect the pool water to ensure that the pond water is suitable for the growth of fish and to maximize the growth potential of the feed.
Combining with the actual growth of grass carp and the need of disease prevention, the fish should be fed with microecological preparations, and no internal chemical synthesis drugs should be fed as far as possible to ensure the growth of the dominant intestinal flora of grass carp and thus improve the feed absorption and utilization.
Timely sale. Once the adult fish reaches the commercial specifications, it will be sold in time, which not only can timely recover the breeding investment and reduce the risk of breeding, but also can reduce the consumption of the fish itself and prepare for the next production.
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