First, pond conditions into a fish pond area is generally 5 acres - 8 acres, water depth is about 2 meters, pond mud 15 cm - 20 cm, injection and drainage is convenient; pool pH is 7 - 8.5, the growth season of water transparency in the pool 25 cm - 30 cm, equipped with a 3 kW aerator.
Second, the choice of fish species There are many varieties of carp, but the main carp should be based on silver carp, Pengze carp, Xiangyun carp, the three varieties have their own characteristics, farmers can choose according to the actual situation. No matter which breed you choose, you must pay attention to the purity of the quality of the fish. This is the key to obtaining high yields. Therefore, when buying fish species, better selection of fish species should be based on biological characteristics.
Third, stocking density 1. Cultivation of carp fingerlings. In general, 8000 to 12,000 tails of summer squid are stocked per acre of ponds, and the specifications can be raised to 50 g/tail--60 g/tail. It is worth noting that the density of summer flowering directly affects the breeding time and specifications of the fish species. If the density is too large, the size of the species will be too small. 2. Adult fish breeding. The average size of fingerlings is 50g/tail--60g/tail, with 1,500 tails-1800 tails per mu. Commercial fish size up to 350 grams / tail - 400 grams / tail. In addition, the specific stocking density also needs to be increased or decreased according to pond size, management status, and fish species specifications; based on years of experience, if more than 2,000 acres are placed, the vast majority of commercial squid specifications are below 300 grams/tail, seriously affecting commodities. The price of fish. In the market, the price of carp is directly proportional to the product specification, and the higher the specification, the higher the price. Generally 150g/tail - 200g/tail, priced at 7 yuan/kg - 8 yuan/kg; 200g/tail - 300g/tail, priced at 8 yuan/kg - 11 yuan/kg ; 350g / tail above the selling price of 12 yuan / kg or more. Therefore, the stocking density of fingerlings should be controlled between 1,500 and 1,800 tails per mu.
Fourth, the breed with the main carp carp ponds can be used with some carp, carp, carp, etc., but as far as possible not with fish such as carp, grass carp, etc., because carp, grass carp larger caliber, fast food, will seriously affect the gall bladder, Small-sized, slow-feeding squid feed on the squid and thus affect its feeding and growth. The proportion of carp and catfish should be about 10%, of which carp accounts for about 10% of carp, and some carp can also be put in place.
V. Feeding management
1. Domestication. In order to facilitate feeding and management and improve feed utilization, it is generally necessary to carry out domestication. When domesticating, attention should be paid to the following points: (1) Adding appropriate amount of attractant (for example, adding 50 mg of garlic per kilogram of feed) to the feed during domestication can be shortened. Domestication time increases the feeding area and quantity of carp, and at the same time can increase its resistance. 2 For domestication, fish with fast growth speed, short floating time, and feral feeding are forbidden. However, fish with a small caliber and similar feeding speed (such as boletegrass) can increase the success rate of domestication and shorten the acclimation time significantly. . 3 Domestication and stocking densities. In general, the density is high, the number of groups is large, and it is easy to acclimate. On the contrary, the percentage of long-term acclimation and low food intake is low. If the stocking density is determined, we can increase the density relatively by lowering the water level, which can facilitate domestication, increase the water temperature, and promote the rapid growth of carp. 4 Serving time of bream and bream. It should be 15 days to 20 days after the squid species are released after the main squid rises and eats up. 5 During the acclimation period, water quality should be kept “leanâ€, and the water quality that is too fat is not conducive to domestication.
2. Feed selection and delivery. 1 feed selection. Conditions can be based on the nutritional needs of eel self-prepared bait, commonly used formula: flour 10%, 25% of soybean cake, rapeseed cake 30%, 20% bran, barley 10%, corn 5%. Plus bone meal 1%, salt 0.5%. Unconditional available carp feed instead. 2 In the use of feed, the general specifications are 50 g / tail - 150 g / tail when feeding fish species, required particle size between 1.5 mm - 2.0 mm; specifications in 150 g / tail Feeding adult fish at -300 g/tail, particle size between 2.0 mm and 2.4 mm; size of fish feed at 300 g/over or above should be around 3.2 mm It is advisable to follow the principle of "small is not big" in the selection of the particle size of fish, which can effectively improve the utilization of feed. 3 feeding amount. The use of carp on feed is affected by various factors, the most critical of which is the influence of fish body size and water temperature. The relationship between the two and feed rate is shown in the table below: Relationship between feeding rate of catfish and water temperature and specifications Water temperature °C Feeding rate% Specification (grams/tail) ≤15 16—19 20—23 24—29 ≥30 50—100 100—200 210—300 310—350 350 11111 2.0 1. 8 1. 5 1.2 1.0 2.8 2.3 2.0 1.5 1.2 3.3 2.7 2.4 2.0 1.5 2.5 2.2 1.6 1.4 1.2 Baits Monthly distribution can refer to the following programs: April, 1%; May, 5%; June, 10%; July, 18%; August, 20%; September, 22%; October, 15%; November, 7%; December, 2%.
3. The general procedure of management. 1 Carefully patrol the pond. Stick to the three times morning, evening, and evening patrols, keep abreast of the changes in water quality and the fish’s feeding situation, and find that problems are solved in time. 2 Feeding. Feeding baits should adhere to the "four determinants" principle, that is, timing, fixed-point, qualitative, quantitative. The bait to be put is to be clean and sanitary, and it is forbidden to feed moldy food. And according to the "three look" (see the weather, see the color, see the fish feeding situation) to adjust the specific amount of feed in a timely manner. 3 water quality regulation. In order to promote the rapid growth of carp, the water quality should be maintained in a good state of production. Therefore, it is necessary to raise fresh water every 3 days - 5 days, especially in August - October. It is necessary to constantly add new water, always maintain the water quality "fat, live, tender and cool", and the transparency is controlled at 25 cm. --30 cm. 4 Correct use of aerator. The aerator has the functions of aeration, water stirring, and aeration, which can effectively prevent the deterioration of water quality. The aerator should be used properly according to the weather conditions. The principle of use should follow: “Open at noon on sunny days, open early in the morning on cloudy days, open in the middle of the night in a rainy sunny day, open in the evening on a sunny day, open in the rainy days, open early in the rainy season, and persist in the fish growing season. The principle of "opening every day" is to increase the dissolved oxygen in the pool water, prevent oxygen deficiency in the fish, and promote the rapid growth of the squid. 5 fish disease prevention and treatment. Although squids have strong resistance to various unfavorable factors, they must always prevent the occurrence of diseases. The prevention and treatment of fish diseases should adhere to the principle of "prevention from prevention and prevention from treatment." The fish species should be bathed with 3% to 4% saline before they are released. In the peak season of fish growth, lime per acre 15 kg -20 kg or 1 kg -2 kg of bleached powder water Quanchiposa after 10 days -15 days, in order to improve water quality, prevent the occurrence of disease. In the high-temperature season of July-September, medications are regularly administered to prevent the occurrence of intestinal diseases. Autumn is the outbreak season of parasitism. Therefore, in early September, Quanchiposa is generally carried out with 0.7ppm copper sulfate and ferrous sulfate mixture (5:2) or 0.2ppm-0.3ppm crystal trichlorfon. To prevent the occurrence of parasitic diseases.
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