Calyx, also known as Sabina, is a major species of marine aquaculture. Through artificial domestication, it grows quickly in freshwater, has fewer diseases, and has high yields. Its meat quality is superior to that of California alfalfa. Here are the technical highlights of calyx cultured in ponds:
First, pond conditions. The pond area is suitable for about 2-8 mu, water depth is 15-2 meters, there is less silt at the bottom of the pond, the water source is sufficient, and the water quality is clean and pollution-free. The method of pond clearing is the same as conventional fish farming.
Second, the desalination and cultivation of summer flowers. The summer flowers purchased from the coast should be placed on the pond of Macrobrachium praecox to be desalted. The salinity of the pool water should be the same as the salinity of the seed production area, then 1/3 of the pool water should be pumped out every day, and the same amount of fresh water should be added later. Pay attention to inflation and increase the amount of oxygen. At the same time, feed a suitable amount of fresh fish gizzard every day. Dilute the time by 7 days and gradually fade. In order to improve the survival rate of summer flowers in flower buds, we must timely dilute the summer flowers in a small pond of 05-1 acres or use a dense mesh to surround a pond with a pond area of ​​about 10-20% in the corner of the culture pond. The stocking capacity is about 1,000 stocks per acre of adult fish breeding ponds. Attention should be paid to the use of artificial flowers, artificial feeding, and bait-feeding to gradually feed the fish. The fish should be fed, and fresh fish should be fed after 20 days. Feeding 2 times a day, when baiting, use tools to beat the water surface to attract the attention of the fry, and then feed the bait with water. Spread it evenly to make it full. After the flower buds grow up and their activity ability is strong, they can be fed at fixed points, and the daily feeding amount is 8% to 10% of the fish's body weight. Due to the high density during the cultivation of fingerlings, attention should be paid to the observation of changes in water quality, and new water should be added in time to prevent oxygen deprivation and deterioration of water quality. Use nets to raise the net to clean the net frequently to facilitate water exchange. Water disinfection was performed once every 7 days with Wan Xiao Ling 02 mg/L. It was found that parasitoids such as parasitized worms were infested and treated with cupric sulfate and ferrous sulfate. Summer flowers are cultivated for about 1 month. They usually grow to more than 9 centimeters long and can be transferred to adult fish culture.
Third, adult fish breeding. Put the fish species in the cultivation pond into the fish breeding pond or remove the nets and transfer them into the whole pond for breeding. At the same time, 50 grams of white quail about 250 grams/tail is used per pond to improve the water quality of the pond. The main feed for adult fish farming is fresh wild fish and frozen seafood. Flowers are fierce and they kill each other when there is not enough food, so it is extremely important to provide fresh, palatable, and adequate baits. When the fingerlings are put into a fish pond, the feeding range should be wide, so that they have more chances of feeding, and they can be fed regularly at a regular timing. Fixed-point: 1-2 small ponds, 3-4 ponds; timing: feeding 2-3 times a day, time 7-8 am, 4-5 pm, or 7-8 am, 2 pm, 4 pm - At 5 o'clock, the feeding amount is 40%, 60%, or 30%, 20%, and 50% of the daily dose, respectively; Quantitative: The daily dose is 6-12% of the calyx weight, and after 3 months, it is 3%. . When feeding, use the method of splashing the water when the seed is cultivated to form a conditioned reflex, and when it is heard, it will be fed. To cast feed, start less throwing, when the fish fight for food faster throw more than vote, when the fish eat fast turn slow cast less investment, the whole process takes about 20-30 minutes. Fourth, daily management. Calyx culture requires clear water, dissolved oxygen is more than 4 mg/l, and the transparency is about 40 cm. Therefore, it is necessary to do a good job of regulating the quality of water, and constantly change the water, especially in the hot season, but also to fill the pool water. In addition, the adult fish should be regularly disinfected with calcine water to improve water quality. It is also necessary to avoid the propagation of blue-green algae in the pond and affect the meat quality of flowering mackerel. Anti-fish disease, a splash of Wan Xiaoling (02 mg/l) per month. Occurrence of parasites, can be crystal trichlorfon or copper sulfate Quanchiposa, bacterial disease with Wan Xiao Ling 03-05 mg / l Quanchiposa.
Surfactants, known as "industrial monosodium glutamate", refer to substances with fixed hydrophilic and lipophilic groups, which can be aligned on the surface of the solution and make the surface tension decrease significantly. Surfactants are generally organic amphoteric molecules with hydrophilic and hydrophobic groups, which are soluble in organic and aqueous solutions. Hydrophilic groups are often polar groups, such as carboxylic acid, sulfonic acid, sulfuric acid, amino or amino groups and their salts, but also hydroxyl, amide, ether bonds; hydrophobic groups are often non-polar hydrocarbon chains, such as hydrocarbon chains with more than eight carbon atoms. Surfactants are classified into anionic surfactants (mainly soaps, sulfates, sulfonates), cationic surfactants (also known as quaternary amines), amphoteric surfactants and non-ionic surfactants (mainly including fatty acid sorbitans, polysorbates, polyoxyethylene fatty acid esters) Polyoxyethylene fatty acid ether, etc.)
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