Basha fish is a freshwater fish that is a specialty of Southeast Asia. The fish protein is rich in ingredients, high in nutritional value, delicate in flesh, delicious in taste, rapid in growth, and high in population yield. The seedlings of that year can be raised up to 500-800 g per year, and the largest individual Up to 15 kilograms, loved by farmers and consumers. It is very popular in the international market. It is a kind of high-grade economic fish. It is known in Vietnam as “home-baked Basha, life is not bad” and became Vietnam. The main export product of foreign exchange. Because the living habits of Basha fish and its requirements on the ecological environment are consistent with the climate in the south of China, and there are a wide range of feed sources, a few places in China have been introduced as ornamental fish in recent years. The Fisheries Bureau of Yingshan County of Hubei Province has introduced Baasa fish from Vietnam through the Provincial Fisheries Science Research Institute and has successfully exploited the unique local geothermal resources for breeding and breeding. In order to further promote the large-scale breeding of Basha fish, this Vietnamese fish has achieved greater economic benefits in China, and its farming methods are briefly described as follows:

1. Pond conditions Baxa is a tropical fish, the water temperature is very strict requirements, the appropriate water temperature is 22 ~ 32 °C, the optimum water temperature 24 ~ 30 °C, with the decline in water temperature growth more slowly, when the water temperature dropped to 16 °C , Stop eating, if the water temperature is below 10°C, it will freeze or even die. If the use of earthen ponds for breeding Basha fish, because of the close proximity of its physical and chemical factors to the natural environment, the growth rate of Basha fish can be greatly improved. Therefore, an earth pond with sufficient cold and hot water sources, no pollution, moderate water and fat, and convenient drainage and irrigation should be selected as aquaculture ponds with an area of ​​1,300 to 2,000 square meters, a water depth of 2 meters or more, a slightly alkaline water quality, and a transparency of 35 cm or more. .

2. Fry breeding Under natural conditions, most of the Basha fish are naturally spawned upstream of the river, but it is difficult to achieve sexual maturity under artificial rearing conditions, which brings many technical difficulties to the artificial reproduction of the fish. The male fish is generally mature at 4 years of age and can extrude semen. It takes more than 5 years for mature females to mature. Eggs are sticky eggs and fertilized in vitro. In natural conditions, Basha fish is a one-time spawning type in one year, and the amount of eggs depends on the weight of the fish and the condition of the nutritional development. In recent years, Yingshan County Aquatic Products Bureau's technology promotion station under the guidance of experts from Hubei Water Science Institute has conducted extensive research and practice on the fish's living habits, ecological environment, reproductive physiology, fat metabolism and artificial reproduction. The use of local high-quality geothermal resources successfully carried out artificial breeding of Basha fish, and solved key technologies such as oxytocin production, artificial insemination, emergence and aquaculture, which laid the foundation for the development of the fish.

3. Seed stocking

(1) Clear pond disinfection. Before stocking, the depth of water per 667 square meters of water is 20 centimeters. Sprinkle the entire pool with 100 kg of quick lime. After about 7 days, pour the pool water to 60 centimeters or more and prepare to put the fish.

(2) Fermentation pond. The seedlings were planted with 150 kg of organic fertilizer per 667 square meters in front of the pond and 3 kg of soybean milk per 667 square meters. When a large number of zooplankton, cladocera, and copepods appeared in pond water, The seedlings were planted, and the water level of the pool water was gradually increased to about 1.5 meters, and organic fertilizer was applied.

(3) Stocking density. The stocking density has a direct impact on the growth rate and out-of-pool size of the Basha fish. The stocking quantity should be determined according to the fish species specifications, quality feed sources, pond ecological conditions, management level, and market conditions. If the pond water supply is sufficient, it can be stocked every 667 square meters. 3.3 centimeters seedlings 5000, while 50 to 80 tails per 667 square meters.

(4) Stocking requirements. Although the requirement for dissolved oxygen in water is not high, the methods and techniques for stocking seedlings must also be emphasized. First introduced the requirements of pure, neat specifications, disease-free and injury-free, strong physique. Secondly, Basha fish should be cultivated monoculture. For polyculture, it should be mixed with filter-feeding, herbivorous fish, and it must not be polycultured with omnivorous fish. Finally, the fish body should be sterilized when the seedlings are released, and 3% salt can be used for 3 to 5 minutes, or potassium permanganate solution for 15 to 20 minutes. At the same time, attention should be paid to temperature-lowering ponds, and seedlings in the low-temperature period should be susceptible to hydromycosis.

4. The daily management of feeding and management should be done in the "four fields": diligent pond, diligent observation, diligent feeding, and prevention of disease. In the specific feeding and management, the following aspects should be done:

(1) feed feeding. In the breeding stage, the pre-feed should be mainly animal feed. In the middle and later stages, full-priced pellet feed should be put. The content of crude protein in the feed should reach 35% to 50%, and all kinds of nutrients must be balanced, especially in animals. The content of protein should be sufficient. Feeding the fish 24 hours after entering the pool, 2 times a day, 9 to 10 a.m., 4 to 5 p.m. one time each, feeding 50% of the fish carp and peanut cake, and stirring them by 10% to 15 of the fish's body weight. For feeding, it is also possible to use seedling compound feed in combination with silkworms, first fed for one month and then fed with compound feed. In the adult fish breeding stage, whole grain feeds with crude protein content of more than 30% can be fed, and the feed rate is 5%, which is divided into three feedings of early, middle and late dates. Due to the small diameter of Basha fish, attention should be paid to the choice of feed pellet size. During the specific feeding process, a random inspection shall be conducted every two weeks to adjust the feeding time and method of feedstuffs in combination with the growth and feeding conditions of Basha fish.

(2) Water quality regulation. With the increase of fish body and the increase of feeding amount, fish excreta and residual bait deposition exceed the self-purification capacity of the water body and cause water quality deterioration. At this time, water quality should be adjusted in time according to the actual situation. Generally change the water every half a month, change the amount of water should not exceed 1/3 of the pool, and pay attention to the temperature difference should not exceed 2 °C. Since the basa fish like to live in a calm water body and is accustomed to moving up and down vertically, the water body should be deeper and should not be changed frequently or in large quantities. In ponds where Baasa fish grows, aquatic plants should not be covered by water. Since Basha fish can also survive in brackish water, it requires slightly alkaline water quality, and acidic water can easily cause its disease. Therefore, the pH value of the water should be raised in a timely manner, and it can be adjusted by spraying shell ash in the pond or dropping the feces of fermented livestock and poultry.

(3) Disease prevention and control. Sarcoidosis, anchorage leeches, white spot disease, rickets, and trichoderma are common causes of Basha fish. Basa fish disease should be mainly prevention. Once the bacteria invade, it is extremely difficult to cure. Specific prevention methods are: First, keep the pool water temperature between 24 ~ 30 °C; Second, each half a month with lime or bleach Quanchiposa; Third, timely adjustment of water quality, often cleaning the food table, remove residual bait dirt; Fourth, Insist on feeding fresh baits and regularly add drugs to prevent diseases in the bait; Fifth, create a good environment, keep the pool wall smooth, no debris in the pool, careful operation in production, so as to avoid improper operation of the fish to induce disease. In rainy, hot or cold weather, care should be taken to supervise and watch the ponds day and night. Problems should be found in a timely manner. In the event of disease, timely professional and technical personnel to diagnose and treat. Drugs commonly used for prevention and treatment include salt, quicklime, potassium permanganate, hydromyxin and trichlorfon and other antibacterial agents and insecticides.

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