I. Fish pond: Use a cement pond with a specification of 9.5 meters, 9.8 meters and 1.5 meters as a test tank, with oxygenation equipment and shade nets. Such as gravity drainage system has not been matched, can be aquaculture. Second, fingerlings were purchased. They purchased 3,000 stingray fingerlings, 140 tails/kg, with an average body length of 6.8 cm and an average body weight of 7.27 g. Individuals are uniform and physically strong. The average fish species is 32.2 tail/m2. Fish species should be sterilized with 3% saline for 5 to 10 minutes prior to stocking (note the fish response). Third, feeding and management: According to the feeding habits of the stingray, activity rules, feeding 2 times a day sooner or later. Feeds use compound feed, crude protein 38% -40%, hand feeding, feeding time of about 20 minutes. The daily feeding amount refers to the theoretical feeding rate table, and appropriate adjustments are made according to the feeding conditions of the stingrays and changes in the water temperature. During the rearing period, observe the activity and feeding of stingrays every morning and evening, measure the water temperature every day, determine the amount of water changed according to the water quality, and regularly measure body length and body weight. When the water temperature reaches 20°C or more, it is disinfected once a week with negative 60% of bromochlorohydantoin 0.310. During the whole cultivation period, except for a small number of deaths due to long-distance transportation in the initial period, very few deaths occurred in the middle and late stages. The final test survival rate reached 98%. 4. Result: After 185 days of feeding, the stingray output reached 229.6 kg, 2943 tails, and an average weight of 78 g. It produced 2.47 kg/m2 of adult fish (equivalent to 1642 kg of fish per mu), the bait coefficient was 1.54, and the survival rate was 98. %. V. Benefit Analysis: After accounting, removing costs, according to the wholesale price of stingray, the profit will be converted into 10,338 yuan per mu. 6. Summary: Stingray is one of the few high-efficiency varieties currently used in freshwater aquaculture. The cultivation of stingrays with cement tanks has significant advantages: First, it can give full play to the advantages of intensive farming, with small water bodies, high density and high yield per unit area; Second, water quality is easy to regulate and manage, and diseases are easy to find and control; It is high-input and high-output, with an average investment of 58.5 yuan per square meter, an output of 74 yuan, and an input-output ratio of 1:1.26, with a high rate of return. Fourth, the stingray breeding is technically easy to master. Promote large areas in areas where conditions permit. If you can achieve self-drainage, the output will be greatly improved.
Medical Pendant is new auxiliary medical equipment in operating room and ICU, with rotation function, which makes medical staff operate it easily. Different medical gas, strong or weak power, internet output terminal are integrated on it, damping device is configured to prevent drift, tray and drawer can put some medical devices. The ICU pendant is perfect medical gas, power and device platform work station for medical staff. Solid design and composite surfaces that can be cleaned with standard disinfectants completely eliminate contamination.
For more information about Operating Light, Operating Table, Hospital Bed and medical pendant please visit website.
Medical Pendant & ICU Bridge Pendant Medical Pendant,Icu Bridge Pendant,Surgical Pendant,Bridge Ceiling Pendant Shandong Mingtai Medical Equipment Group Co., Ltd , https://www.mingtaic.com
