Before the shrimp is put in, it must be “tested†to confirm that the toxicity of the drug in Qingtang has completely disappeared before it can be stocked.
Fourth, juvenile prawns Stocking of prawns in shrimp ponds can be calculated using the following formula.
Juvenile stocking amount (tail) = shrimp pond area (mu) planned mu yield (kg) expected discharge specification (tail/kg)/predicted survival rate (%)
Among them, the planned yield per mu is based on the per mu output achieved in previous years. Combined with the current farming conditions and the measures taken, the per mu output expected to be achieved is generally 200-250 kg; the expected survival rate is generally 55%-65%. Calculation; expected out of spec, according to market requirements, is generally 12-14 tail / kg; calculated data may be an integer stocking.
Due to the high price of red crayfish larvae, in order to increase the survival rate and the size of commercial food prawn, and to reduce the cost of seed, the stocking capacity of mulberry can be reduced to 4000-5000.
The precautions for juvenile shrimp rearing are basically the same as those for broodstock. The same shrimp ponds must be stocked with juvenile shrimp of a neat size, and have to put them in at once. The shrimp ponds can be used with appropriate amount of scorpion and squid species, which is beneficial for regulating water quality and controlling the biomass of large zooplankton.
V. Feeding management
1. Water quality management During the rearing period, suitable water levels (about 0.8 meters in the early stage and 1.0-1.5 meters in the middle and later stages) must be maintained. According to the water color and transparency in time water, change the water. During the breeding period, the whole pool of photosynthetic bacteria concentrated bacteria was splashed once a month at a concentration of 210-4%-510-4%. In the summer and hot season, when the water temperature exceeds 32°C, the number of water changes should be increased and the water temperature should be lowered. During the rearing period, quicklime and phosphate fertilizers should also be applied according to the PH value of the pool water and the contents of calcium and phosphorus. The amount per mu is: 10-20 kg of quicklime; 5-10 kg of superphosphate. Lime and phosphate fertilizers cannot be mixed, and they all need to be dewatered before they can be spilled in Quanchipia.
2. Feeding and fertilizing Feed types mainly include compound feed of red-claw crayfish (or prawns and Macrobrachium rosenbergii) larvae and adult shrimp, and animal feeds (such as frozen or cooked clams, clams, fishes, etc.) Shrimp, large snails, river clams, minced meat, etc.), aquatic or terrestrial green fodder, and fresh cow dung, which contains more organic debris. Expired and deteriorating feeds should be disabled. 0.3-0.5% photosynthetic bacteria concentrated bacteria solution can be added in the compound feed.
Feeding should be done with “four look†(see the season, see the weather, see the water color, see the feeding situation of the shrimp) and “four settings†(definite person, qualitative, quantitative, regular), and achieve uniform, sufficient, and excellent , Reasonable and palatable, so that all pool crawfish can eat and eat in time. In the early period of juvenile rearing, the juveniles were still very small, and their crawling ability was also very poor. The feed should be sprinkled evenly along the edge of the pool, and they should be thrown into the shoals around the shrimp ponds at a time. Set a feeding point every 1-2 meters and set appropriate amount. 0.6-0.8 square meters of "monitoring food table." Feeding times are usually 2 times a day, 8:00-9:00 a.m., 30% of the total daily feed volume, and 70% from 6:00-7:00 p.m. The daily feeding rate is negatively correlated with the size of the shrimp, which is generally 2-8%. Daily feeding should be based on the shrimp's feeding situation. Generally, the feed on the “monitoring food table†will be consumed within 2-3 hours after feeding.
In order to proliferate natural food organisms in the pond, topdressing should be applied in a timely manner according to the color and transparency of shrimp ponds. The types of fertilizers are organic fertilizers with sufficient fertility and long fertilizer effects. The transparency of the shrimp pond is preferably 30-40 cm, and the water color is yellowish green or light brown.
3. Management of aquatic plants According to the growth and appearance of water leeks, quick-acting fertilizers can be splashed in the floating area in time. Fertilizer concentration should not be too large, so as not to cause damage. When the water leeks are as high as 25-30cm, they must be harvested in time, and about 5cm must be left when harvesting. If other aquatic plants are to be planted, suitable areas and densities should also be maintained.
4. The daily management of the shrimp ponds must be managed by special personnel and stick to the ponds 3-4 times a day. In the early morning and evening patrol, it is necessary to carefully observe the changes in water quality and shrimp, fish activities and feeding conditions, and determine the feeding, fertilization, water injection and aeration for the day and the next day. Pay attention to the environmental sanitation of the shrimp ponds and the intake and drainage systems, and strengthen the prevention and control of pests and diseases (fixed ciliate diseases, cut-head disease and bacterial enteritis, etc.), and find problems in a timely manner. Anti-escape, anti-stealing, and prevention of pool water being contaminated by foreign substances, and lack of oxygen, water leak prevention, and keeping records of feeding management, must also be done well.
6. Harvesting and transportation The growth rate of C. spinosa during inbreeding is inconsistent, and the individual size is very uneven. Therefore, it is necessary to use a fixed fishing gear for catching at the late stage of rearing, catch large and small, and weigh more than 70 g (50 g). The above-mentioned items, which are also available for sale, but have a lower price, are gradually caught in the food shrimps. By October-November, when the water temperature has dropped to 10°C-12°C, red snapjacks have seldom ingested food and their activities have been significantly reduced. At this time, all the aquatic plants, horizontal nets, artificial shrimp nests, and “monitoring food tables†in the pool can be taken out. Then, the shrimps are pulled to pull the net several times to catch most shrimps and fish, and finally the pool water is taken. Drain and kill all shrimp and fish. The method of transporting commercial food shrimp is basically the same as that of broodstock, but the shipping density can be increased to 200-300 containers per carton.
Intravenous simply means "within vein" (or "inside the vein"). Therapies administered intravenously are often included in the designation of specialty drugs. Intravenous infusions are commonly referred to as drips because many systems of administration employ a drip chamber, which prevents air from entering the blood stream (air embolism), and allows an estimation of flow rate.
Intravenous therapy may be used to correct electrolyte imbalances, to deliver medications, for blood transfusion or as fluid replacement to correct, for example, dehydration. Intravenous therapy can also be used for chemotherapy.
Compared with other routes of administration, the intravenous route is the fastest way to deliver fluids and medications throughout the body. The bioavailability of the medication is 100% in IV therapy.
Intravenous infusions are fluid solutions administered through a vein. There are numerous different types of solutions available, but they can be broken down into simple categories depending on the function they serve. Some replace lost fluids, and others provide nutrients, replace lost blood, and deliver medications.
One of the most common uses for intravenous infusions is to replenish fluids lost through dehydration. These infusions often contain normal saline solution, a combination of sterile water and sodium chloride. This solution is known as an isotonic crystalloid, or a solution that contains the same amount of electrolytes as plasma in the body. It is used in cases of moderate to severe dehydration, such as that caused by vomiting or diarrhea, when replacing the fluids quickly is vital.
When a patient`s gastrointestinal tract is compromised and nutrients cannot be absorbed - or eating can worsen the condition - intravenous infusions called total parenteral nutrition may be given. These solutions contain a mix of sterile water, electrolytes, sugar, proteins, fats, and other nutrients, depending on the needs of the patient. Diseases and disorders that commonly require total parenteral nutrition include late stages of Crohn`s disease, obstructive bowel disorder, and ulcerative colitis.
Intravenous infusions are also used to deliver medication directly to the blood stream. Certain medications, such as intravenous immunoglobulin, a type of antibody, can only be given through the vein. Other medications, such as certain narcotic pain relievers, are given intravenously because the method allows them to they work faster than when taken orally. Chemotherapy for treatment of cancer is also typically given intravenously.
When performed by a medical professional, intravenous infusions are typically safe. The most common reaction is mild pain and redness at the site of the injection, although different medications may cause different side effects. Any time the skin is punctured, there is a risk of infection. Having a medical professional, typically a nurse, monitor the Intravenous Infusion and change the injection site when irritation is evident can help prevent complications.
IV Infusion
IV Infusion, Glucose IV Infusion,Intravenous Infusion
NOUVASANT PHARMhealth LTD. , http://www.nouvasant.com