Red prawn has strong adaptability, large individuals and fast growth. It resembles lobsters, has delicious meat, and has simple farming techniques and high economic value. The shrimp is generally produced at a rate of 100-200 kg per 1-15 hectares (1 mu) and can be up to 402 kg. Price per kilogram is 40-60 yuan.
The pond cultivation techniques are now described as follows:
First, biological characteristics
The shrimp is a tropical shrimp with a water temperature of 6-37°C, an optimal water temperature of 22-32°C, and a suitable pH value of 6-8. Dissolved oxygen above 4 mg/l. Fear of strong light, hi light, and frequent night activities. Is omnivorous shrimps, which are similar in the lack of food. Feeding with bait under captive feeding conditions. The growth rate of shrimp is affected by environmental conditions, especially food and water temperature. The food is rich, the water temperature is suitable, the growth rate is fast, and vice versa.
Second, pond preparation
Shrimp ponds require a quiet environment, plenty of water, and convenient drainage and irrigation. Each pond has an area of ​​0.07-0.33 hectares (1-5 acres) and a water depth of 1-1.2 meters. The bottom of the pool is flat, with less silt, sandy, and certain shallow water areas. The pool is a gentle slope. More than 1/3 of the pond's water surface is planted with aquatic plants such as black-leaf algae and water peanuts. Piles of rubble or used tires are piled around the pond to provide artificial nests for the shrimp. Around the pond, a 30-50 cm high guard wall was built.
Third, seed stocking
For ponds that have been used for many years, excessive silt should be removed, drainage channels must be dredged, and dams should be reinforced. Before putting shrimp, use the same method as fish farming to disinfect. In dry ponds, 150-200 kilograms of quick lime are applied per 1/15 hectares to sprinkle the hydrated pulp and the hot Kyung Quan. After 7 days of disinfection, the drug properties disappeared, and 100-300 kg of fermented manure, such as cow dung and chicken dung, was applied every 1/15 ha. At the same time as applying fertilizer, fill the pool with water 30-50 cm deep and add water to 80 cm deep after 5 days. When water is injected, it must be filtered with a dense mesh. Aquatic plants must be temporarily stored and sterilized before they are cultivated to prevent the entry of wild fish eggs and harmful organisms. Shrimp seedlings (species) are generally stocked in mid-to-late May, when the water temperature is stable above 18°C. Care should be taken to select sunny weather. Sun exposure should be avoided during transportation. Should choose physical health, no injuries, consistent specifications of the seed.
IV. Preparation before restocking
Before stocking, the temperature difference between the wintering ground and the shrimp pond should be within 3°C, and the shrimp seedlings should be disinfected with a bleaching powder solution having a concentration of 1 mg/kg. Seed stocking density can be determined according to pond conditions, seed specifications, technical level, etc. as appropriate. In general, the early-community bacteria were 3-5 cm long and weighed 1.5 grams/tail. Each 1/15 hectare could have 3000-5000 tails. The survival rate could reach 60%, and it could be up to 50-100 grams in October. tail. Overwintering shrimp species have a body weight of 10-15 g/tail and can stock 2000-3000 fishes per 1/15 ha. The survival rate is 80%. The shrimps grown in the past can reach a size of 100 g/head or more. The pool can also be used with a certain number of flowers and white fish. Generally, 150-200 kg can be produced per 1/15 hectares, and seedlings should be uniformly distributed around the pond.
Fifth, scientific feeding
Under artificial breeding conditions, artificially supplemented pellet feeds should be fed, and fish, shrimp, grains, and vegetables should be appropriately matched. In the early stage of laying, the protein content of bait should be 30%-35% and the particle size should be 0.5-0.6mm. In the middle and late stages of development, the dietary protein content is 25%-30% and the particle size is 2-3 mm. In the shallow water area around the pond, there are multiple feeding areas. The amount of daily feeding can be gradually reduced with the growth of the shrimp, and the amount of the feed is 3%-5% of the total weight of the shrimp. Generally, the feeding amount is 3 times daily, and the time is 6-7 am, 4-6 pm, 9 pm Time. Since the shrimp likes to feed at night, the night feeding amount should account for about 70% of the total feeding amount. In ponds with many plants and biomass, the feeding amount should be appropriately reduced, and the feeding amount should also be based on the weather and water quality. The situation of shrimp and other activities increase or decrease as appropriate. Since the shrimp likes a variety of foods and does not like to eat a feed for a long time, it should be fed 2-3 times a week, such as vegetables and small fish shrimp.
Sixth, water quality regulation
Pool water should always be kept cool and high in dissolved oxygen. The new water will be flushed once every 15-20 days, and the shrimp leftovers and residual baits will be fished out in time. Sprinkle lime once a month and use 15-20 kg per 1/15 ha (1 mu). The shallow water level is maintained at the beginning of the stocking, and the water is gradually added to the highest level as the shrimp grows. In hot season, when the water temperature exceeds 32°C, new water should be flushed and shades should be increased.
Seven, watch the pond observation
In the morning and evening, each patrol pond is once. During the middle and late breeding period, when the water quality changes into fat and sudden changes in the weather, the oxygen should be turned on in time to prevent floating head dead shrimp. During the rainy season, the firmness of the escape prevention wall should be checked at any time to prevent the shrimp from escaping. The culture environment should be kept quiet and can't be caught by nets without special circumstances, so as to reduce the damage to the clam shellfish.
During the aquaculture process, large catches can be caught and the shrimps can be listed on the market. Generally around mid-October, the water temperature drops to 12-15°C, and the shrimp can be harvested and marketed when they stop feeding.
China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer
Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.bodybuildingoil.com