Shrimp pool construction: Shrimp ponds should be selected near water sources, good water quality, abundant sources of feed, convenient transportation and power supply. Each shrimp pond area is suitable for 3-5 mu, water depth is about 1.5 meters, the pool is rectangular, east-west, slope ratio 1:2.5, the bottom of the pool is flat and slightly tilted to the side of the outlet, which is convenient for draining pool water, pool No leakage is required. The scale of construction of the shrimp ponds can be determined based on economic conditions, the number of shrimps raised, the level of feeding and management, and the natural conditions of the site. We must establish a sound intake and drainage system to ensure that floods and droughts are guaranteed. There is a certain amount of water in the pond, which is conducive to habitat hiding and shade, and can reduce mutual killing.
Prepare before stocking: First clear the shrimp pond disinfection. The newly-opened shrimp ponds must be exposed for 2-3 days before entering the water; the old shrimp ponds need to remove excessive silt, clean the pool, and check the leakage. The old and new shrimp ponds should be strictly sterilized and the wild fish and the enemy should be prevented from remaining in the pool. Followed by the water quality of accommodating fertilizer, 10-15 days after the clear pond, the medicinal property disappears and the water can be poured. At the same time, 70-80 kilograms of organic fertilizer is applied per acre to cultivate zooplankton. After 7-10 days, the water color turns deep, and there are a large number of plankton in the pool, and the shrimp species can be stocked.
Shrimp species stocking: The stocking density of shrimp species depends on the conditions of shrimp ponds, the technical basis and the per mu production plan required for adult shrimps. If it is planned to produce more than 75 kilograms per mu, then 0.8-10,000 prawns of 3-4 cm in size can be placed per mu, or 1.2 to 15,000 prawns of dilute shrimp can be planted; if the planned production is less than 75 kg per mu, per mu. Can put specifications 3-4 cm shrimp species 0.6-0.8 million, or put the desalination of 0.8-1 million shrimp seedlings.
Feeding of bait: Artificial feeding is the main method in pond-holding conditions. The main types of bait include snails, shellfish, clams, fresh fish and other animal foods, peanuts, wheat flour and other grain foods and chopped fresh vegetables. Food. As the requirements of Macrobrachium rosenbergii on bait are relatively high, the bait protein requirement for young juveniles is 35-40%, and that for bait shrimp is 25-30%. Therefore, it is advisable to formulate scientific food pellet feeds in places where conditions permit. The feeding of shrimp should be done in a qualitative, quantitative, fixed-point, and timed manner, and the daily feeding amount is equivalent to 5-7% of the shrimp body weight, but it should be determined according to the changes in shrimp body weight. The amount of feed in the morning accounts for 30% of the total daily amount of bait and 70% of the amount of bait in the morning.
Topdressing: In order to ensure the formation of natural food, it is necessary to regularly fertilize the fertilizer so that the water quality has a certain degree of fatness; generally every two weeks, pig manure is applied at a rate of 75-100 kg per mu, so that plankton breeding, supplementation of artificial feed is insufficient .
Concealed material settings: Macrobrachium rosenbergii undergoes multiple molting during its growth. Under normal circumstances, once every 7-10 days, the weight will also increase. Since freshly minced shrimps have a weak activity and are easily eaten by other hungry shrimps, some branches are planted in the shrimp ponds and some plants are planted as habitats for hiding, hiding and molting, which can effectively increase the survival rate.
Water quality management: Shrimps are better in shallow water in the early stage, and the water depth is generally about 70 cm. After 15 days of stocking, the shrimps are gradually added with new water. After 2 months, the pool water can be deepened to 1.5 meters. If shrimp activity is found to be dull and the food intake is small, fresh water should be added to the pool in time to prevent death caused by lack of oxygen.
Second, pond polyculture of shrimp and fish this model is divided into Macrobrachium rosenbergii and adult polyculture and Macrobrachium rosenbergii and mixed species of fish in two common forms, the average yield of 50-75 kg of shrimp per mu, 100-200 kg of fish production.
Pond selection: Mixed with adult fish, shrimp species specifications 3-4 cm, stocking density 2000-4000 per acre, first put the species, after the shrimp species. Mixed with the fish species, first put the shrimp species, shrimp stocking density of 6000-8000, until the young shrimp to adapt to the new pond environment and then stocking fish species, in order to improve the survival rate of shrimp species.
Feeding and management: The method can be performed with reference to the method of raising Macrobrachium rosenbergii. The feed should be fed before feeding the fish's bait. When fish diseases need to be treated, full consideration should be given to the shrimp's tolerance to drugs. In terms of water quality management, shrimp should also be considered for the characteristics of high requirements for dissolving and itchiness. Frequently adding new water or changing water, controlling the pool water and fatness, and ensuring the need for dissolution and itchiness.
1. The single-cultivation of ponds with single-cultivation ponds is currently using more models of shrimp farming, and the high technical requirements for high-yield per mu are also high. The main technical measures are: