One, pond single raising
The pond single-cultivation is currently adopting more shrimp farming modes, and the high production per mu also has high technical requirements. The main technical measures are:
1. Construction of Shrimp Pond: Shrimp ponds should be located near water sources, with good water quality, abundant sources of feed, and convenient transportation and power supply. Each shrimp pond area is suitable for 3-5 acres, water depth is about 1.5 meters, the pond 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, to facilitate drain 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.
2. Preparations before stocking: First, clear the disinfection of shrimp ponds. The newly opened shrimp ponds must be exposed to water after 2-3 days of exposure; the old shrimp ponds need to remove excessive silt, and pool the slope of the pool to check for 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 the accompany fertilizer, after 10-15 days after the clear pond, the medicinal property disappears and the water can enter. 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 a large number of plankton appear in the pool, and the shrimp species can be stocked.
3. Stocking of shrimp species: The stocking density of shrimp species depends on the condition of the shrimp pond, the technical basis it has, and the per mu production plan required for the adult shrimp. If you plan to produce more than 75 kilograms per mu, you can put the size 3 per acre
4 to 8 centimeters of shrimp species 0,800 to 110,000, or 1.2 to 15,000 tails of desalinated shrimp seedlings; if the planned yield per mu is less than 75 kilograms, 0.6 to 0.8 million shrimps of 3-4 centimeters can be placed per acre, or Put 0.8-1.2 million tailed shrimps.
4. 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 baits; peanuts, wheat flour, and other grain baits and chopped fresh vegetables. And other plant foods. Due to the higher requirements of Macrobrachium rosenbergii on bait, the bait protein requirement for young juveniles is 35-40%, and the bait protein content 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 qualitatively, quantitatively, fixed-pointedly and regularly. The daily feeding amount is equivalent to 5-7% of the shrimp body weight, but it should be determined according to the change of 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.
5. Top-dressing: In order to ensure the formation of natural bait, it is necessary to regularly fertilize the fertilizer to make the water have a certain degree of fatness. Generally, the pig manure is applied once every half-month, 75-100 kg per mu, so that the plankton breeding, artificial recruitment Insufficient food.
6. Concealed material settings: Macrobrachium rosenbergii has to undergo multiple molting during its growth. Under normal circumstances, the weight will increase as the skin is crushed once every 7-10 days. 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.
7. Water Quality Management: Shallow ponds should be treated with shallow water as early as possible. The water depth is generally about 70 cm. After 15 days of stocking shrimps, fresh water is gradually added. 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, the pond shrimp fish polyculture
This model is divided into two common forms: Macrobrachium rosenbergii and adult fish polyculture and Macrobrachium rosenbergii and polyculture of fish species. Generally, 50-75 kg of shrimp are produced per mu and 100-200 kg of fish are produced per mu.
1. Pond selection: Mixed culture with adult fish, shrimp species specifications 3-4 cm, stocking density 2000-4000 acre per mu, first put fish species, then put shrimp species. Mixed with the fish species, first put the shrimp species, shrimp species stocking density 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.
2. Feeding management: The method can be carried out by referring 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.
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