The cultivation of fresh shrimps in autumn is about 4 centimeters of shrimp in September. After about 2 months of intensive cultivation, 5 to 6 centimeters of prawns will be cultivated. During the New Year and Spring Festival, they will be listed and sold at high prices. The entire production cycle of 3 to 4 months, 667? Benefits can reach more than 5,000 yuan, is a small investment, quick results, high efficiency breeding technology.
First, the choice of holding pool
The requirements for the temporary holding pool for the shrimps are close to the water source, the irrigation and drainage facilities are convenient, the water quality is fresh and pollution-free, and the transportation is convenient. The area of ​​the pond is 2,000 to 3,500 ft. It is suitable for the east-west rectangle, the slope ratio of the pond is 1:2.5~3, the water depth is 1.5~2.0 meters, the bottom is flat, and the silt layer does not exceed 10 cm. Open a shallow ditch at the bottom of the pond and dig a shrimp pond at a water outlet of 5 meters long, 3 meters wide, and 0.5 meters deep. Every 667 watts of water needs to be equipped with 0.5~1 kW aerators, and every 2000~3500 é…备 is equipped with 1 pump.
Second, shrimp species selection and delivery
The time for holding the shrimp in the autumn should be selected in mid-to-late September. The temporarily raised penaeid shrimp should be selected from about 4 centimeters in length, with complete limbs, strong vigor and no eggs, preferably from rivers, lakes, etc. In natural water bodies, soft shell shrimp should be removed. In general, the amount of water per 667 metre is 150-200 kg.
Third, the bait feed
The diets are mainly full-grain pellet feeds, supplemented by animal feeds (such as snails, river clams, river clams, small trash fish, etc.). Feeding time is 8 to 9 am and 6 to 7 pm. Feed 1/3 of the total amount in the morning and 2/3 of the total amount in the afternoon. The daily feed amount is generally 3%~5% of the total body weight of the shrimp and 0.5%~1% of the winter period.
Fourth, management measures
1, water quality management. Transparency 35-40 cm, dissolved oxygen 5 mg/l, pH 7-8. Add new water every 15 to 20 days, first and rear, about 30 centimeters each time. From September to October, the water depth is 1.0~1.2 meters. After entering the winter, the water level can be maintained at about 1.5 meters to facilitate heat preservation.
2, prevent floating head. Green shrimp are not tolerant of hypoxia and should be started with aerators in due course so that they can open at noon on sunny days and open early in the morning on cloudy days. If floating heads are found, they must be filled with water and oxygen, and if necessary, chemical oxygen boosters should be used first aid.
V. Disease Prevention
1. The enemy destroys. The enemy of green shrimp is mainly wild fish and water mice. Wild fish can be killed by Zhongnong 8901 shrimp protection agent Quanchiposa 310-6~510-6. Water mice can be killed manually or by drugs.
2. Disease prevention. During the holding period of the penaeid shrimp, the density is large, the amount of feeding is large, and the water quality changes quickly, which easily leads to disease. The main prevention measures are: regular (15 to 20 days) Quanchiposa lime 15 ~ 20 kg / 667?, To bactericidal calcium, adjust the PH value and water quality.
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