Mixed fish and shrimp technology
2019-05-08 07:03:01
I. Selection of ponds In order to meet the ecological environment requirements of various polycultures, and to facilitate the exchange of water and management, shrimp ponds are generally selected as bottoms or sediments, and the sediment concentration is 40% to 60%. The surface of 5 cm ~ 10 cm of soft mud is more ideal, more suitable for the survival of insects. The pond area is between 2 and 5 acres.
Second, the pond clears the pond before the Spring Festival to remove excess silt, and then carry out renovation. The earthworms are set on the inner side of the pond and in the middle high of the bottom of the pond. The ploughshare is used for cultivating 10 centimeters deep. In the pond, two ploughs are combined to form a road type, and then the iron tooth rake is flat. Its width is 2 meters to 3 meters. Approximately 20 centimeters above the bottom of the pond, the area accounts for 30% to 40% of the total area of ​​the pond, and a small ditch between 60 cm and 80 cm is formed between the two banks for easy management and drainage. After the planting is completed, use 100 kg of quicklime or 2 kg to 3 kg of bleaching powder per acre for disinfection in the first half of transplanting, kill the enemy's predators, and then start the water intake. The water inlet should be packed with a 60 mesh screen. Prevent enemy creatures from entering the pool with water.
Third, fertigation water quality General water depth of 40 cm, the start of fertilizer, cultivating basic food organisms, generally urea 2 kg to 3 kg per acre (or 5 kg of ammonium bicarbonate). Fertilizers are weighed and then placed in wooden barrels. After diluting and diluting with water, the whole pool is evenly spilled. It is also possible to apply organic fertilizer (chicken manure or other manure) on the bottom of drained water, 30 kg to 40 kg per acre. Chicken manure should be sun dried, crushed, added with appropriate amount of insecticide, and evenly sprinkled on the gills.
Fourth, seed stocking
1. The broadcast time of seedlings and seedlings should be determined according to the local natural conditions and climatic conditions. Generally, in the high tide around February 2nd lunar month of the lunar calendar, seedlings with a specification of 4,000 to 5,000 seeds per kilogram will be purchased. After being transported to the destination, it should be placed in a cool place for about 1 hour so that the water pipes can be shrunk and then put on seedlings. The planting density should be calculated based on the amount of seedlings, and 160,000 to 180,000 grains per acre should be put on.
2. Castanopsis species According to the habits and growth characteristics of barracuda, from the end of March to the end of April, 10 cm to 15 cm seedlings are planted, and 50 to 100 pigs per acre are placed. The relatively low activity of fish fry is conducive to the improvement of survival rate. The species of this species is mainly from coastal fishing and can fully meet the needs of breeding.
3. Shrimp seedlings
In early May, the average number of Chinese shrimp seedlings about 2cm in length put on plastic greenhouses are put into 2000 to 2500 per acre, and the stocking densities of shrimps are properly reduced. The purpose is to maintain a good water quality environment and ensure shrimp Rapid growth reduces the incidence of shrimp.
Fifth, the harvest
Around mid-October, we must pay special attention to changes in the weather and water temperature, harvest fish and shrimp in time, and pests can be harvested one after another until February of the following year. Insects are commonly used to produce 250 kilograms per mu. Farming specifications range from 80 to 100 grains per kilogram. The per mu output value is 2,400 yuan. The general yield of shrimp is about 20 kilograms, the average body length is between 9 cm and 12 cm, and the per mu output value is 900 yuan. Barracuda fish generally produce 45 kilograms per mu, specifications about 0.5 kilograms, 200 yuan per mu. Cumulative total output value of 3,500 yuan, after deducting the production costs of about 2,000 yuan in the same year, can achieve a profit of 1,500 yuan in the year.
Second, the pond clears the pond before the Spring Festival to remove excess silt, and then carry out renovation. The earthworms are set on the inner side of the pond and in the middle high of the bottom of the pond. The ploughshare is used for cultivating 10 centimeters deep. In the pond, two ploughs are combined to form a road type, and then the iron tooth rake is flat. Its width is 2 meters to 3 meters. Approximately 20 centimeters above the bottom of the pond, the area accounts for 30% to 40% of the total area of ​​the pond, and a small ditch between 60 cm and 80 cm is formed between the two banks for easy management and drainage. After the planting is completed, use 100 kg of quicklime or 2 kg to 3 kg of bleaching powder per acre for disinfection in the first half of transplanting, kill the enemy's predators, and then start the water intake. The water inlet should be packed with a 60 mesh screen. Prevent enemy creatures from entering the pool with water.
Third, fertigation water quality General water depth of 40 cm, the start of fertilizer, cultivating basic food organisms, generally urea 2 kg to 3 kg per acre (or 5 kg of ammonium bicarbonate). Fertilizers are weighed and then placed in wooden barrels. After diluting and diluting with water, the whole pool is evenly spilled. It is also possible to apply organic fertilizer (chicken manure or other manure) on the bottom of drained water, 30 kg to 40 kg per acre. Chicken manure should be sun dried, crushed, added with appropriate amount of insecticide, and evenly sprinkled on the gills.
Fourth, seed stocking
1. The broadcast time of seedlings and seedlings should be determined according to the local natural conditions and climatic conditions. Generally, in the high tide around February 2nd lunar month of the lunar calendar, seedlings with a specification of 4,000 to 5,000 seeds per kilogram will be purchased. After being transported to the destination, it should be placed in a cool place for about 1 hour so that the water pipes can be shrunk and then put on seedlings. The planting density should be calculated based on the amount of seedlings, and 160,000 to 180,000 grains per acre should be put on.
2. Castanopsis species According to the habits and growth characteristics of barracuda, from the end of March to the end of April, 10 cm to 15 cm seedlings are planted, and 50 to 100 pigs per acre are placed. The relatively low activity of fish fry is conducive to the improvement of survival rate. The species of this species is mainly from coastal fishing and can fully meet the needs of breeding.
3. Shrimp seedlings
In early May, the average number of Chinese shrimp seedlings about 2cm in length put on plastic greenhouses are put into 2000 to 2500 per acre, and the stocking densities of shrimps are properly reduced. The purpose is to maintain a good water quality environment and ensure shrimp Rapid growth reduces the incidence of shrimp.
Fifth, the harvest
Around mid-October, we must pay special attention to changes in the weather and water temperature, harvest fish and shrimp in time, and pests can be harvested one after another until February of the following year. Insects are commonly used to produce 250 kilograms per mu. Farming specifications range from 80 to 100 grains per kilogram. The per mu output value is 2,400 yuan. The general yield of shrimp is about 20 kilograms, the average body length is between 9 cm and 12 cm, and the per mu output value is 900 yuan. Barracuda fish generally produce 45 kilograms per mu, specifications about 0.5 kilograms, 200 yuan per mu. Cumulative total output value of 3,500 yuan, after deducting the production costs of about 2,000 yuan in the same year, can achieve a profit of 1,500 yuan in the year.
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