Shrimp polyculture is a new technology that utilizes shrimp ponds to cultivate oysters in concrete without affecting shrimp farming the year before. It can not only improve the utilization rate of ponds and the quality of commercial shrimps and clams, but also greatly increase the economic benefits of pond culture. . For example, Tongxiang, Zhejiang Province and Kunshan, Jiangsu Province used the shrimp ponds for polyculture in the shrimp ponds, and they all obtained good economic benefits. Now introduce the farming technology as follows, for the conditions of local participation in the application.
I. Pond conditions The area of ​​ponds mixed with shrimps and shrimps is preferably 5-6 mu. Pool depth 1.2-1.5 meters, water depth 0.8-1 meters. The slope of the pond is 1:3, and the pool is firm. In order to prevent escaping and fleeing, you can use iron sheet or concrete tile to prevent escape. When you are trying to escape from the wall, you are required to bury 20 centimeters underground and 30 centimeters high on the ground. The pool is located at the south position of the south and a few cement tiles are used as a feed station. It is designed to put half of the water in the side of the pool along the water and half on the water. The pond needs to pay attention to drainage convenience, and the aquaculture water source should meet the national fishery water standards.
Second, shrimp oysters stocking (a) pre-stocking preparations. In addition to the new pond, the old ponds must completely drain the pool water and clear more than 15 cm of mud, and then disinfect it with 100 kg of dry lime. Clear water is injected 80 centimeters after 3 days. When the water is injected, the water inlet is applied with a 80 mesh sieve filter to prevent the enemy from entering the shrimp pond.
In order to supplement the biological feed, 100-150 kilograms of fresh snails should be allowed to grow before they are stocked.
(b) One species of stocking. The stocking density is based on the cultivation method of the year. Therefore, the stock size for stocking should not be less than 250 grams, so that by the time of autumn stop, a good quality product of about 0.6 kg can be developed. Stocking density is 150 per mu.
Restocking time is generally from mid-May to early June in East China and Central China, and early May in South China. The water temperature of the pond at the time of stocking is required to be above 25°C and the weather is fine. The species of stocking requires uniform specifications, and no disease or injury. Before stocking, the carcass can be soaked in 4% saline for 10 minutes.
(3) The shrimp species that are stocked and stocked by the shrimps are best produced locally by the self-producing freshwater prawn. The specification of shrimp species requires 1.5 cm or more, and the stocking quantity is 60,000 mu per mu. Restocking time in early July, shrimp species can be increased to 1 meter after pooling.
Third, the daily management of daily management mainly to shrimp. Shrimps are fed on conventional feeds. After stocking, some fresh live fish such as small ragfish and pig liver can be put in stocking. After one month, they can gradually stop feeding. Afterwards, they use bait shrimp and breeding snails as baits.
During the breeding period, appropriate lime is used to maintain the pH of the pool water at 7-7.5. Appropriate changing of water, change the amount of water is generally 1/5 of the original pool of water.
To do a daily tour of the pond, it is mainly to observe the activities of the shrimps and cockroaches in the pond, the intact conditions of the entrance and exit water fences, and the changes in the water quality, etc., and make records and discover problems in time.
Fourth, fishing and temporary shrimp farming can be based on market conditions and growth specifications to take the combination of catch and centralized fishing. The clams have to wait until the dry pool is caught at the end of the harvest. For example, if you can't sell it once, you can hold it temporarily. You can store 25 centimeters thick moist sand on the free floor of your home or warehouse and bury it in the sand. Usually at room temperature around 15C, can save more than 30 days. Gradually listed on the market according to market conditions.
In addition to the cultivation method of the year, the shrimp and mantis polyculture includes the cultivation method of small clams and shrimps for 2 years, seedlings and the cultivation of shrimps for 3 years, etc., and each place can be adapted to local conditions according to specific local conditions and market conditions.
I. Pond conditions The area of ​​ponds mixed with shrimps and shrimps is preferably 5-6 mu. Pool depth 1.2-1.5 meters, water depth 0.8-1 meters. The slope of the pond is 1:3, and the pool is firm. In order to prevent escaping and fleeing, you can use iron sheet or concrete tile to prevent escape. When you are trying to escape from the wall, you are required to bury 20 centimeters underground and 30 centimeters high on the ground. The pool is located at the south position of the south and a few cement tiles are used as a feed station. It is designed to put half of the water in the side of the pool along the water and half on the water. The pond needs to pay attention to drainage convenience, and the aquaculture water source should meet the national fishery water standards.
Second, shrimp oysters stocking (a) pre-stocking preparations. In addition to the new pond, the old ponds must completely drain the pool water and clear more than 15 cm of mud, and then disinfect it with 100 kg of dry lime. Clear water is injected 80 centimeters after 3 days. When the water is injected, the water inlet is applied with a 80 mesh sieve filter to prevent the enemy from entering the shrimp pond.
In order to supplement the biological feed, 100-150 kilograms of fresh snails should be allowed to grow before they are stocked.
(b) One species of stocking. The stocking density is based on the cultivation method of the year. Therefore, the stock size for stocking should not be less than 250 grams, so that by the time of autumn stop, a good quality product of about 0.6 kg can be developed. Stocking density is 150 per mu.
Restocking time is generally from mid-May to early June in East China and Central China, and early May in South China. The water temperature of the pond at the time of stocking is required to be above 25°C and the weather is fine. The species of stocking requires uniform specifications, and no disease or injury. Before stocking, the carcass can be soaked in 4% saline for 10 minutes.
(3) The shrimp species that are stocked and stocked by the shrimps are best produced locally by the self-producing freshwater prawn. The specification of shrimp species requires 1.5 cm or more, and the stocking quantity is 60,000 mu per mu. Restocking time in early July, shrimp species can be increased to 1 meter after pooling.
Third, the daily management of daily management mainly to shrimp. Shrimps are fed on conventional feeds. After stocking, some fresh live fish such as small ragfish and pig liver can be put in stocking. After one month, they can gradually stop feeding. Afterwards, they use bait shrimp and breeding snails as baits.
During the breeding period, appropriate lime is used to maintain the pH of the pool water at 7-7.5. Appropriate changing of water, change the amount of water is generally 1/5 of the original pool of water.
To do a daily tour of the pond, it is mainly to observe the activities of the shrimps and cockroaches in the pond, the intact conditions of the entrance and exit water fences, and the changes in the water quality, etc., and make records and discover problems in time.
Fourth, fishing and temporary shrimp farming can be based on market conditions and growth specifications to take the combination of catch and centralized fishing. The clams have to wait until the dry pool is caught at the end of the harvest. For example, if you can't sell it once, you can hold it temporarily. You can store 25 centimeters thick moist sand on the free floor of your home or warehouse and bury it in the sand. Usually at room temperature around 15C, can save more than 30 days. Gradually listed on the market according to market conditions.
In addition to the cultivation method of the year, the shrimp and mantis polyculture includes the cultivation method of small clams and shrimps for 2 years, seedlings and the cultivation of shrimps for 3 years, etc., and each place can be adapted to local conditions according to specific local conditions and market conditions.