Japanese prawns have the features of wide temperature, strong vitality, and resistance to drying. They are suitable for the sale and sale of live shrimp. The high selling price and the ability to carry out multi-flight breeding are beneficial to improving the breeding efficiency of shrimp ponds. The main technical measures for Japanese prawn dip breeding are described below:
I. Preparation before release
1. Shrimp tank selection requirements are shrimp ponds that are far from the estuary and have a sandy or sandy bottom. The area of ​​each shrimp pond is indefinite, generally ranging from 10 mu to 30 mu, with a water depth of 1.2 to 1.5 meters. Both sides of the shrimp pond are provided with a suitable width of water inlet and outlet gates. Each shrimp pond should be equipped with mechanical water lifting equipment. The water quality of the shrimp ponds is fresh and non-polluting, with a salinity of over 23 , and a pH of 7.6-8.6.
2. Dredging Each year after the autumn shrimp ponds are harvested, open and enter the drainage gates. The tide pumping water repeatedly flushes the bottom of the pool and discharges some of the contaminants. Then the gates are exposed for exposure and dredging. The depth of dredging can be determined by the degree of pollution so that the clean sand layer can be seen. At the same time as the dredging, the next meal was repaired and reinforced, including dam repair, plugging the loopholes, and repairing the gate.
3. Disinfection Disinfect the shrimp pond approximately 15 days before that time with 15 kg/mu quicklime or 80 ppm to 100 ppm bleach.
4. Fertilizer water 15 days before planting, water 60 cm, uremic use of 2 kg per mu, 0.2 kg of phosphate fertilizer, the basic food to cultivate, so that the water was yellow-green or tea-brown, water clarity of about 30 cm.
Second, seed stocking
1. Seeds require uniform size, robust and lively, and the appendages and thoracic organs are complete and energetic. When frightened, the abdomen is bowed and bouncing; the swimming is straight, the tentacles reach forward, and the response is stimulating; the body surface is bright and clean. Gray-brown, no appendages.
2. Seed transport mainly adopts double-layer plastic bag oxygenation transport method. The diameter of the plastic bag is 40 cm, the height is 80 cm, and the water is 10 liters. Each bag is then filled with 10000 to 15,000 tails of 0.7 to 1 cm body length and then filled with oxygen (2 times the volume of water). The rubber band tightly holds the mouth of the bag in a carton. The size of the carton is 40 centimeters, 80 centimeters, and 50 centimeters. Two cartons are placed in each carton. The top of each box is filled with crushed ice that is not directly in contact with the prawn. 50 grams to 100 grams. The packaging method can be shipped, shipped or airlifted.
3. Seedling stocking head Japanese prawn seedlings are stocked in mid-to-late April, acre stocking specifications of 0.7 cm to 1 cm of shrimp seedlings from 12,000 to 15,000; second seedlings of Japanese prawn reared at the first time. After the Japanese prawn harvested the clear pond, from late July to early August, the acre stocking size of 0.7 cm to 1 cm was about 10,000.
Third, daily management
1. Feeding The bait is mainly used to broadcast live small shellfish (mainly Lancome) to the bottom of the pool, supplemented by feeding with food or peanut cake. In the middle and late period, the fish and prawns, and the broken fresh mussels are mainly used, and the daily feeding rate is generally 5% to 8%, and the amount can be increased or decreased depending on the feeding conditions. Due to the strong sand-sucking characteristics of Japanese shrimps, which lurk in the pool during the day with little activity, the feeding time should be carried out at night. Under normal circumstances, 70% of the daily feed amount will be fed from 6 hours to 7 hours in the evening, and 30% of the daily feed will be fed in the early morning.
2. Water quality management In the initial stage of aquaculture, fertilizer and water are the main factors. Water is gradually added to the pool depending on changes in water quality, fatness, and water. Daily deepening is 3 cm to 5 cm, or 3 days to 4 water is added 15 cm to 20 cm to keep the pool Ecological balance, when the shrimp body reaches 5 centimeters, add the water to more than 1 centimeter. During the middle period of aquaculture, from the previous "fat water" to "live water", the general daily water exchange rate of 10% to 20%. In the later period of cultivation, water pollution will be considered, but when the water is changed, the amount of water changes. At the same time, attention should be paid to the disinfection of pool water in the middle and later stages of breeding. Generally, 15 to 20 ppm of quicklime is applied between 2 and 3 days before the shell of the shrimp.
3. Daily observations The pool water temperature, salinity, pH, and transparency are routinely measured every day. Pay attention to observe shrimp activity and feeding conditions. Before the hot weather, sudden changes in temperature, and early morning hours, we must pay more attention to strengthening the patrol pool inspection, identify problems, and take timely measures.
Fourth, harvest
1. The first harvest of Japanese shrimp is generally from late June to mid-July, when the number of listed fresh aquatic products is relatively reduced and the price of live shrimp is high.
2. The second harvest of Japanese shrimp can arrange harvest time according to the season and market changes, and try to harvest all the shrimp before the water temperature drops to 5 degrees Celsius.
I. Preparation before release
1. Shrimp tank selection requirements are shrimp ponds that are far from the estuary and have a sandy or sandy bottom. The area of ​​each shrimp pond is indefinite, generally ranging from 10 mu to 30 mu, with a water depth of 1.2 to 1.5 meters. Both sides of the shrimp pond are provided with a suitable width of water inlet and outlet gates. Each shrimp pond should be equipped with mechanical water lifting equipment. The water quality of the shrimp ponds is fresh and non-polluting, with a salinity of over 23 , and a pH of 7.6-8.6.
2. Dredging Each year after the autumn shrimp ponds are harvested, open and enter the drainage gates. The tide pumping water repeatedly flushes the bottom of the pool and discharges some of the contaminants. Then the gates are exposed for exposure and dredging. The depth of dredging can be determined by the degree of pollution so that the clean sand layer can be seen. At the same time as the dredging, the next meal was repaired and reinforced, including dam repair, plugging the loopholes, and repairing the gate.
3. Disinfection Disinfect the shrimp pond approximately 15 days before that time with 15 kg/mu quicklime or 80 ppm to 100 ppm bleach.
4. Fertilizer water 15 days before planting, water 60 cm, uremic use of 2 kg per mu, 0.2 kg of phosphate fertilizer, the basic food to cultivate, so that the water was yellow-green or tea-brown, water clarity of about 30 cm.
Second, seed stocking
1. Seeds require uniform size, robust and lively, and the appendages and thoracic organs are complete and energetic. When frightened, the abdomen is bowed and bouncing; the swimming is straight, the tentacles reach forward, and the response is stimulating; the body surface is bright and clean. Gray-brown, no appendages.
2. Seed transport mainly adopts double-layer plastic bag oxygenation transport method. The diameter of the plastic bag is 40 cm, the height is 80 cm, and the water is 10 liters. Each bag is then filled with 10000 to 15,000 tails of 0.7 to 1 cm body length and then filled with oxygen (2 times the volume of water). The rubber band tightly holds the mouth of the bag in a carton. The size of the carton is 40 centimeters, 80 centimeters, and 50 centimeters. Two cartons are placed in each carton. The top of each box is filled with crushed ice that is not directly in contact with the prawn. 50 grams to 100 grams. The packaging method can be shipped, shipped or airlifted.
3. Seedling stocking head Japanese prawn seedlings are stocked in mid-to-late April, acre stocking specifications of 0.7 cm to 1 cm of shrimp seedlings from 12,000 to 15,000; second seedlings of Japanese prawn reared at the first time. After the Japanese prawn harvested the clear pond, from late July to early August, the acre stocking size of 0.7 cm to 1 cm was about 10,000.
Third, daily management
1. Feeding The bait is mainly used to broadcast live small shellfish (mainly Lancome) to the bottom of the pool, supplemented by feeding with food or peanut cake. In the middle and late period, the fish and prawns, and the broken fresh mussels are mainly used, and the daily feeding rate is generally 5% to 8%, and the amount can be increased or decreased depending on the feeding conditions. Due to the strong sand-sucking characteristics of Japanese shrimps, which lurk in the pool during the day with little activity, the feeding time should be carried out at night. Under normal circumstances, 70% of the daily feed amount will be fed from 6 hours to 7 hours in the evening, and 30% of the daily feed will be fed in the early morning.
2. Water quality management In the initial stage of aquaculture, fertilizer and water are the main factors. Water is gradually added to the pool depending on changes in water quality, fatness, and water. Daily deepening is 3 cm to 5 cm, or 3 days to 4 water is added 15 cm to 20 cm to keep the pool Ecological balance, when the shrimp body reaches 5 centimeters, add the water to more than 1 centimeter. During the middle period of aquaculture, from the previous "fat water" to "live water", the general daily water exchange rate of 10% to 20%. In the later period of cultivation, water pollution will be considered, but when the water is changed, the amount of water changes. At the same time, attention should be paid to the disinfection of pool water in the middle and later stages of breeding. Generally, 15 to 20 ppm of quicklime is applied between 2 and 3 days before the shell of the shrimp.
3. Daily observations The pool water temperature, salinity, pH, and transparency are routinely measured every day. Pay attention to observe shrimp activity and feeding conditions. Before the hot weather, sudden changes in temperature, and early morning hours, we must pay more attention to strengthening the patrol pool inspection, identify problems, and take timely measures.
Fourth, harvest
1. The first harvest of Japanese shrimp is generally from late June to mid-July, when the number of listed fresh aquatic products is relatively reduced and the price of live shrimp is high.
2. The second harvest of Japanese shrimp can arrange harvest time according to the season and market changes, and try to harvest all the shrimp before the water temperature drops to 5 degrees Celsius.