Astragalus has characteristics of large individuals, fast growth rate, strong genetic plasticity, etc. The freshwater aquaculture experimental field in Wendeng City, Shandong Province, utilized geothermal water resources and successfully introduced and cultured Amur sturgeon in Heilongjiang Province. The experimental results are summarized as follows:
First, the introduction of seed
On June 28th, 2001, the field introduced 1000 pounds of a sturgeon species from 8 cm in length/10 cm in tail/tail and 4 g/body in tail weight in Qingdao, Shandong Province. The car was transported by means of aerobic canvas, and 250 fish were loaded. /m3 water body, transported on the way for 5 hours, the transport survival rate is 100%.
Second, the choice of aquaculture pond Selection of carp culture ponds in the winter maintenance of the indoor two cement pools, effective water body 260 m3 (10.0m10.0m1.3m2 pool), into, drainage convenient and reasonable, and equipped with two 0. 75kW impeller type aerator.
Third, the preparation of fish before entering the pool
1. 7 days before entering the pond, the cement pond was flushed and disinfected with the disinfectant to disinfect the whole pond and fill the underground well water again. The water temperature was controlled at 22°C.
2. After the fish species are shipped back, use 4% saline solution to disinfect the fish body surface and adjust the temperature difference before putting it into the culture pond.
Fourth, daily management
1. Water quality management Water temperature regulation to the best adaptation temperature 22 °C ~ 24 °C, water quality requirements fresh, sewage 2 times a day, timely fishing out of the bait and feces floating on the water, daily water change 30%, 3 days big water change 1 Times. Aquaculture ponds maintain micro-flowing water.
2. Feeding and management of Squid began to attract food on the second day of the pond, and the special feed was used for fixed feeding. The amount of feeding and number of feeding were flexibly controlled according to the growth of the fish body. When the individual's body weight was below 50g, they were fed 5 times a day. , Daily feeding rate 10%, feed protein content 40% to 45%; Individual body weight 50g ~ 200g, feeding 4 times a day, daily feeding rate 6%, feed egg content from 37%; individual body weight in 200g Above, the daily feeding 4 times, the daily feeding rate of 4%, feed protein 32% to 35%. Each feeding should be completed within 40 minutes to 60 minutes.
3. Special person management shall be managed by special personnel, increase oxygen at regular time, observing the growth dynamics of carp, finding problems and dealing with them in time, and make production records.
4. Prevention of fish diseases According to the principle of "premature disease prevention and disease-free prevention", squid is dipped in 2% to 3% saline every 10 days for 15 minutes.
V. Harvest After 10 months of careful management and cultivation, on April 30, 2002, a carp will be formed from the fish catch pool: total output of 1188kg, average yield per mu 3956kg; average tail weight 1.25kg, maximum weight 1 .50kg; aquaculture survival rate of 95%, feed coefficient of 1.2.
Sixth, summary
1. The use of hot springs to control the temperature and regulate the water temperature to the optimal water temperature range for the growth of carp, the carp grows rapidly;
2. The use of hot spring water for breeding catfish can maintain the stability of the water quality environment and reduce the occurrence of diseases;
3. Oxygen-increasing equipment is available, and high-density farming is implemented. Increasing the feed intake of eels is one of the important factors for achieving high yields;
4. Regular use of drug prevention to prevent the occurrence of large-scale disease and improve the survival rate of carp culture;
5. Feed the full-priced feed to enhance the immune system of the fish and reduce the feed coefficient.
First, the introduction of seed
On June 28th, 2001, the field introduced 1000 pounds of a sturgeon species from 8 cm in length/10 cm in tail/tail and 4 g/body in tail weight in Qingdao, Shandong Province. The car was transported by means of aerobic canvas, and 250 fish were loaded. /m3 water body, transported on the way for 5 hours, the transport survival rate is 100%.
Second, the choice of aquaculture pond Selection of carp culture ponds in the winter maintenance of the indoor two cement pools, effective water body 260 m3 (10.0m10.0m1.3m2 pool), into, drainage convenient and reasonable, and equipped with two 0. 75kW impeller type aerator.
Third, the preparation of fish before entering the pool
1. 7 days before entering the pond, the cement pond was flushed and disinfected with the disinfectant to disinfect the whole pond and fill the underground well water again. The water temperature was controlled at 22°C.
2. After the fish species are shipped back, use 4% saline solution to disinfect the fish body surface and adjust the temperature difference before putting it into the culture pond.
Fourth, daily management
1. Water quality management Water temperature regulation to the best adaptation temperature 22 °C ~ 24 °C, water quality requirements fresh, sewage 2 times a day, timely fishing out of the bait and feces floating on the water, daily water change 30%, 3 days big water change 1 Times. Aquaculture ponds maintain micro-flowing water.
2. Feeding and management of Squid began to attract food on the second day of the pond, and the special feed was used for fixed feeding. The amount of feeding and number of feeding were flexibly controlled according to the growth of the fish body. When the individual's body weight was below 50g, they were fed 5 times a day. , Daily feeding rate 10%, feed protein content 40% to 45%; Individual body weight 50g ~ 200g, feeding 4 times a day, daily feeding rate 6%, feed egg content from 37%; individual body weight in 200g Above, the daily feeding 4 times, the daily feeding rate of 4%, feed protein 32% to 35%. Each feeding should be completed within 40 minutes to 60 minutes.
3. Special person management shall be managed by special personnel, increase oxygen at regular time, observing the growth dynamics of carp, finding problems and dealing with them in time, and make production records.
4. Prevention of fish diseases According to the principle of "premature disease prevention and disease-free prevention", squid is dipped in 2% to 3% saline every 10 days for 15 minutes.
V. Harvest After 10 months of careful management and cultivation, on April 30, 2002, a carp will be formed from the fish catch pool: total output of 1188kg, average yield per mu 3956kg; average tail weight 1.25kg, maximum weight 1 .50kg; aquaculture survival rate of 95%, feed coefficient of 1.2.
Sixth, summary
1. The use of hot springs to control the temperature and regulate the water temperature to the optimal water temperature range for the growth of carp, the carp grows rapidly;
2. The use of hot spring water for breeding catfish can maintain the stability of the water quality environment and reduce the occurrence of diseases;
3. Oxygen-increasing equipment is available, and high-density farming is implemented. Increasing the feed intake of eels is one of the important factors for achieving high yields;
4. Regular use of drug prevention to prevent the occurrence of large-scale disease and improve the survival rate of carp culture;
5. Feed the full-priced feed to enhance the immune system of the fish and reduce the feed coefficient.
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