l, Qingchi harm. After the ponds are built or old ponds are restored, clear ponds and clear ponds must be cleared of silt, algae, and animal predator organisms 20 days before development.
The method of clearing the hostile organisms is: ponds that do not accumulate water, drain the pond water after the shrimps have been harvested, and expose to sunlight for a winter. However, the exposed ponds cannot be drained and need to be cleared with drugs. Commonly used drugs are tea seed cake, bleach, fish rattan, quicklime and so on.
2, bait biological culture. After clearing, it can be used to incubate biological feed. It is the basic bait for prawns, has the advantages of simple method, high nutritional value, low labor and production cost. A basic bait cultivating a good shrimp pond, shrimp can be stocked within half a month without bait.
3, shrimp transportation and precautions. The proper transport of shrimps and shrimps has a great impact on their survival rate. Dissolved oxygen and water quality are major factors in transportation. Most of the current use of polyethylene bags oxygen transport. This method is light, safe and adaptable to various tools. In a polyethylene bag with a volume of 10 liters, about 1/4 of the fresh seawater is filled, about 20,000 shrimps are replenished, about 3/4 of the oxygen is recharged, and the bag is tightly closed. The transport time is not within 10 hours. There will be problems if it is safer to put bags in the trays.
The precautions for transportation of shrimps and shrimps include: 1 The seedlings cannot be used for nursery water in nursery ponds, but fresh seawater is used, and seawater that is cloudy or contaminated cannot be used. 2 The best seedling time is arranged in the early morning or late afternoon to avoid the intense heat at noon. The best transportation water temperature can be controlled to be similar to the water temperature in the nursery pool, and try to avoid exceeding 20°C.
4. Matters needing attention when laying seedlings. When laying seedlings, pay attention to whether the physicochemical factors in shrimp ponds are suitable for shrimp seedlings. When stocking in April, the water temperature should be kept stable above 14°C. When the seedlings are released, the water depth should not be less than 40cm, and the salinity should be 20-30. ‰ ‰ ‰ ‰, pH value of 7-8.6 is appropriate.
5, daily management of aquaculture
(1) Watching the pond. After stocking the shrimp, it is necessary to carefully inspect the pond and carefully observe the dynamics of the shrimp pond and the changes of the environmental factors. To prevent accidents from happening.
The observations of the patrol pond mainly include whether the gate and the filter are in good condition, whether the shrimp is active or ingested, whether the shelling is normal, whether the difference in environmental factors is too large, and whether the pool water has a strange smell.
(2) change the water. Changing water is an essential measure to improve water quality in shrimp ponds. It can increase dissolved oxygen in water, regulate salinity, pH, and water temperature, control the proliferation of monocytic algae, remove metabolic waste, and improve environmental conditions. Increase food organisms and stimulate shrimp shelling. The specific operation is generally as follows: In the early stage (within half a month after the shrimp is put in), the water is mainly added, and a small amount is added every day until the shrimp pond is filled. After that, the amount of water is changed every day, and the amount of water in the middle and later days can be increased to about 30%. In the normal situation in the later period, the daily water exchange volume should preferably be controlled at about 50%, so as to avoid excessive changes in environmental factors when the water exchange volume is too large.
(3) feeding; mainly small fish and shrimp, but also part of the feed with the bait, cockroaches, snails and so on. Under normal circumstances, more than 70% of the shrimp should reach full stomach or half full after one hour after feeding.
Due to the continuous expansion of the shrimp aquaculture area and the off-fish management during the prolific fish period, the shrimp feed must be replaced with natural feed in the breeding process. The good combination of baits has the following advantages: it can meet the nutritional needs of different stages of shrimp, especially Use the complementary function of protein to increase the utilization of feed, reduce the water quality and low-quality pollution of bait, reduce the disease, and facilitate preservation and feeding.
The method of clearing the hostile organisms is: ponds that do not accumulate water, drain the pond water after the shrimps have been harvested, and expose to sunlight for a winter. However, the exposed ponds cannot be drained and need to be cleared with drugs. Commonly used drugs are tea seed cake, bleach, fish rattan, quicklime and so on.
2, bait biological culture. After clearing, it can be used to incubate biological feed. It is the basic bait for prawns, has the advantages of simple method, high nutritional value, low labor and production cost. A basic bait cultivating a good shrimp pond, shrimp can be stocked within half a month without bait.
3, shrimp transportation and precautions. The proper transport of shrimps and shrimps has a great impact on their survival rate. Dissolved oxygen and water quality are major factors in transportation. Most of the current use of polyethylene bags oxygen transport. This method is light, safe and adaptable to various tools. In a polyethylene bag with a volume of 10 liters, about 1/4 of the fresh seawater is filled, about 20,000 shrimps are replenished, about 3/4 of the oxygen is recharged, and the bag is tightly closed. The transport time is not within 10 hours. There will be problems if it is safer to put bags in the trays.
The precautions for transportation of shrimps and shrimps include: 1 The seedlings cannot be used for nursery water in nursery ponds, but fresh seawater is used, and seawater that is cloudy or contaminated cannot be used. 2 The best seedling time is arranged in the early morning or late afternoon to avoid the intense heat at noon. The best transportation water temperature can be controlled to be similar to the water temperature in the nursery pool, and try to avoid exceeding 20°C.
4. Matters needing attention when laying seedlings. When laying seedlings, pay attention to whether the physicochemical factors in shrimp ponds are suitable for shrimp seedlings. When stocking in April, the water temperature should be kept stable above 14°C. When the seedlings are released, the water depth should not be less than 40cm, and the salinity should be 20-30. ‰ ‰ ‰ ‰, pH value of 7-8.6 is appropriate.
5, daily management of aquaculture
(1) Watching the pond. After stocking the shrimp, it is necessary to carefully inspect the pond and carefully observe the dynamics of the shrimp pond and the changes of the environmental factors. To prevent accidents from happening.
The observations of the patrol pond mainly include whether the gate and the filter are in good condition, whether the shrimp is active or ingested, whether the shelling is normal, whether the difference in environmental factors is too large, and whether the pool water has a strange smell.
(2) change the water. Changing water is an essential measure to improve water quality in shrimp ponds. It can increase dissolved oxygen in water, regulate salinity, pH, and water temperature, control the proliferation of monocytic algae, remove metabolic waste, and improve environmental conditions. Increase food organisms and stimulate shrimp shelling. The specific operation is generally as follows: In the early stage (within half a month after the shrimp is put in), the water is mainly added, and a small amount is added every day until the shrimp pond is filled. After that, the amount of water is changed every day, and the amount of water in the middle and later days can be increased to about 30%. In the normal situation in the later period, the daily water exchange volume should preferably be controlled at about 50%, so as to avoid excessive changes in environmental factors when the water exchange volume is too large.
(3) feeding; mainly small fish and shrimp, but also part of the feed with the bait, cockroaches, snails and so on. Under normal circumstances, more than 70% of the shrimp should reach full stomach or half full after one hour after feeding.
Due to the continuous expansion of the shrimp aquaculture area and the off-fish management during the prolific fish period, the shrimp feed must be replaced with natural feed in the breeding process. The good combination of baits has the following advantages: it can meet the nutritional needs of different stages of shrimp, especially Use the complementary function of protein to increase the utilization of feed, reduce the water quality and low-quality pollution of bait, reduce the disease, and facilitate preservation and feeding.
At ancient times, people picked up wild fruits, and they found the magic of Goji , The pictograph word "qi" in Chinese character just like a man knelt down at a Goji tree , the left of the character "qi" seems like a tree, and the right like a person bowed down. That means as early as four thousand years ago, people found that Goji can keep fit and role of longevity ,Goji has magic power to people`s life.
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