Institute of Agricultural Sciences, Jiangkou County, Guizhou Province, Ma Shiliang, Post Code: 554400
Production practices have proven that fish pond management is the key to raising fish production and success or failure. Management of fish farming requires meticulous depth and perseverance. Its technical measures are:
1. Diligent ponds, anti-floating heads should be patrolled 2 or 3 times a day, look for fish floating heads before and after dawn, look at the fish’s feeding situation in the afternoon, and check the fish’s all-day eating conditions on sunset to see if there are signs of floating heads. At the turn of the spring and summer, when the weather is changeable, or when the weather changes suddenly, the weather should fluctuate around midnight to prevent serious floating heads.
Due to high water temperature, low dissolved oxygen, severe decomposition of organic matter, no photosynthesis, and strong respiration, large amounts of oxygen will cause fish to float. The severity of the floating head should be predicted and judged according to the weather and the dynamics of the fish.
The weather was sweltering, the water temperature was high, the water quality was high, and the fish’s food intake suddenly dropped. Pool fish concentrated on the water layer and did not sink. The discovery of shrimp death in the morning indicated that the oxygen in the pool was reduced, water quality deteriorated, and floating heads would occur. Especially when the weather is hot and rainy, the floating head will happen before midnight.
Floating heads, fish clusters, scared and sank, then they went up again and disappeared 1 to 2 hours after sunrise. Floating head weight is the fish scattered unable to swim, approaching the edge of the pool, scared not sink, squatting prominent, pale.
To prevent floating heads: 1 Stopping the feeding and fertilizer application when signs of floating head are found; 2 Inject water immediately to increase oxygen in the water and adjust the water quality; 3 If the water source is difficult, use 100 grams of yellow mud per 667m (1 mu) and add salt 5 Kilogram or raw gypsum powder 2.5 kilograms of water into pulp, sprinkled all over the pool, to be first aid.
2. Diligent decontamination, disease prevention, often remove the remaining grass, residues, remove large stems can not rot grass roots. Frequently move the grass racks, clean the food table, sprinkle lime on the grass racks and food table areas, and regular drug prevention. Pay attention to exterminate predators.
3. Diligently inject water, and promote the development of wide-water culture of large fish. The level of fish ponds is constantly adjusted with the size and season of the fish. During the season when the temperature is high and the fish is busy, it is necessary to add water regularly, and water can be added 4 to 5 times per month in order to increase the activity space of the fish. Adding water not only increases oxygen, improves water quality, but also brings in nutrients that help plankton breed and promote fish growth.
4. Diligent records, construction of archives fish farmers to do a account for each fish pond, every fish pond has a fish diary (commonly known as Tongka), stocking dates, mantissa, specifications, weight for all types of fish species Each harvest date, number of tails, specifications, weight, type and quantity of daily feeding, fertilization, and water quality management and fish disease prevention and control should be recorded in the corresponding form for summary and accumulation. Experience is used as a basis for future planning and improvement of fish farming techniques. In addition, during the main growing season of fish, the growth condition should be checked regularly (usually once every month) in order to understand the effect of fish farming and take corresponding measures to accelerate fish growth.
Production practices have proven that fish pond management is the key to raising fish production and success or failure. Management of fish farming requires meticulous depth and perseverance. Its technical measures are:
1. Diligent ponds, anti-floating heads should be patrolled 2 or 3 times a day, look for fish floating heads before and after dawn, look at the fish’s feeding situation in the afternoon, and check the fish’s all-day eating conditions on sunset to see if there are signs of floating heads. At the turn of the spring and summer, when the weather is changeable, or when the weather changes suddenly, the weather should fluctuate around midnight to prevent serious floating heads.
Due to high water temperature, low dissolved oxygen, severe decomposition of organic matter, no photosynthesis, and strong respiration, large amounts of oxygen will cause fish to float. The severity of the floating head should be predicted and judged according to the weather and the dynamics of the fish.
The weather was sweltering, the water temperature was high, the water quality was high, and the fish’s food intake suddenly dropped. Pool fish concentrated on the water layer and did not sink. The discovery of shrimp death in the morning indicated that the oxygen in the pool was reduced, water quality deteriorated, and floating heads would occur. Especially when the weather is hot and rainy, the floating head will happen before midnight.
Floating heads, fish clusters, scared and sank, then they went up again and disappeared 1 to 2 hours after sunrise. Floating head weight is the fish scattered unable to swim, approaching the edge of the pool, scared not sink, squatting prominent, pale.
To prevent floating heads: 1 Stopping the feeding and fertilizer application when signs of floating head are found; 2 Inject water immediately to increase oxygen in the water and adjust the water quality; 3 If the water source is difficult, use 100 grams of yellow mud per 667m (1 mu) and add salt 5 Kilogram or raw gypsum powder 2.5 kilograms of water into pulp, sprinkled all over the pool, to be first aid.
2. Diligent decontamination, disease prevention, often remove the remaining grass, residues, remove large stems can not rot grass roots. Frequently move the grass racks, clean the food table, sprinkle lime on the grass racks and food table areas, and regular drug prevention. Pay attention to exterminate predators.
3. Diligently inject water, and promote the development of wide-water culture of large fish. The level of fish ponds is constantly adjusted with the size and season of the fish. During the season when the temperature is high and the fish is busy, it is necessary to add water regularly, and water can be added 4 to 5 times per month in order to increase the activity space of the fish. Adding water not only increases oxygen, improves water quality, but also brings in nutrients that help plankton breed and promote fish growth.
4. Diligent records, construction of archives fish farmers to do a account for each fish pond, every fish pond has a fish diary (commonly known as Tongka), stocking dates, mantissa, specifications, weight for all types of fish species Each harvest date, number of tails, specifications, weight, type and quantity of daily feeding, fertilization, and water quality management and fish disease prevention and control should be recorded in the corresponding form for summary and accumulation. Experience is used as a basis for future planning and improvement of fish farming techniques. In addition, during the main growing season of fish, the growth condition should be checked regularly (usually once every month) in order to understand the effect of fish farming and take corresponding measures to accelerate fish growth.
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