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Key Technical Points for Freeze Prevention in Winter Temporary Holding of River Crabs
1. Breaking the ice. Commercial crabs are held temporarily at high density, and after snow the temperature is relatively low, making aquaculture management more difficult. By opening ice holes or breaking the ice, on the one hand you can observe whether the overwintering pond is short of water or oxygen, and on the other hand, some harmful gases in the water body can escape. When oxygen in the water is low
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Key Technical Points for Feeding and Management of Dairy Cows During the Dry Period
In order to raise dairy cows well during the dry period, the dry period is generally divided into two stages for feeding: the early dry period and the late dry period. The entire stage from the start of drying off to 15 days before calving is called the early dry period, and the 2 weeks before calving to parturition is often called the late dry period (also known as
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Control Methods and Key Technical Points for Deformed Fruit in Greenhouse Strawberries
(1) Promote full flower bud differentiation. Whether strawberry flower buds differentiate fully is an important factor affecting the yield and quality of greenhouse strawberries. When flower bud differentiation is good, there are more flowers, larger fruit, and fewer deformed fruit. Generally, 2 weeks before planting, root pruning, shading, nitrogen control, and removal of old leaves are started to promote
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Key Technical Points for Disease Prevention and Control in Artificial Scallop Seed Rearing
During artificial seed rearing, scallop larvae are highly susceptible to bacterial and fungal infections, which cause mass mortality. Among the common bacterial diseases are Vibrio species; one type, Vibrio anguillarum, specializes in decomposing organic matter and can break down the larval velum within a very short time. This symptom occurs especially within
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Key Technical Points on Drug Use in Eel Farming in Summer and Autumn
In the high-temperature seasons of summer and autumn, eel growth is at its most vigorous, but the incidence of eel diseases is also at its highest. Many farmers, when eels fall ill, resort to desperate measures and use drugs haphazardly, only to spend a lot of money in vain without curing the eel diseases. Worse still, drug abuse causes water quality pollution,
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Detailed Explanation of Key Technical Points for Eel Farming in Earthen Ponds
Eel, also known as white eel, white loach, etc., is a valuable fish species for freshwater aquaculture. Its flesh is tender, its flavor delicious, and its nutritional value high; it has medicinal effects such as removing blood stasis and promoting tissue regeneration, and nourishing and tonifying the body. Eel grows rapidly and has strong adaptability; even in waters with very little dissolved oxygen where other fish cannot survive, it can live normally. The technical requirements for artificial farming are not high, and feed sources are also plentiful.
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Technical Key Points for Cage Culture of Bighead Carp in Reservoirs
I. Cage Structure The cage material is polyethylene, the netting twine diameter is 1.13 mm, the mesh size is 35 cm, the cage specifications are 4 m x 7 m x 2 m, a single-layer cage is adopted, the frame is bamboo poles, the bamboo pole diameter is about 10 cm, several are connected as one unit, and fixed with sinkers.
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Detailed Explanation of Key Technical Points for Bighead Carp Cage Culture
Cage fish farming technology is a three-dimensional aquaculture technique that makes full use of reservoir resources. It has the advantages of low farming cost and high benefits, and is deeply favored by the vast number of fish farmers. Among them, the technique of using cages to culture bighead carp is one of the most profitable among many farming projects.
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How to Raise Sea Bass Healthily? Master These Technical Key Points
Sea bass, also known as Japanese sea bass or seven-star bass, belongs taxonomically to the order Perciformes, family Lateolabracidae. Because it breeds and grows in coastal waters, unlike the largemouth bass and Mandarin bass that grow in freshwater, it is also called sea bass. Sea bass is a fierce carnivorous fish that naturally feeds on small fish and shrimp. In artificial
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Key Technical Points for Pollution-Free Cage Culture of Bass
1. Culture water area The culture water area generally requires a water depth of 2 m-2.5 m. Half a month before stocking fry, quicklime is spread over the surrounding water area for disinfection. 2. Stocking density and disinfection of fry and fingerlings The stocking size is 0.5 g/fish-0.6 g/fish, and the stocking density is 100 fish/mu-120 fish/sq m. Stock
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