CATDOLL : CATDOLL: What harm does the cultivation of river mussels cause to the water body? What harm does the cultivation of river mussels cause to the water body?

1. What harm will the cultivation of river mussels cause to the water body? What harm will the cultivation of river mussels cause to the water body?

1. The fertilizers and feeds needed for mussel farming cause devastating pollution to the water.

2. Due to the problem of excessive fertilization in pearl farming, the water quality has been polluted to a certain extent.

3. Clam farming is like locusts. When locusts pass through, the food chain in the water body is destroyed.

4. If river clams die, they will stink, and in a short range, the entire water quality will become smelly. The death of river clams will affect the water quality.

5. After clams have been raised for a period of time, a large amount of mud and organisms (such as algae, freshwater sponges, and shrinking worms) often grow on the breeding grounds and the clams.

2. Please tell me how to cultivate river clams. Thank you!!!

The organic matter in mud is mainly algae.

River clams grow by filtering various organisms in the water, so water quality control is particularly important. Generally, the water is required to be flushed once every half a month, and the water exchange volume is required to reach about 50 cm. In summer and the season when fish and clams are sick, the water is required to be changed every 10 days to make the water quality reach "rich, tender and refreshing".

3. How to breed snails, turtles, loaches, snails, and rice in an ecological and efficient way

How to raise snails, soft-shelled turtles, loaches, field snails, and rice in an ecological and efficient way. First, surround the soft-shelled turtles tightly, 1.5 feet away from the water surface. Then release loaches, field snails, and crayfish seeds in the rice fields. They all like to eat animal and plant feed. However, loaches, field snails, and crayfish are all things that soft-shelled turtles like to eat. There must be a 1-meter to 1.5-meter wide and 2-foot deep ditch in the rice fields for the soft-shelled turtles to live in. There must also be a platform for the soft-shelled turtles to bask in the sun. A small amount of carp and silver carp that soft-shelled turtles cannot eat can be raised in the rice fields. They like to eat corn flour, bran, and tofu dregs. Often sprinkle a little lime powder liquid every 10 meters to purify the water. Soft-shelled turtles like to eat animal viscera, small fish, shrimps, insects, mealworms, corn, wheat, barley, tender grass, vegetables, etc. The amount of feed is 5 to 10 percent of their body weight.

4. I am planning to build a pond of several meters at home. How can I produce good water? How can I maintain good water?

【Product Name】EM Probiotic Multi-Effect Active Liquid Ⅰ (Specially for Aquaculture)

【Main ingredients】Lactic acid bacteria, aquatic spore bacteria, aquatic yeast, photosynthetic bacteria, nitrifying bacteria and other beneficial microorganisms; organic acids, amino acids, digestive enzymes, small molecule biological peptides, unknown growth factors and other active ingredients. Effective microbial content 2 billion CFU/ml.

【Function】

• It has obvious effects on red skin, rotten gills, erect scales, skin ulcers, poor nutritional metabolism, slow growth, weakness and other symptoms in aquatic animals such as fish, shrimp and crab.

• Improve water quality, stabilize water pH, decompose harmful substances such as ammonia nitrogen, nitrite, hydrogen sulfide, leftover bait, feces, etc., reduce ammonia nitrogen, and increase dissolved oxygen in water.

• Promote the absorption of nutrients, promote growth, increase growth rate by 10-20%, improve the quality of aquatic products, and increase production and income.

• Increase immunity of aquatic animals such as shrimp, crab, fish, etc. and reduce the incidence of diseases.

• Improve transportation survival rate.

【How to use】

• Spraying: Each 1000ml is suitable for 2-3 mu of water surface (1-1.5 meters deep), spray the whole pond once every 7 days; double the amount when water quality deteriorates;

• Feeding with bait: Use 1-2kg of this product for every ton of feed. The specific method of use is to first dilute this product with a small amount of water according to the dosage, spray it evenly on the surface of the pellet feed, leave it for 1-2 hours, and then feed it once a day for continuous use.

【Scope of application】

Water purification, bottom purification and bait mixing for various fish, shrimp and crab breeding ponds.

【 Notes 】

• Open the bottle slowly to prevent the bacterial solution from spilling.

• Store in a cool place at room temperature and seal after use.

• You can use this product 3 days after using disinfectant, but do not use disinfectant within 3 days after using this product.

• The white precipitate is a product of fungal metabolism and is normal.

【Shelf life】 12 months

Just use this maintenance water, use bacteria instead of fertilizer, and use fertilizer instead of medicine.

The effect is really good

5. How to breed snails?

Farmers can obtain considerable economic benefits by breeding snails in small water surfaces or rice fields. The following is an introduction to the breeding technology of snails:

1. Selection of snail breeding sites

The snail breeding site should be selected in a place with sufficient water source, good water quality, humus soil and convenient transportation. It is best to have running water.

Construction of breeding pond. The specifications of snail pond are generally 1.5-1.6 meters wide and 10-15 meters long, and can also be based on the terrain. The pond is surrounded by ridges, which are about 50 cm high. Inlets and outlets are opened at both ends of the pond, and nets are installed to prevent snails from escaping. At the same time, aquatic plants such as wild rice stems are sparsely planted in the middle of the breeding pond, which can not only increase the land output rate, but also create a good ecological environment for the growth of snails.

2. Stocking quantity and feeding management

1. The stocking density of snails is generally 100-120 per square meter. At the same time, about 5 silver carp and bighead carp are raised per square meter for the main breeding. The stocking time of snails is generally in March.

2. Fertilization and feeding. First, add some feces to the breeding pond to cultivate plankton to provide food for the snails. The amount of fertilizer depends on the fatness of the bottom of the snail pond. After the snails are put into the pond, feed them with green vegetables, rice bran, fish viscera or vegetable cakes, bean cakes, etc. Chop the green horns and fish viscera and mix them with rice bran and other feeds before feeding. Soak the vegetable cakes, bean cakes, etc. to soften them for the snails to eat. The feeding amount depends on the feeding situation of the snails. It is generally calculated as 1%-3% of the total amount of snails, and feed once every 2-3 days. The feeding time is every morning, and the feeding location does not need to be fixed. Feed is put every other day. When the temperature is below 15℃ or above 30℃, no feeding is required.

3. Water quality adjustment. First, the snail pond should be frequently injected with new water to adjust the water quality, especially in the breeding season. It is best to keep the water flowing, especially in the hot season, and the effect of water culture is better. In spring and autumn, it is better to use micro-flowing water for culture. The depth of the snail pond should be kept at about 30 cm. Second, adjust the pH of the water. When the pH value of the pool water is low, apply 0.15-0.18 kg of quicklime per square meter, and sprinkle it every 10-15 days to keep the pH value of the pool water at 7-8.

4. Management of snails during winter. When the water temperature drops to 8-9℃, snails begin to hibernate. During hibernation, snails use the top of their shells to drill into the soil, leaving only a small round hole on the soil surface, from which bubbles occasionally come out to breathe. Snails do not eat during the winter, but the water depth of the breeding pond still needs to be maintained at 10-15 cm. Generally, water is exchanged every 3-4 days to maintain the appropriate oxygen content.

6. How to cultivate clams in ponds

Clam pond farming technology:

The pond aquaculture area varies according to local conditions. Small ponds are 3 to 5 mu, and large ponds range from more than ten mu to dozens of mu. The water depth is 1.5 to 2 meters. The water quality is generally good and the bait is rich. Grass carp, bream, bighead carp and crucian carp can be mixed in the pond. The stocking density is 100 to 200 per mu. It is not suitable to stock competitive fish such as chain fish or stock very small amounts. Do not stock carnivorous fish such as black carp and black snakehead.

1. Water quality conditions: A water depth of 1.5 to 2.5 meters is more suitable. A certain speed of water flow is extremely important for the growth of pearl oysters and pearl cultivation. Keep the pH value of the pearl breeding water in the range of neutral to slightly alkaline, preferably 7 to 8. Acidic water with a low pH value is not conducive to the growth of pearl oysters and the formation of pearls. It can be adjusted by splashing quicklime water in the pearl breeding water. A high pH value inhibits the growth of pearl oysters, which can be controlled by applying organic fertilizers.

2. Nutrient salts Calcium salts are the most needed salts for pearl oysters. The main component of the mussel shell is calcium carbonate. The growth of pearl oysters and the synthesis of pearls depend on the absorption of calcium. The Ca2+ content in the water body should be kept above 15 mg/L. Calcium sources can be supplemented by applying calcium fertilizers. Magnesium, silicon, manganese, iron, etc. are not only the elements required for the growth of pearl oysters, but also necessary for the growth of their bait organisms. These nutrients can be supplemented by applying organic fertilizers and inorganic fertilizers. Rare earths can promote the secretion of nacre by pearl oysters and accelerate the formation of pearls. Among the rare earth nutrient sources, nitric acid-type rare earths have the best effect and the fastest growth rate of pearls. Rare earth nutrient sources are applied once a month during the peak growth season of pearl oysters to make the pool water have a concentration of 0.1 mg/L.

3. Food organisms The most suitable food organisms for the cumingian oyster are diatoms, golden algae, green algae, and euglena, followed by small zooplankton and organic debris such as bacteria. Therefore, cultivating rich food organisms is crucial for pearl cultivation. The fatness of the water body and the abundance of food organisms can be reflected by the water color. The water color is preferably yellow-green, and the transparency is about 30 cm. The pearl culture water body should be kept in a state of "fat, active, refreshing, and tender".