Mussels can usually grow about 1-2 pounds in 1 year, and factors such as farming methods, farming conditions, and management styles will all have an impact on their weight. Mussel farming needs to ensure that the water source is sufficient and pollution-free, the transparency of the water to about 30 cm is appropriate, the water surface requires more than 6,000 square meters, if the area is too small, the water quality is prone to large changes, which in turn affects the growth of mussels.

First, mussels can grow how big a year

1, mussels 1 year long how many pounds

In general, mussels 1 year can grow 1-2 pounds or so, but due to the breeding methods, farming conditions, management and other factors, mussels can be grown to how many pounds depending on the actual situation.

2, mussel farming conditions

(1) water

① water should ensure that adequate, non-polluting, toxic substances can not exceed the fishery water quality standards, water transparency to 30 centimeters as the standard.

② The appropriate PH value is 7-8, the appropriate water temperature is 18-28 ℃, the appropriate depth of 1.5-4 meters, 2-3 meters, the depth of water is less than 1 meter, higher than 5 meters are not suitable for aquaculture.

③ The water surface requires more than 6000 square meters, if the area is too small, the water quality is unstable and prone to large changes, resulting in the growth of mussels affected.

④ It is recommended that mussels be cultured in waters with a flow rate of no more than 0.1 meters. If mussels are cultured in rivers and lakes with flowing water and other good conditions, each mussel can generally produce 5-8 grams of pearls in 1 year of culture, and if they are cultured in static waters, it generally takes about 3 years for each mussel to produce 5-8 grams of pearls.

(2) light

① light can produce thermal effects when sufficient, for pearl mussels and their bait organisms to provide energy.

② The dissolved oxygen content in the water will increase when there is enough light, and it can promote the movement of the water column and the transfer of heat, but also affect the color and luster of the pearl.

(3) soil

The suitable soil for pearl-breeding waters is clay, followed by river soil, loess, sandy soil is poor, and the bottom of the water should also have a moderate amount of silt.

(4) Dissolved Oxygen

① Summer: the dissolved oxygen content in the water should be more than 5 mg / liter.

② Winter: the dissolved oxygen content in the water should be more than 3 mg / liter.

(5) substance content

① to create pearls and pearl mussels shells are mainly composed of calcium, so the content of inorganic salts in the water body should be calcium ions, the requirements of the calcium content of more than 10 mg / liter, if the calcium content is low, you can splash lime.

② Algae can not grow without nitrogen, but if the nitrogen content is greater than 2 mg / liter, it means that the water body has been seriously polluted, at this time the growth of mussels will be affected to a certain extent, and in severe cases will also reduce its survival rate. If the nitrogen content is less than 0.1 mg / liter, it means that the water quality is too thin, it is difficult to meet the demand for natural bait proliferation.

③ The nitrite content in the water body should not be greater than 0.1 mg/liter, otherwise slow growth of mussels, dead mussels, etc., can generally be controlled in the nitrite content of 0.01-0.1 mg/liter.

④ The aquatic vascular plants, shrimps, crabs and other hostile organisms can not appear in the aquaculture waters to prevent the growth of mussels from being affected.

Second, mussel farming methods

1, site selection

Generally in lakes, reservoirs, ponds, ditches and harbors, outside the swings, rivers and other waters (which can meet the mussel farming conditions) to start breeding.

2, culture

(1) Hanging culture: can be divided into single hanging and string culture, string culture is more than 2 mussels hanging on a line.

(2) cage culture: the number of culture according to the size of the cage (mesh cage, mesh clip) to decide, need to ensure that each mussel can touch the bottom of the cage.

3. Cultivation density

In the case of conventional aquaculture, the appropriate density of mussels is 800-1200 mussels/mu, and 600-800 mussels/mu in the outer swings, which can be adjusted according to the mussel's body weight and fatness, the speed of the water flow, the depth of water body and other factors to the breeding density.

4, management

(1) post-surgery temporary management

① The post-surgery mussels are temporarily housed in fresh water (micro-flow), let them recover for 15-30 days, during which the mussels can not be turned over at will, and can not be allowed to leave the water or open the shell to check, to prevent the recovery rate and bead capsule formation is affected.

② After 30 days, check the restoration mussels, remove the dead mussels, the remaining mussels can be re-hanging to the bead culture waters. If the transparency of the water is less than 30 cm, the fertilizer can be reduced.

(2) Strengthen the water injection and oxygenation work

In the closed, static waters mussels, mussels in high temperature, shallow water, low pressure and other conditions are prone to hypoxia, dead mussels, so it is necessary to change the water in a timely manner, add water, or to maintain the freshness of the water quality and sufficient oxygen content, to prevent the lack of oxygen in the low oxygen conditions affecting the growth of mussels in the bead culture.

(3) timely adjustment of the depth of hanging

According to the water temperature, water level, seasonal changes in the hanging depth of mussels to make appropriate adjustments. Winter and summer, generally suitable for deep hanging, depth of 40-60 cm appropriate; spring and fall, generally suitable for shallow hanging, depth of 15-20 cm appropriate.

(4) water fertilization

① If the water quality is too thin, you can apply chemical fertilizers or organic fertilizers, which can also be used at the same time. You can also splash soybean milk (feed and fertilizer) with calcium fertilizer, such as quicklime. If the PH value is low, you can apply more, if the PH value is high, you can reduce the amount of application.

② fertilizer to urea, calcium superphosphate-based, the appropriate ratio of 1:2 or 1:3, mixing water can be sprinkled, the use of the principle of a small number of times, less often, less hard to apply, the dosage of 1 kg / mu.

③ Organic fertilizer is suitable for use with chicken, duck, bird manure, before use, need to add quicklime, fermentation, to ensure that fully rotted before use.

(5) Removal of attachments

Regularly clean the attached mud and organisms (such as polyps, freshwater sponges, algae, etc.) on the mesh bags, mesh cages, and mussels, and can be shabu-shabu every one month during the period of April-October.

(6) Maintenance of aquaculture facilities

Regular maintenance of aquaculture facilities to prevent unnecessary economic losses.