Method for pearl culture

Abstract

The invention discloses a method for pearl culture. The method comprises the following steps that: firstly, culturing pearl mussels with bead nuclei in a culture pond in a density of 1,000 to 1,200 mussels per mu, wherein the water depth is controlled to be 1.4 to 1.6 meters first; when the water temperature is more than or equal to 10 DEG C, putting live foods in the culture pond according to the standard of 30 to 40 kilograms per mu; pumping water to the culture pond by a water inlet so as to increase the water depth to 1.7 to 1.9 meters; and discharging water in the culture pond by a wateroutlet so as to restore the water depth to be 1.4 to 1.6 meters, controlling the time interval between the water charge starting time and the water discharge ending time to be 8 to 12 days, preferably 10 days, and before the cultured pearl is mature, repeating the water charge-discharge step. The method has the advantages that: the investment risk is effectively reduced, the environmental pollution is reduced, the pearls cultured by the method quickly grow, the efficiency is high, and the pearls cultured by the method are high in brightness and have beautiful appearances.

Description

technical field [0001] The invention relates to cultivation technology, in particular to a method for cultivating pearls in fresh water. Background technique [0002] The existing pearl cultivation method is usually to cultivate pearl-bearing mussels with pearl nuclei in a fixed pool, and to obtain pearls after the pearls are mature; there is another way to use a net to circle one of the water surfaces on the lake. , breeding pearl clams with bead nuclei planted in their bodies. [0003] The main defect of the above-mentioned former culture method is: because the maturing cycle of pearls is longer, usually 5-7 years, in the process of cultivation, it is often necessary to add bait to the pool water, and the pool water itself has no fluidity, so long-term culture is difficult. Finally, the accumulation and accumulation of viruses or harmful bacteria will lead to water quality aging, and even water pollution, which is very unfavorable to the normal growth of pearl mussels, re...

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Problems solved by technology

[0003] The main defect of the above-mentioned former culture method is: because the maturing cycle of pearls is longer, usually 5-7 years, in the process of cultivation, it is often necessary to add bait to the pool water, and the pool water itself has no fluidity, so long-term culture is difficult. Finally, the accumulation and accumulation of viruses or harmful bacteria will lead to water quality aging, and even water pollution, which is very unfavorable to the normal growth of pearl mussels, resulting in slow growth of pearls, and poor gloss and quality of pearls. ; When the water quality declines seriously, it will also lead to a substantial increase in the morbidity and mortality of pearl oysters, which will significantly increase the cost of pearl cultivation

[0004] In the prior art, there is also a method of appropriately replacing the pool water when it is detected that the water quality of the pool water has dropped to the point that it is not suitable for the growth of pearl mussels, for example, there are more cyanobacteria in the water, the dissolved oxygen is reduced, the ammonia nitrogen content is increased, and the water quality is obviously eutrophic. , but after all, this is a passive measure, which cannot completely overcome the above-mentioned defects of unsatisfactory growth rate of pearls; in addition, when the water quality of the pool drops, it will be replaced and discharged, which will also cause pollution to the surrounding environment.

[0005] The main defect of the above-mentioned second breeding method is: although the lake water has a certain fluidity due to natural wind and waves, compared with pond water culture, it is not easy to produce natural accumulation and accumulation of viruses or harmful bacteria, but the lake water quality is affected by the surrounding environment. The impact is very large. In actual operation, it is difficult to effectively control or ensure that the water quality of the lake consistently meets the growth conditions of mussels and pearls. Because the pearl breeding cycle is very long, it usually takes 5-7 years. In chemical culture, the impact of environmental water quality will make the investment risk very high; in addition, there is a major defect in lake culture: when the pearl mussels in some waters are sick, the sick pearl mussels cannot be effectively isolated , so it is difficult to completely cut off the infection of germs, thus further increasing the investment risk

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