Efficient cultivation system and method for tidal flat economic shellfish spat

Abstract

The invention discloses a high-efficiency cultivation system and method for tidal flat economic shellfish juveniles. By constructing a 5-8 mu algae seed pond and a 20±2 mu algae expansion pond, seawater and the algae species therein are introduced, The algal phase of the seawater is observed in the algae pond, which is convenient for the disinfection and fertilization of the seawater in the pond. After microscopic examination of the algae phase, select the appropriate algae phase and then carry out directional expansion cultivation of high-quality algae, carry out fertilizer and water to make it rapidly multiply to a certain scale, and divert 1 / 3 of the seawater that reaches the specified expansion concentration in the algae pond to the expansion pond Expand the culture in the middle, add water again to reach the expansion density again, then repeat the operation of moving the pond for continuous cultivation, and finally lead the water in the expansion pond to the nursery room for feeding and cultivating spat with flowing water circulation to promote the growth and development of shellfish. The method of the present invention can cultivate about 10 billion seedlings with a specification of 1.6 million grains / kg in a seedling room with a cultivation scale of 4-5,000 square meters, thereby saving cultivation cost.

Description

technical field [0001] The invention relates to the field of shellfish culture, in particular to a system and method for efficiently cultivating juveniles of tidal flat economical shellfish. Background technique [0002] At present, the artificial shellfish breeding technology has been studied, but the supply of unicellular algae is extremely unstable, and the protozoa pollution in the algae cultivation pool is frequent, especially after the larvae attach and metamorphose, the bait is seriously insufficient. Defects such as low and extremely unstable seedling emergence. Microalgae are a kind of autotrophic plants that are widely distributed on land and ocean, rich in nutrients and high photosynthetic utilization, and are high-quality bait for shellfish seedlings. But in the process of using it as bait, it is difficult to have fresh microalgae all the time. For the cultivation of traditional bait, unicellular algae such as diatoms, golden algae, and flat algae are generally...

AI Technical Summary

Problems solved by technology

The cultivation method of the prior art has the following defects: 1. There are relatively few types of microalgae, and large-scale cultivation requires certain temperature, salinity and light conditions to limit

2. Sometimes the quality of the algae species is not good. Most of the microalgae in the seawater are in the dead stage, and the algae species are prone to aging. The content of dead algae in the algae species is high and not fresh. The spat rearing cycle is shortened, resulting in slow growth of spat

3. The traditional bait culture method requires the use of various indoor facilities such as triangular flasks, transparent plastic bottles, and large cement pools, which occupy a large area of ​​the nursery room, resulting in high costs for cultivating shellfish seedlings

4. The cultured algae species are single, and shellfish are prone to malnutrition

Therefore, traditional shellfish breeding methods cannot produce large quantities of high-quality seedlings to meet the needs of multiplication and release and artificial breeding

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