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Prawn nursery pond and method for growing seedlings of prawn which is applied to prawn nursery pond

A technology for raising seedlings and prawns, which is applied to the fields of prawn seedlings and prawn seedlings, can solve the problems of inhibiting the growth and development of shrimp seedlings, slow growth in the growing stage of shrimps, and pollution of coastal waters by seedling sewage, so as to improve the survival rate of seedlings and improve the survival rate of shrimp seedlings. Low coefficient of variation and the effect of maintaining the water environment for seedlings

Active Publication Date: 2017-05-31
宁波华大海昌水产科技有限公司
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AI Technical Summary

Problems solved by technology

The natural light intensity should be in the range of 100,000–180,000 lux in normal sunny days, even in cloudy and rainy days, the illuminance is above 20,000 lux. The current domestic and foreign Litopenaeus vannamei nursery models basically do not use natural light, which is a great waste of natural light energy.
[0006] 3. Industrialized seedling cultivation requires boiler heating, blower aeration to increase oxygen, workshop cleaning and disinfection, etc., which consumes a lot of power and energy, and the production cost of seedling cultivation is high
[0007] 4. Indoor industrial seedlings are mainly fed with artificial compound feed. The water quality of the seedling pool is seriously polluted, and harmful substances such as ammonia nitrogen and hydrogen sulfide exceed the standard, which not only inhibits the growth and development of shrimp seedlings, but also pollutes the coastal sea area with the discharged seedling sewage, causing a vicious circle.
Due to the increasingly serious pollution of coastal waters, the survival rate of the existing industrialized seedlings has been declining year by year. At present, the average survival rate of domestic seedlings is below 30%, and the quality of shrimp seedlings is declining simultaneously. , frequent disease
[0008] 5. Most of the existing prawn seedlings are fed with exogenous biological bait, such as feeding artificially cultured Chaetoceros and Thalassiosira in the early stage of seedlings. The cultivation process of these two algae is complicated and the cost is high. It is not easy to survive, but pollutes the water quality of seedlings
In addition, in order to meet the animal nutritional needs of shrimp seedlings, Artemia larvae are basically fed in the later stage of nursery, but Artemia larvae are more expensive

Method used

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  • Prawn nursery pond and method for growing seedlings of prawn which is applied to prawn nursery pond
  • Prawn nursery pond and method for growing seedlings of prawn which is applied to prawn nursery pond
  • Prawn nursery pond and method for growing seedlings of prawn which is applied to prawn nursery pond

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Build an open-air nursery pool with an area of ​​3,000 square meters. The bottom of the pool is muddy. The depth of the nursery pool is 3.5 meters, and the water depth is 3 meters. The nursery pool is rectangular.

[0040]After the seawater is filtered and sterilized, it is added to the seedling pond. After the residual chlorine disappears, 30,000 golden algae / ml and 150,000 chlorella / ml are inoculated, and then the whole pond is sprinkled with organic fertilizer, which contains lactic acid bacteria, bacillus and Yeast, the total number of effective bacteria is more than 150 million / ml, the fertilization concentration is 8g / t, and the beneficial fungi and beneficial algae are cultivated in a targeted manner. After the biological water quality control and stabilization of the seedling water environment, 240 million tails (80,000 tails / m 2 ) prawn nauplii. After the nauplii opened their mouths, feed Brachionus rugosa rotifers at the zoa stage, keeping the density of roti...

Embodiment 18

[0063] The difference from Example 1 is that when the weather is relatively cold, the natural water temperature of the nursery pond is lower than 25°C, and a greenhouse covered with a transparent plastic insulation film is erected above the nursery pond to increase the water temperature. The area of ​​the nursery pool is 1500 square meters, and the bottom of the pool is covered with black plastic film. The depth of the nursery pool is 3.6 meters, and the depth of the nursery water is 3.3 meters. The stocking amount of prawn nauplii is 150 million (100,000 / m 2 ), when the larvae developed to P5-6 (Phase 5-6), after passing the inspection, 94.65 million shrimp seedlings were harvested, with an average seedling survival rate of 63.1%, shrimp seedling size of 0.74cm, and a coefficient of variation of 5.5%. The top of the nursery pool of the present invention can be provided with a greenhouse covered with a transparent plastic thermal insulation film. On the one hand, it retains an...

Embodiment 19

[0065] The difference from Example 1 is that the area of ​​the nursery pond is 2800 square meters, and the bottom of the pond is covered with sand. The depth of the nursery pond is 3.1 meters, and the water depth of the nursery is 2.7 meters. m 2 ), when the larvae developed to P5-6 (Phase 5-6), after passing the inspection, 90.3 million shrimp seedlings were harvested, with an average seedling survival rate of 64.5%, shrimp seedling size of 0.72cm, and coefficient of variation of 5.4%.

[0066] In summary, a prawn nursery pond of the present invention is different from traditional cement ponds. It adopts sandy, muddy or black plastic film bottoms, makes full use of natural light, cultivates basic biological bait, and better regulates the water quality of the nursery ponds. , maintain a good water environment, and provide nutrients for shrimp larvae, meet the physiological and ecological needs of the growth and development of prawn larvae, promote the control of healthy growth...

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Abstract

The invention discloses a prawn nursery pond and a method for growing seedlings of the prawn which is applied to the prawn nursery pond. The prawn nursery pond is outdoor and open, the bottom of the prawn nursery pond is sandy , argillaceous or is laid with a black plastic film. The method for growing seedlings of the prawn comprises the steps of adopting the prawn nursery pond; inoculating golden algae and chlorella before a larva opens the mouth, and utilizing pure natural light to cultivate the algae; putting nauplius of the prawn into the nursery pond after the water quality if the nursery pond is stable; feeding rotifera in the phases of zoea and mysis after the nauplius opens the mouth; feeding the rotifera and moina Mongolica daday in post larvae phase; harvesting prawn seedlings when the post larvae grows to 4-6 periods. By utilizing the nursery pond and the method to cultivate the seedlings of the prawn, the growth of the larva is synchronized, the variable coefficient of the prawn seedlings is small, the specification is orderly, the survival rate is high, the cultivating speed is high, the cultivating cost is low, and the nursery pond and the method are beneficial to popularization in various regions.

Description

technical field [0001] The invention relates to the technical field of prawns, in particular to a prawn nursery pond and a prawn nursery method using the same. Background technique [0002] In 1989, the Fisheries Department of the Ministry of Agriculture promulgated the "Technical Operation Specifications for Shrimp Industrialized Shrimp Seedlings in China", which required promotion in all coastal provinces and cities across the country. The industrialized prawn seedlings in China have been used until now. Later, with the introduction and promotion of Litopenaeus vannamei, on September 30, 2014, the General Administration of Quality Supervision, Inspection and Quarantine and the National Standardization Management Committee jointly issued the standard number GB / T30890-2014 "Technical Specifications for Litopenaeus vannamei Seedlings" , requiring nationwide promotion from March 1, 2015. [0003] The present prawn breeding method mainly has the following problems: [0004] 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K63/00A01K61/59A23K10/20A23K10/30A23K50/80C05F11/08
CPCA01K63/00C05F11/08Y02A40/81
Inventor 丁茂昌
Owner 宁波华大海昌水产科技有限公司
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