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Method for increasing culture yield of mudflat shellfish

A shellfish breeding and yield technology, applied in the field of nutrient salt composition, can solve the problems of reducing the growth rate and survival rate of cultured shellfish, uncontrollable microalgae community, etc., and achieve the effects of increasing shellfish breeding output and improving economic benefits.

Active Publication Date: 2013-11-20
霞浦恒巽大来海洋生物科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, shellfish farming is in the primitive breeding stage of "seeing the sea to eat and resigning to fate", and the microalgae community entering the water cannot be controlled
Even under the condition of artificial fertilizer and water, the constructed microalgae community structure is often not the optimal nutrient structure for the cultured shellfish, which greatly reduces the growth rate and survival rate of the cultured shellfish

Method used

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  • Method for increasing culture yield of mudflat shellfish
  • Method for increasing culture yield of mudflat shellfish

Examples

Experimental program
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Embodiment 1

[0017] In 10 only 96m 2 (12m long, 8m wide) In a standard soil pond (marked as 1#-10#) with a drainage gate, 1m of water is inflowed, and the background nutrient level is measured. The inorganic nitrogen is 24.30μmol / L, and the inorganic phosphorus is 0.68 μmol / L, inorganic silicon is 15.30μmol / L, respectively add nutrients to the level in Table 1 (the blank part is the background, no additional addition, nitrogen nutrient is potassium nitrate, phosphorus nutrient is potassium dihydrogen phosphate, silicon nutrient The salt is sodium silicate), and No. 10 pond applied commercial algal culture fertilizer as a control. After 2-3 days on a sunny day, when the algal color deepens and the transparency is lower than 20cm, each pond is put into the seedlings of mud cockles, hairy cockles, green clams and razor clams of the same size and quantity respectively.

[0018] Table 1: The amount of nutrient added in each pond in the experiment (μmol / L)

[0019]

[0020] During the breed...

Embodiment 2

[0025] Shuanghai Aquaculture Farm in Ninghai County, Ningbo City, Zhejiang Province has 1050 mu of seawater ponds, of which 410 mu of razor clam culture ponds are provided according to the fertilizer formula provided by the present invention. The background nutrient level is measured. The inorganic nitrogen is 15.7~26.1 μmol / L, and the inorganic phosphorus 0.52~0.69μmol / L, inorganic silicon 14.1~15.7μmol / L, add urea and potassium nitrate (the molar ratio of the two is 1:1) to make the nitrogen nutrient level to about 100μmol / L, add phosphoric acid Potassium dihydrogen makes the phosphorus nutrient salt to about 10 μmol / L, and sodium silicate makes the silicon nutrient salt to about 30 μmol / L. Cultivate for 3 to 4 days on a sunny day, the pond water presents an obvious yellow-green color, and when the transparency is less than 20cm, put in the razor clam seedlings. During the whole breeding period, supplement 50 μmol / L nitrogen nutrient salt, 5 μmol / L phosphorus nutrient salt a...

Embodiment 3

[0027] Anxiang Aquaculture Farm in Changjie, Ninghai County, Ningbo City, Zhejiang Province has 780 mu of seawater ponds, of which 320 mu of cockle culture ponds are managed according to the fertilizer formula provided by the present invention, and the background nutrient salt level is measured. The inorganic nitrogen is 16.8 to 25.3 μmol / L, inorganic phosphorus is 0.47~0.65μmol / L, inorganic silicon is 13.6~15.2μmol / L, silicon nutrient salt is added to 35μmol / L before seedlings are put in, and the pond water is obviously brown after 3~4 days of cultivation in sunny days. When the color is yellow and the transparency is less than 20cm, put in cockle seedlings. During the whole breeding period, add about 15 μmol / L silicon nutrient salt every 5 to 7 days. When the color starts to turn yellow-green, change the water by 1 / 3 to 1 / 2, and supplement the corresponding silicon nutrient salt according to the amount of water change. During the whole breeding process, most of the time it r...

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Abstract

The invention relates to a method for increasing a culture yield of mudflat shellfish by selectively culturing a pond microalgae community. The method is particularly characterized in that for culture of pond tegillarca granosa and anadara subcrenata, the microalgae community in a pond is selectively cultured to be brown yellow by adjusting water body nutritive salt composition, and for clam and sinonovacula constricta, the microalgae community in the pond is selectively cultured to be yellowgreen by adjusting the water body nutritive salt composition. According to the method, a growth rate of the corresponding mudflat shellfish is obviously higher than that of the mudflat shellfish by the traditional culture, and the culture yield of the corresponding mudflat shellfish in a unit area of the pond can be increased greatly.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and relates to a method for increasing the production of tidal flat shellfish by selectively cultivating the microalgae community in the pond. Specifically, it is a method for adjusting the water body in the seawater culture pond according to the different species of the cultured shellfish. Nutrient composition, the method of selectively cultivating microalgae communities with the best bait effects for shellfish in various tidal flats, thereby greatly increasing the yield of shellfish cultured in ponds. Background technique [0002] In seawater pond culture, the bait of shellfish almost all comes from phytoplankton in the water body. Now due to the eutrophication of the seawater environment, there is no shortage of phytoplankton in the pond, but the ponds in different regions or in the same pond are different. Shellfish growth effects are not the same. This is because the nutritional composi...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 徐继林郑立洋徐善良绍波周海波周成旭严小军
Owner 霞浦恒巽大来海洋生物科技有限公司
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