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Method for improving growth of seedlings of hizikia fusiformis

A technology for hijiki and seedlings, which is applied in the field of hijiki culture, can solve the problems of high pH, ​​low TIC concentration, photosynthetic rate and biomass decline of hijiki seedlings, etc., so as to improve the growth rate, increase the yield, and facilitate the growth of hijiki. The effect of large-scale agricultural production

Active Publication Date: 2019-08-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to factors such as high-density cultivation and slow water exchange in the bay area, low TIC concentration and high pH often occur in the sea area where seaweed is cultivated, which reduces the photosynthetic rate and biomass of hijiki seedlings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Select a seedling pond with a volume of 200L, a length of 100cm, a width of 50cm, and a depth of 40cm, and put 180 liters of natural seawater into it as a breeding area for Hijiki seedlings (young sporophytes). The young sporophytes are derived from sargassum plants with a length of 3-6 cm in breeding culture.

[0042] (2) The culture density of hijiki seedlings was 10 g / L. Air (CO 2 The concentration is 390 μL / L) to stir the seawater, and the rate of pumping air to stir the seawater is 500mL / min, pumping the air to stir the seawater continuously until the end of the culture.

[0043] (3) Test the total alkalinity, pH value, salinity, temperature, and nutrient concentration of the seawater in the nursery pond, and use the CO2SYS software to calculate the concentration of inorganic carbon; the total alkalinity of the seawater is 2.3, the pH value is 8.1, and the salt The degree is 30, the temperature is 20°C, and the nutrient NO 3 - and PO 4 - The concentration...

Embodiment 2

[0050] (1) Select a seedling pond with a volume of 200L, a length of 100cm, a width of 50cm, and a depth of 40cm, and put 180 liters of natural seawater into it as a breeding area for Hijiki seedlings (young sporophytes). The young sporophytes are derived from sargassum plants with a length of 3-6 cm in breeding culture.

[0051] (2) The culture density of hijiki seedlings was 10 g / L. Air (CO 2 Concentration of 390 μL / L) to stir seawater, pump air to stir seawater at a rate of 400mL / min, pump air to stir seawater continuously until the end of the culture.

[0052] (3) Test the total alkalinity, pH value, salinity, temperature, and nutrient concentration of the seawater in the nursery pond, and use the CO2SYS software to calculate the concentration of inorganic carbon; the total alkalinity of the seawater is 2.3, the pH value is 8.1, and the salt The degree is 30, the temperature is 20°C, and the nutrient NO 3 - and PO 4 - The concentrations were 200 μmol / L and 25 μmol / L,...

Embodiment 3

[0059] (1) Select a seedling pond with a volume of 200L, a length of 100cm, a width of 50cm, and a depth of 40cm, and put 180L of natural seawater into it as a breeding area for hijiki seedlings. The young sporophytes are derived from sargassum plants with a length of 3-6 cm in breeding culture.

[0060] (2) The seaweed culture density is 10 g / L. The sea water is changed every 2 days, and the air (CO 2 concentration of 390 μL / L) to stir the seawater.

[0061] (3) Test the total alkalinity, pH value, salinity, temperature, and nutrient concentration of seawater in the nursery pond, and use CO2SYS software to calculate the concentration of inorganic carbon; the total alkalinity of seawater is 2.4, the pH value is 8.0, and the salt The temperature is 30°C, the temperature is 20°C, and the nutrient NO 3 - and PO 4 - The concentrations were 200 μmol / L and 25 μmol / L, respectively, and the CO2SYS software calculated the concentration of inorganic carbon as 2.2.

[0062] (4) We...

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Abstract

The invention discloses a method for improving growth of seedlings of hizikia fusiformis. The method comprises steps as follows: seawater is added to a nursery pond of juvenile sporophyte of the hizikia fusiformis, the total alkalinity, the pH value, the salinity, the temperature and the nutrient substance concentration of the seawater are tested, and the concentration of TIC (total inorganic carbon) is calculated; a sodium bicarbonate solution is added to the culture pond, the concentration of TIC in the seawater is calculated again, and whether sodium bicarbonate is required to be continuously added is observed. Used sodium bicarbonate is low in cost, safe and easy to obtain, and large-scale agricultural production is easy to implement; sodium bicarbonate is added to change the composition of a carbonate system of the culture seawater, the concentration of TIC in the culture seawater is increased, the method is simple and convenient to operate, the growth speed of the seedlings of hizikia fusiformis is safely and effectively increased, time is saved for follow-up cultivation of the hizikia fusiformis, and output of the hizikia fusiformis is favorably increased. The provided method for improving growth of the seedlings is higher in implementation and has certain practical significance in the large-scale hizikia fusiformis culture industry of offshore areas in China.

Description

technical field [0001] The invention belongs to the field of hijiki cultivation, and in particular relates to a method for improving the growth of hijiki seedlings. Background technique [0002] Hizikia fusiformis is a warm temperate seaweed widely distributed along the coasts of China, the Korean Peninsula and Japan. Hijiki has high application value in marine ecosystem restoration, edible raw materials and seaweed industry, and is an important large economic brown algae. There has been a certain scale of aquaculture production in Zhejiang, Fujian and other places in my country. In 2013, the farming area of ​​hijiki in my country reached 1390 hm 2 , the output of fresh algae is 15,000 tons, accounting for 9.3% of the total output of seaweed farming in my country. Macroalgae photosynthesize and grow by absorbing inorganic carbon in seawater carbonate system. Inorganic carbon (totalinorganic carbon, TIC) in seawater mainly exists in three forms (CO 2 、HCO 3 - and CO 3 ...

Claims

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Application Information

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IPC IPC(8): A01G33/00
CPCA01G33/00
Inventor 邹定辉龚静雨王龙乐姬治委
Owner SOUTH CHINA UNIV OF TECH
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