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Water depth regulation and control method in gracilaria pond cultivation

A technology for aquaculture water and water depth adjustment, applied in the fields of botanical equipment and methods, climate change adaptation, horticulture, etc., can solve problems such as unfavorable growth of gracilis, achieve the effect of improving yield and economic benefits, and maintaining rapid growth

Inactive Publication Date: 2014-05-28
THIRD INST OF OCEANOGRAPHY STATE OCEANIC ADMINISTATION +1
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Problems solved by technology

[0004] The growth rate of Gracilaria has a great relationship with the light intensity. Too low light intensity will slow the growth of Gracilaria, and too high light intensity will also inhibit the growth of Gracilaria, which is not conducive to the growth of Gracilaria.

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  • Water depth regulation and control method in gracilaria pond cultivation
  • Water depth regulation and control method in gracilaria pond cultivation

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Embodiment Construction

[0031] Embodiments of the present invention include the following steps:

[0032] 1. Environmental conditions in the breeding area

[0033] Gracilaria culture is bottom-sowing culture and cultured in closed culture ponds. It is best to choose a breeding area in an area where land-source fresh water is discharged, and the salinity of the incoming seawater is between 15 and 32, preferably between 20 and 25; the nutrient concentration in the seawater is preferably high, and the water body is relatively transparent , the content of suspended solids and phytoplankton in the water is low.

[0034] 2. Selection of breeding ponds

[0035] Gracilaria breeding ponds should choose areas with good drainage conditions, which can be naturally drained during high and low tides, and the water level of the breeding ponds can reach 0.8-1.2m after natural water intake during high tides; natural drainage during low tides can empty the water in the ponds. The airtightness of the inlet and outle...

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Abstract

A water depth regulation and control method in gracilaria pond cultivation relates to large-sized algae cultivation. The method comprises the steps of selection of a cultivation area; selection of a gracilaria cultivation pond; gracilaria cultivation; regulation and control of cultivation water depth; water depth control in sunny days and rainy days, after fertilization and on microalgae. The method can ensure that light intensity of a gracilaria growth water layer is positioned in the light intensity having larger growth rate at the most time, and gracilaria can obtain sufficient light energy for photosynthesis; the gracilaria is enabled to fast grow under the condition of ensuring the sufficient nutrition and the yield and economic benefits of the gracilaria are improved. The growth rate of the gracilaria is improved by adjusting the proper growth light intensity and sufficient nutrition. If the day average growth rate of the gracilaria is improved by 4%, the harvesting time can be shortened by 18 days from the original 25 days, the harvesting times are improved to 8 from 6 according to the growth time of 5 months, and the yield is improved to be more than 4ton per mu from 1.5-3ton per mu, namely the yield is improved by 30-167%.

Description

technical field [0001] The invention relates to large seaweed cultivation, in particular to a water depth control method in pond cultivation of Gracilaria. Background technique [0002] Gracilaria lichevoides is a large red algae native to Taiwan and introduced to Fujian in the 1990s. It mainly grows in aquaculture ponds. The growing season is mainly from summer to autumn. It is the most important fresh bait for abalone in summer and autumn. Has good economic value. In recent years, with the continuous expansion of the scale of abalone farming, the production of Gracilaria chrysanthemum is in short supply. [0003] Gracilaria adopts bottom sowing culture and asexual reproduction. At the beginning, a certain amount of Gracilaria seedlings were sown to the bottom of the culture pond, a part of Gracilaria was harvested after a certain period of time, and the other part was kept as seedlings to continue breeding. [0004] The growth rate of Gracilaria has a lot to do with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G33/00
CPCY02A40/80
Inventor 汤坤贤汤朴毅郑金平彭孝干宋晖涂武林
Owner THIRD INST OF OCEANOGRAPHY STATE OCEANIC ADMINISTATION
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