Method for removing green alga in nori cultivation process

Abstract

The invention relates to a method for restraining green alga growth, in particular to a method for removing green alga in the nori cultivation process. Firstly, algaecide is prepared, wherein solid sodium percarbonate is dissolved in deionized water, so that sodium percarbonate treating fluid is prepared, and the pH value of the treating fluid is between 9 and 10; the prepared algaecide is directly sprayed on green alga bodies attached to a net curtain, a whole raft frame and a whole mooring rope in the nori cultivation process 2 hours before a flood tide and the algaecide is sprayed once every 1 to 3 months. According to the method for removing the green alga in the nori cultivation process, the sodium percarbonate serves as the algaecide and is free of toxin, odor and pollution, high in water solubility, convenient to prepare, free of harm to the environment and free of biological accumulation. The method for removing the green alga in the nori cultivation process is very simple and convenient to achieve, the use cost is low, rinse is not required, and the method is slightly influenced by natural conditions and can be used in a large scale. Three days later after the algaecide is sprayed, the removal rate of the green alga is 100%, and the growth of the nori is not influenced.

Description

technical field [0001] The invention relates to a method for inhibiting the growth of green algae, in particular to a method for removing green algae in the laver cultivation process. Background technique [0002] Seaweed cultivation has a long history in my country, and it is one of the traditional and representative industries in China's aquatic product farming industry. The industry scale is second only to kelp among algae. The share of China's laver farming industry in the world's laver market continues to rise, especially in the late 1990s, showing a significant growth trend. In 2000, China surpassed Japan and became the world's largest laver farming country. In 2009, my country's laver breeding It accounts for 65% of the world's total breeding, which is an increase of 54% compared with the initial breeding in 1971. [0003] The growth cycle of laver is divided into four stages: seedling raising, seedling picking, net culture (putting into the sea area) and harvesting. ...

AI Technical Summary

Problems solved by technology

Hydrochloric acid is harmful to the environment and can cause pollution to water bodies and soil. Low concentrations of hydrochloric acid can also kill marine phytoplankton and destroy ecological balance. Hydrochloric acid is a dangerous chemical, and there are environmental risks during storage.

Although the patent pointed out that acid treatment can remove 90% of green algae, it will have a greater impact on laver, and the laver fronds will become smaller and yellow, which will affect the quality of laver

Equally, this method also cannot prevent green algae from continuing to grow after the net curtain is put into the sea area

[0007] In seaweed cultivation, pesticides containing plant growth inhibitors are usually used to remove green algae. Pesticides are not only a type of biologically active substance, but also a type of chemically active substance. Composition and changes cause a certain impact, or interact with some other substances or objects in the environment, diffuse and distribute in a specific environment, and cause adverse consequences to the benign development of the ecosystem

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