Spirogyra and attached algae control method based on maintaining of water quality

Abstract

The invention relates to method for suppressing the formation of spirogyra and controlling the increase of biomass of the attached algae, which can be applied to the field of water ecological restoration. The method comprises the following steps: stocking fishes in water in which a submerged plant community structure is built to perform the ecological restoration; launching freshwater mussels within 10 days after the fishes are launched, so that an effect for suppressing the formation of the spirogyra and controlling the increase of biomass of the algae attached to the surface of a submerged plant leaf can be achieved by utilizing an ecological effect of the fishes and the freshwater mussels in the water in the case that the water quality and the underwater light condition are not apparently influenced, so that an lasting and sustainable control effect of the fishes for the algae and spirogyra attached to the plant leaves can be maintained. On the basis of synthesizing the existing biological water purification technologies, the invention achieves the long-term, ecological control of the attached algae biomass to the surface the spirogyra and the plant leaves by stocking fishes and filter-feeding benthos in the system and utilizing the joint action of the fishes and the filter-feeding benthos of the algae biomass.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration, and in particular relates to a method for controlling the formation of Spirogyra and inhibiting the increase of attached algae biomass on the premise of maintaining water quality. Background technique [0002] Water eutrophication is one of the water environmental problems that are widely concerned by countries all over the world. It often leads to the steady-state transition of freshwater ecosystems, that is, to promote the transition from clear water (high transparency, clear water) with submerged plants as the main primary producers to Turbid water state (low transparency, turbid water body) in which phytoplankton are the main primary producers. Therefore, in order to make better use of lake resources, it has become an urgent problem to restore eutrophic lakes to the state before eutrophication. Water bodies with higher coverage of submerged plants generally have higher transpa...

AI Technical Summary

Problems solved by technology

[0003] However, in the practice of ecological restoration with the main technical means of restoring or building a stable submerged plant community structure, attached algae often form a high biomass on the surface of plant leaves, and large areas of spirogyra are easily formed on the water surface. How to control these attached There is no ecological and long-term control technology for the biomass of algae and the inhibition of the formation of Spirogyra

At present, there are three main measures to prevent and control the outbreak of filamentous algae at home and abroad: (1) Physical method: Manual salvage is the most common method. This method is effective and safe, but the operation is difficult and expensive, and the algal filaments are easy Fracture, it is easier to promote its mass reproduction, and cannot fundamentally solve the problem of massive outbreaks of filamentous algae; (2) Chemical methods: mainly inject artificial synthesis or plant extracts into water bodies that have formed large filamentous algae biomass, Such as permanganate, halogen, copper sulfate, hydroxybenzoic acid, camphor tree and willow extract, etc., achieve the purpose of killing algae by destroying algae cells. Although this method is effective, only these chemicals maintain a high concentration in the water body Moreover, the chemical substance itself is toxic, which is likely to cause secondary pollution of the water environment, and may also lead to the demise of submerged plants and affect the water quality of the water body; in addition, chemical methods are generally used for emergency treatment of large-scale Spirogyra outbreaks (3) Biological methods: mainly use the theory of biological manipulation to achieve the purpose of controlling algae, such as snails and invertebrates (chironomus larvae, etc.) feed on attached algae, but so far there is no report on their grazing on filamentous algae, and there is a lack of long-term ecological control technology for filamentous algae and attached algae biomass

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