Method using scratching fish and periphyton for combined control of lake eutrophication

Abstract

The invention discloses a method using scratching fish and periphyton for combined control of lake eutrophication. The method comprises the steps of investigating the quantity of periphyton in a lake, arranging artificial substrates, selecting scratching fish, fishing scratching fish and the like. According to the method, by utilizing the characteristic that periphyton has high absorptivity for nitrogen and phosphorus in a water body, the artificial substrates are arranged to enlarge the quantity of periphyton in the water body so as to increase the amount of absorption and conversion of nitrogen and phosphorus in the water body, and as the baits of scratching fish are exactly periphyton on various substrates, the fishery productivity of the water body can be improved by breeding a certain quantity of scratching fish which has the feeding habit characteristic of being capable of scratching periphyton on various substrates; meanwhile, the concentration of nitrogen and phosphorus nutrient substances in the water body can be reduced, so that the method not only has ecological efficiency, but also brings certain economic benefits. Therefore, the effect of comprehensive optimization of ecological efficiency and economic benefits is achieved.

Description

technical field [0001] The invention relates to a method for jointly controlling eutrophication of lakes by utilizing scraping fish and surrounding organisms. Background technique [0002] With the continuous development of my country's economy, a large number of external pollution sources have entered the lake, resulting in an increase in the concentration of nutrients such as nitrogen and phosphorus in the water body, and excessive growth of plankton, resulting in varying degrees of eutrophication in the lake water body. How to better control and manage the eutrophication of water bodies and ensure the sustainable development of lake fishery functions has gradually become a focus of attention. Since the ecological restoration technology has no by-products, it has received more and more attention. For the sustainable development of my country's water environment, ecological restoration technology has been adopted in various places to curb the deterioration of the water envi...

AI Technical Summary

Problems solved by technology

At the same time, in most small shallow lakes, its primary productivity may exceed that of phytoplankton, and it is one of the important sources of food for aquatic animals, especially scraping fish. Some scholars have also begun to pay attention to the role of periphytons in ecological governance. However, only the characteristic that the periphyton can absorb a large amount of N and P nutrients in the substrate and water during the growth process is used, and the characteristic that it is an important source of bait for scraping fish is ignored

From the perspective of how to use the surrounding organisms to absorb the substrate and N, P nutrients in the water body, and the ecological chain in which the scraping fish use the surrounding organisms as bait to control the eutrophication of the lake, and at the same time produce the optimal comprehensive benefits, there is no precedent