Biological chain constructing method suitable for improving water quality of shallow lake

Abstract

The invention relates to a biological chain constructing method suitable for improving the water quality of a shallow lake. In the method, biological combinations of different trophic levels are configured optionally, a shrimp-fish-shellfish-submerged plant biological chain with the ecological functions of reducing nutrient salt and controlling the growth of algae is constructed, and the water quality regulating and controlling functions of biological components are brought into full play on different levels. Through absorptive utilization and metabolic activity of nutrient elements, the nitrogen and phosphorus levels the lake are lowered effectively, the transparency of an aquatic plant growing region is increased, and the water quality is improved. The biological chain constructing method has the characteristics of economic efficiency, convenience, low energy consumption, remarkable water purifying effect, good economic benefit and short treatment period, and plays an important role in maintaining the health of a shallow lake ecological system for a long time.

Description

[0001] technical field [0002] The invention belongs to the field of ecological environment restoration, and relates to a biological chain construction method for improving the water quality of shallow lakes, in particular to a method for jointly regulating the water quality of shallow lakes by using organisms of different trophic levels. Background technique [0003] There are many types of lakes in my country and they are widely distributed, with a total of 1 km 2 There are 2,759 lakes above, with a total area of ​​91,019 km 2 , accounting for 0.95% of the country's land area, about one-third of which are freshwater lakes, and are mainly distributed in the eastern coastal areas and the middle and lower reaches of the Yangtze River. In recent years, with the rapid economic development, inappropriate development and utilization of lake resources, and the intensification of agricultural non-point source pollution, the problem of lake pollution has become very serious: most ...

AI Technical Summary

Problems solved by technology

However, the current biological regulation technology often emphasizes the use of the ecological function of a certain trophic level of the aquatic biological community, while ignoring the regulation function of the entire biological chain, which is a relatively independent unit, on water eutrophication.