Method for carrying out ecological restoration on northern landscape water by using water spinach

Abstract

The invention provides a method for carrying out ecological restoration on northern landscape water by using water spinach. The method comprises the following steps: (1) arranging a floating bed device in the landscape water to be restored, wherein plant cutting rings are arranged on the floating bed device; (2) cutting stems of the water spinach into the plant cutting rings; (3) harvesting the water spinach periodically. According to the method, the water spinach effectively absorbs contaminants such as nitrogen and phosphorus from the water by virtue of a dense fibrous root network formed underneath water surface, so as to achieve the aim of carrying out ecological restoration on contaminated water. According to the method, the southern aquatic plant, i.e., the water spinach is successfully introduced into the decontamination of the northern landscape water, and the problems of the traditional northern ecological floating beds that aquatic plants are low in purification efficiency and difficult in cultivation, floating beds are high in construction cost and complicated in construction, secondary pollution is caused, and the like are solved by using simple floating beds and depending on the characteristic that the water spinach can independently float and sprawl on the water surface; and meanwhile, through periodically harvesting and selling the water spinach, economic benefit can be obtained.

Description

technical field [0001] The invention relates to a method for restoring water bodies, in particular to an ecological restoration method for landscape water bodies. Background technique [0002] Landscape water bodies in northern cities include small urban rivers, lakes, ponds, streams, and artificial pools in parks. Most of them are closed slow-flowing water bodies that are static or poorly mobile, with poor self-purification ability and are easily polluted. If the management is not good, it will cause eutrophication of the water body, black, smelly and other phenomena, loss of landscape ability, and seriously affect the urban environment and people's lives. As the landscape water body is limited by practical problems such as difficult construction and high requirements for landscape protection, many conventional sewage treatment technologies cannot be applied. [0003] Ecological floating bed is an effective in-situ ecological restoration technology for water bodies. Throug...

AI Technical Summary

Problems solved by technology

Due to the cold winter, low temperature, freezing water surface, and difficult growth of plants in northern cities, many researchers and industry experts have not conducted in-depth research on the applicable conditions and applications of ecological floating beds in northern cities, thus limiting the application of ecological floating beds in northern cities and promotion

[0004] So far, studies have shown that reeds, cannas, chrysanthemums, calamus, water hyacinths, dry umbrella grass, rushes, water spinach, cress, etc. can be used as ecological floating bed plants, but after practical engineering tests, it is found that some Plants are mainly ornamental, some plants show slow effects, some plants are difficult to achieve continuous and efficient restoration of polluted water bodies, some plants have low economic value or high recycling costs, or fail to realize resource utilization after removal

In addition, limited by planting methods, growth environment, and plant growth cycle in the northern region, there has been no substantial progress in the promotion and application of these plants in large areas.

Images