Method for remediating eutrophicated surface water all year round by virtue of seasonal aspect plant crop rotation technology

Abstract

The invention provides a method for remediating eutrophicated surface water all the year round by virtue of a seasonal aspect plant crop rotation technology. The method comprises the steps of performing seasonal aspect plant crop rotation in engineering measures for remediating the eutrophicated surface water according to growth characteristics of remediation plants in the most suitable climate, specifically planting one or more of thalia dealbata, canna and water lettuce in summer and autumn, planting one or more of ryegrass, hydrocotyle verticillata and water fennel in winter and spring, and constructing a greenhouse on the plants; regularly harvesting the remediation plants, specifically harvesting the thalia dealbata, the canna and the water lettuce by adopting a plant and seedling division process, keeping the plant coverage rate of 60%-80%, harvesting the ryegrass, the hydrocotyle verticillata and the water fennel by adopting a clipping process, and keeping the plant height of 20cm to 50cm. According to the method, the problem of poor growth of the remediation plants caused by season change is solved, and the secondary pollution caused by dry branches and fallen leaves of the remediation plants is effectively prevented.

Description

technical field [0001] The invention relates to the technical field of water environment ecological management, in particular to a method for repairing eutrophic surface water throughout the year using plant seasonal rotation technology, which is mainly used in restoration engineering measures of eutrophic water bodies such as artificial ecological wetlands and ecological floating islands , to achieve the purpose of efficiently restoring eutrophic surface water throughout the year. Background technique [0002] The eutrophication of water body is one of the most prominent problems in the current water environment. Especially for water-deficient China, water eutrophication has exacerbated water quality and water shortages, and destroyed the ecological stability of the water environment. With the development of the economy, human beings demand more and more natural resources, and the production behavior of high energy consumption and high material consumption regardless of th...

AI Technical Summary

Problems solved by technology

Although the current phytosystematic restoration has been widely used in the treatment of eutrophic water bodies, due to the technical defects of cultivation and management, its restoration efficiency and ecological landscape have been affected.

The main manifestations are: first, the repaired plants are in the withering period in winter and spring when the temperature is relatively low, and the lack of seasonal crop rotation technology causes the repaired plants to lose green in winter and spring, and cannot achieve the effect of repairing eutrophic water bodies throughout the year; There is no facility protection technology in winter and spring, which not only reduces the number of overwintering restoration plants that can be selected in winter and spring, but also seriously affects the growth of some overwintering restoration plants, which in turn affects the restoration efficiency and ecological landscape in winter and spring; the third is the traditional The management of restoration plants is relatively extensive, especially the restoration plants are only harvested once a year, which not only cannot promote the vegetative growth of restoration plants, but also causes secondary pollution if the management of litter is not timely