Method for rapidly recovering dominant species of vegetation of severely degraded Calamagrostis angustifolia wetland

Abstract

The invention provides a method for rapidly recovering dominant species of vegetation of a severely degraded Calamagrostis angustifolia wetland. The method comprises the following steps: measuring thedegradation degree of the Calamagrostis angustifolia wetland by adopting a coverage index of dominant species of the community, wherein the coverage of the dominant species of a slightly degraded Calamagrostis angustifolia wetland is 50%-70%, the coverage of the dominant species of a moderately degraded Calamagrostis angustifolia wetland is 30%-50%, and the coverage of the dominant species of theseverely degraded Calamagrostis angustifolia wetland is 10%-30%; increasing rhizomes, namely cutting off rhizomes of Calamagrostis angustifolia mechanically, breaking dormancy of rhizome buds of theCalamagrostis angustifolia, and promoting germination of the rhizome buds of the Calamagrostis angustifolia to form a new Calamagrostis angustifolia plant. According to an increasing mode, the rhizomes are increased by cutting machinery; an increasing depth, namely a cutting depth, is 15-20 cm; an increasing line spacing is 20-50 cm, and a separation distance is 20-50 cm; the increasing time is the last ten-day period of April or the first ten-day period of May; the increasing times is one time; and in later maintenance management, when the water content of the recovered wetland soil is lowerthan or equal to 30%, artificial water supplementing is needed to ensure the germination of the rhizome buds of the increased Calamagrostis angustifolia.

Description

technical field [0001] The invention relates to a method for rapidly recovering dominant species of wetland vegetation in heavily degraded Aphrodendron microphyllum based on rhizome multiplication, and belongs to the technical field of degraded wetland restoration methods. Background technique [0002] Wetland is a unique ecosystem formed by the interaction of water and land on the earth. It is the ecological landscape with the richest biodiversity in nature and one of the most important living environments for human beings. It plays an extremely important role in degrading environmental pollution. As one of the areas with the most abundant wetland resources in China, the Northeast region has the characteristics of large area, various types, important locations, and rich biodiversity. It is an important international migration and breeding ground for migratory birds in Northeast Asia. However, due to human activities such as reclamation and drainage, large areas of wetlands...

AI Technical Summary

Problems solved by technology

At present, the restoration of wetlands in Northeast China is mainly based on water replenishment, and the technical means are single and extensive, with poor pertinence and poor restoration effect

There is a lack of targeted wetland vegetation restoration methods based on the characteristics of different wetland vegetation types and combined with the key factors of degraded wetland restoration

Especially the Xiaoyezhang wetland, as one of the most representative wetland types in Northeast China, still lacks mature and applicable vegetation restoration techniques and methods