A method for recovering woody plants on a fly ash stockyard

Abstract

The invention discloses a method for recovering woody plants on a coal ash storage yard. The method includes the steps that pyrite is used as coal ash storage yard alkali buffering agents to reduce the alkalinity of the coal ash storage yard, and lichen and moss are introduced into the coal ash storage yard to improve the plant growth condition of the coal ash storage yard; when the alkali buffering agents are applied and the lichen and the moss are introduced for one week to three weeks, cuttage or transplant of willows is conducted on the coal ash storage yard; watering and daily maintenance are conducted on the willows regularly. According to the method, the pyrite is adopted to buffer the alkali harmfulness of the coal ash storage yard, the pioneer species are evolved to improve the plant growth condition of the coal ash storage yard, and large woody plants are recovered directly and quickly on the coal ash storage yard. The method is simple, convenient and fast to operate and construct, low in cost, high in efficiency, quick in effect achievement, easy to manage and free of special later management and maintenance. By means of the method, dust raising and rain washing of the coal ash storage yard can be controlled obviously, the stability of the whole storage yard can be improved effectively, large vegetation types can be increased, ecological system succession of the storage yard is promoted, and the stability of the ecological system recovery is maintained effectively.

Description

technical field [0001] The invention relates to the technical field of ecological restoration of abandoned industrial and mining lands, in particular to a method for restoring woody plants on fly ash storage yards. Background technique [0002] Fly ash is a mixture of fly ash and combustion by-product bottom slag obtained after the flue gas of coal-fired boilers is collected by dust collectors. shaped particles. For a long time, my country has been the world's largest coal producer and also the world's largest coal consumer. Generally, every ton of coal burned produces about 0.1-0.5 tons of fly ash. In recent years, my country's thermal power generation has developed rapidly, and the output of fly ash has increased year by year. The annual output of fly ash at the end of the "Tenth Five-Year Plan" reached 302 million tons, and the annual output of fly ash at the end of the "Eleventh Five-Year Plan" reached 480 million tons. It is predicted that the annual output of fly ash ...

AI Technical Summary

Problems solved by technology

However, due to the serious social impact and huge pressure on the ecological environment, the pollution control and ecological restoration of the storage yard are very urgent.

However, at the present stage, the research work on vegetation restoration of fly ash storage yards is obviously less, especially the rare reports on the field restoration and application technology of storage yards

Although there are foreign soil engineering, the surface layer of the storage yard is covered with soil in a large amount, and then the vegetation restoration work is carried out, and the patents "CN101341845A" and "CN101053300A" provide a method of cultivating turf in situ on the fly ash storage yard by improving the surface matrix. method, but it is also mainly for the restoration of general herbaceous vegetation. The shallow layer of the storage yard is covered and fixed, which cannot control the overall fluidity of the storage yard with muddy characteristics, and the erosion of a large amount of water; in addition, there is no tree Participation of plants, especially large higher woody vegetation (large arbors, etc.), but herbs can only be maintained at the low-level stage of ecosystem evolution, and it is impossible to restore to a normally maintained ecosystem