Desert control method of chemical sand-fixing greening technology based on organic composite materials

Abstract

The invention discloses a desert control method of a chemical sand-fixing greening technology based on organic composite materials, and the desert control method is characterized in that hydrophilic polyurethane resin curing agent solution is sprayed on a sand or soil layer of greening objects for sowing the vegetation for forming a porous fixed sand layer. The fixed sand layer formed by the method has appropriate thickness and strength, good durability, good anti-freeze and melt properties and functions of water retention, thermal insulation, ventilation, vegetation and the like. According tothe method of the invention, the stable and effective solidifying can be carried out on sand even under the specific desert environments of no abundant groundwater sources and strong wind erosion, and the purpose of vegetation greening can be also realized. The method has large-scale construction properties and good economic performances, thereby being applicable to the needs of large-scale chemical sand fixing and vegetation greening of the vast desert and realizing the plant greening function and the ecological restoration and the control of desertified land.

Description

technical field [0001] The invention relates to a desert control method, in particular to a desert control method of chemical sand-fixing greening technology, which can be used for environmental control and ecological restoration of desertified land. Background technique [0002] The desertified land on the world's land accounts for about 30% of the total land area, and the desertified area continues to expand with the continuous destruction of the environment and frequent human activities. On the other hand, the world's population continues to increase, and the per capita land area continues to decrease, and mankind will face a serious food crisis. In order to avoid this kind of crisis, it is very necessary for human beings to protect the land and manage the land that has been destroyed and gradually desertified, so as to restore its ecosystem and land functions. [0003] Desertification refers to land degradation caused by various natural and man-made reasons such as clim...

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Problems solved by technology

[0009] The above method 1) can only be constructed in places with abundant groundwater resources. Since the surface of the sand layer in this method does not have a water-retaining protective layer, it is difficult for plants planted in places where groundwater sources are not abundant to survive.

The methods of 2) and 3) are difficult to thoroughly prevent and control the wind erosion disaster of the soil in areas where wind erosion is relatively strong; outstanding issues, the durability and UV resistance of these methods are also issues of concern

For method 4), although there are many chemical curing agent formulations, most of them are in the laboratory research stage and have not been promoted and applied on a large scale

Moreover, the chemical curing agents currently used have poor anti-ultraviolet, durability and anti-aging capabilities, and the curing layer has a single function, and has no functions of water retention, heat preservation, ventilation and vegetation, so it cannot be used sustainably for desertification prevention and control and restoration of environmental ecosystems

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