Exploring New material and Technology of Sand Prevention and Control "Weaving Green" Desert

this reporter has learned from the northwest institute of ecological environment resources of the chinese academy of sciences that the new sand-fixing nets and new sand-fixing technologies developed by this unit have made significant progress in preventing and controlling desertification in gansu, ningxia, and other places.

Dunhuang in Gansu Province is the site of Mogao Grottoes, a world cultural heritage, and one of the important source areas of dust in northwest China. The reporter recently visited Dunhuang "Mother River"_Danghe River upstream area to see, a sand-fixing net like a piece of "green chessboard" blanket in the desert, firmly lock the mobile sand dunes, effectively reduce the sand into the Danghe Reservoir, for Dunhuang water safety to provide security.

Qu Jianjun, researcher of Northwest Institute of Ecological Environment Resources of Chinese Academy of Sciences and director of Dunhuang Gobi Desert Research Station, introduced that compared with the grass square used in traditional sand prevention and control, the green sand-fixing net used in the upper reaches of Danghe River is made of high-density polyethylene material. "This material is more environmentally friendly, convenient to construct, low in cost, long in service life, and more effective in sand control and fixation." Qu Jianjun said that this new material also solved the problem of sandstorm disaster faced by Qinghai-Tibet Railway.

A new technology called soil biological crust has been applied in Ningxia Hui Autonomous Region. " We extracted the microorganisms most suitable for crust formation from algae and mosses, cultured them artificially in the laboratory, and made them into reagents. We sprayed them on the sand in the grass square sand barrier to form soil crust and achieve the purpose of sand fixation." Li Xinrong, researcher of Northwest Institute of Ecological Environment Resources of Chinese Academy of Sciences and director of Shapotou Desert Research Experimental Station, told reporters.

Desertification is known as "Earth cancer", data show that desertification land area accounts for about 27% of the country's land area. It is not only the responsibility of scientific research institutions to control sand damage and restore ecology, but also more and more enterprises to join the team of sand prevention and control.

Yang Qingli, founder of Shenzhen Micro-wetting Irrigation Technology Co., Ltd., said that they have developed a nano-aperture micro-wetting tube made of polymer semi-permeable membrane material to solve the problem of desert irrigation. "The micro-wetting pipe is buried underground, which can slowly and evenly moisten water, prevent water leakage and evaporation, and supply water directly to the roots of plants from underground for 24 hours continuously, making desert irrigation as convenient and effective as ordinary farmland irrigation." Yang Qingli said.

According to reports, this desert irrigation technology was applied in 2012 in the vegetation restoration project of rare bird habitat in Abu Dhabi West District, United Arab Emirates. With the support of irrigation technology, the ecological environment of this once severely degraded desert area has been significantly improved. Not only a variety of desert plants grow, but also desert insects and rabbits and other animals appear.

The results of the fifth national desertification and desertification monitoring show that the area of desertification and desertification in China has been reduced for 10 consecutive years since 2004.