The effect of desert control in China is outstanding, and 3000 mu of "fertile land" has been created in half a year. How exactly is it managed?

At present, the global total land area is about 65.438+0.49 billion square kilometers, of which desert alone accounts for 20%, and it is expanding at the rate of tens of thousands of square kilometers every year, constantly competing with human beings for living space, so how to control desertification reasonably and effectively has become a global problem. After 7 years of repeated experiments, Professor Yi Zhijian of Chongqing Jiaotong University led the team to break the traditional sand control mode and successfully find the relationship between sand and soil.

What technology is this? In the common people's mind, desert is caused by lack of water. In fact, this is only one of the reasons. Another main reason is that the gap between the sand is large and the drainage is strong. It can't keep water and nutrients and maintain the stability of plants like soil, so it is difficult for non-desert plants to survive.

If sand can be turned into cement paste like soil when it meets water, and sand grains can be bonded to each other, the team extracted a plant fiber adhesive from plants. Just put this adhesive into the sand and add a certain amount of water. After about 2 minutes, the originally golden sand will turn dark brown like soil and feel sticky. If you hold it in your hand, it won't spread out like the original sand and pour it into the bunker.

After the technology was mature, the team of Chongqing Jiaotong University launched a 25-mu experimental field in Wulabu Desert, Alashan, Inner Mongolia, one of the most difficult deserts in China, ready to chew this hard bone. After they added plant adhesives to the sand, the sand was immediately fixed, showing lasting wind erosion resistance, and corn, wheat, fruits and vegetables were planted experimentally. The results show that more than 70 kinds of plants grow happily and bloom smoothly, which is in sharp contrast with the vast desert outside the fence.

So the research team launched a large-scale experiment, expanding the sand area to 3000 pieces, and using large-scale mechanized planting methods to scatter materials on the desert surface. However, in half a year, the experimental base has grown into an oasis with an area of about 800 meters and a stretch of nearly 4 kilometers. Watermelon, eggplant, tomatoes and other fruits and vegetables are not only high in yield, but also delicious. Later, experiments were carried out in Inner Mongolia, Xinjiang, Sichuan and other places, and they were snatched from the desert.

So in this way, can all deserts become green spaces? The biggest constraint of this technical means is water source. It is not only difficult but also futile to plant trees in the dry and hot desert area, because there is a lack of water irrigation in this area. However, for the desert near Hetao area, because of the water source and irrigation conditions, it will not cause excessive evaporation of water and waste of water resources, nor will it cause secondary ecological damage, so it is possible to transform it into cultivated land. However, even with certain limitations, it cannot be denied that this technology can curb desertification to a great extent.