Liangzhou District, Wuwei City, Gansu Province, is located on the southern edge of the Tengger Desert. Here, there is a contrast of two colors and a game of two forces. Either the sand advances and the others retreat, or the human advances and retreats.
But you know what?
If you want to plant a tree in the desert, you need to plant "grass" first.
The reason why we need to "plant grass" first is because the desert is mobile. Planting trees directly on it can easily be submerged by wind and sand. The grass grid woven with straw can effectively prevent the yellow sand from spreading and flowing, and it can also reduce a certain amount of wind. Retaining a certain amount of water is equivalent to building a sand-proof "house" for the saplings.
"Grass planting" is actually the use of discarded straw that has been processed and spread on the sand to form a net, such as a miniature protective belt to block wind and sand and conserve water. This method is also called grass grid.
The step of making a grass grid is to plow a grid-like trench on the sand, spread bunches of straw in the sand trench, leave 1/3 or half of the wheat straw to stand naturally, and then poke the sand in the center of the grid. To the surrounding straw roots, make the wheat straw stand firmly on the sand.
From 2012 to the present, Liangzhou District has completed the obligation to suppress 178,600 mu of sand. In addition to the project’s sand control and the people’s spontaneous sand suppression, the area of desertified land has exceeded 1.41 million mu. The forest and grass coverage in the treatment area has also changed from the original Increase from less than 15% to more than 30%, and nearly 200,000 mu of farmland along the sandy area has been protected.
Ai Qinglong, Yan Jiao reports from Wuwei, Gansu
Editor in charge: 【Luo Pan】