What measures have been taken to control soil desertification in northwest China?

Various measures are nothing more than: 1. Forest and grass measures 2. Engineering measures 1. Forest and grass measures are characterized by slow effect and long period, but they can cure the root cause. 2. Characteristics of engineering measures The engineering measures are quick to take effect, and the cycle is shorter than that of forest and grass measures, with immediate results and outstanding effects. But it can only solve the urgent need. In the process of management, there is no doubt that the combination of forest and grass measures and engineering measures can achieve the best results. For the prevention and control of desertification in China, the control measures should be based on the causes of desertification. 1. Desertification caused by wind erosion. Generally, it is necessary to set up mechanical sand barriers or use chemical methods to fix sand. (1) Mechanical sand barriers are made of firewood, branches, clay, branches and other materials, and obstacles are set on the sand surface to control the direction, speed and structure of sand flow, so as to achieve the purpose of preventing wind, fixing sand and changing landforms, and are collectively referred to as mechanical sand barriers. (2) Chemical method is to spray cementing chemicals on the surface of loose quicksand, so that water quickly penetrates below the sand layer, so that the sand surface has a protective shell, so as to avoid the loose structure of airflow and loose sand surface and play the role of wind erosion. Like mechanical sand barrier, it is a palliative measure and an auxiliary, excessive and supplementary measure for plant sand control. (3) Wind-driven sand control is a way to control wind erosion and transportation based on wind power, and make use of the situation to turn harm into benefit. (4) Hydraulic sand control. With water as the power, sand can be transported as needed to eliminate sand damage. The essence is to use hydraulic power to directionally control erosion and transportation, so as to achieve the purpose of promoting the benefits and eliminating the evils. 2. Desertification caused by hydraulic erosion. Ready-to-use soil and water conservation engineering measures (slope, ditch, drainage and storage) 3. For desertification caused by salinization. You can use water conservancy engineering measures. (1) Drainage engineering (2) Irrigation and improvement of saline-alkali land (3) Irrigation and salt spraying can also use agricultural bioengineering. Rice planting improvement, paddy-upland rotation, fertilization and salt suppression, land leveling, and deep-turning ridge 4. Desertification caused by road mining projects. (1) Correct site selection; (2) Engineering: sand barrier, foundation protection, slope protection; (3) Biology: windbreak forest, reasonable structure of arbor, shrub and grass, windbreak and sand fixation; (4) Living sand barrier; (5) Chemistry. In the end, it is really impossible to close the mountain to facilitate afforestation. But the status quo may not meet the requirements of the above measures. Environmental workers' hard work and low wages, and people's lack of attention are all problems.

1. remediation measures in non-desert areas: in chronological order: returning grazing to grassland-returning farmland to forests-sand control project in Beijing, Tianjin and Hebei-ecological migration. Everyone knows that this is led by the government and the policies are consistent. 2. Remediation measures in desert areas: International friends: Japanese. Whether it is toyama seiei in Kubuqi Desert or Japanese-funded sprinklers in non-desert areas. It has indeed made great contributions to the improvement of the ecological environment. Local government: In the 199s, when the yellow sand was raging, the local government began to realize the environmental problems and began to plant trees on a large scale. In primary and secondary schools, schools organize to bring dry food and plant trees on Arbor Day. The school has never been organized since high school, because the ecology has been controlled. Non-governmental organizations: private enterprises and voluntary non-profit organizations. Let me talk about the contribution made by a private enterprise I know better to Kubuqi Desert and desertification. For desertification caused by wind erosion. Generally, it is necessary to set up mechanical sand barriers or use chemical methods to fix sand. (1) Mechanical sand barriers are made of firewood, branches, clay, branches and other materials, and obstacles are set on the sand surface to control the direction, speed and structure of sand flow, so as to achieve the purpose of preventing wind, fixing sand and changing landforms, and are collectively referred to as mechanical sand barriers. (2) Chemical method is to spray cementing chemicals on the surface of loose quicksand, so that water quickly penetrates below the sand layer, so that the sand surface has a protective shell, so as to avoid the loose structure of airflow and loose sand surface and play the role of wind erosion. Like mechanical sand barrier, it is a palliative measure and an auxiliary, excessive and supplementary measure for plant sand control. (3) Wind-driven sand control is a way to control wind erosion and transportation based on wind power, and make use of the situation to turn harm into benefit. (4) Hydraulic sand control. With water as the power, sand can be transported as needed to eliminate sand damage. The essence is to use hydraulic power to directionally control erosion and transportation, so as to achieve the purpose of promoting the benefits and eliminating the evils. 2. Desertification caused by hydraulic erosion. Ready-to-use soil and water conservation engineering measures (slope, ditch, drainage and storage) 3. For desertification caused by salinization. You can use water conservancy engineering measures. (1) Drainage engineering (2) Irrigation and improvement of saline-alkali land (3) Irrigation and salt spraying can also use agricultural bioengineering. Rice planting improvement, paddy-upland rotation, fertilization and salt suppression, land leveling, and deep-turning ridge 4. Desertification caused by road mining projects. (1) Correct site selection; (2) Engineering: sand barrier, foundation protection and slope protection; (3) Biological windbreak forest, reasonable structure of arbor and shrub, windbreak and sand fixation, and active sand barrier; (4) Chemistry.