China s desert management effect is outstanding, creating 3,000 acres of fertile land in half a ye

At present, the total land area of the world, about 100 million square kilometers, of which the desert alone accounts for 20%, and every year is expanding at a rate of tens of thousands of square kilometers, constantly competing with human beings for living space, so how to reasonably and effectively control desertification, it has become a global problem, Professor Yi Zhijian of Chongqing Jiaotong University in China, led the team after 7 years of repeated experiments, broke the traditional sand control model, successfully found the conversion code between sand and soil, and created 10,000 acres of fertile land in the desert.

In the general people's concept, the desert is caused by the lack of water, in fact, this is only one of the reasons, the other main reason, is that the gap between the sand and the sand is very large, the drainage is very strong, can not store water and nutrients like the soil, maintain the stability of plants, so it is difficult for non-sandy plants to survive.

If the sand encounters water, it can become a cement paste like the soil, and the sand particles can be bound and bonded to each other, so the team extracted a plant fiber binder from the plant, as long as the binder is put into the sand, and then a certain scale of water is added, about 2 minutes, the original golden sand, will turn dark brown like soil, and it is very sticky to the touch, if you hold it in your hand, it will not fall apart like the original sand, and if you pour it into the sandpit, the water in the sandpit will not be lost. This phenomenon brings great possibilities for the cultivation of crops.

After the technology matured, the team of Chongqing Jiaotong University, in one of the most difficult deserts in China, Inner Mongolia Alxa Ulabu and desert 25 acres of experimental fields, ready to gnaw this hard bone, they added plant binder to the sand, the sand was immediately fixed, showing a lasting resistance to wind erosion, the test planted corn, wheat, melons, fruits and vegetables, etc., the results showed that more than 70 kinds of plants grew gratifyingly, and successfully flowered and fruited, in stark contrast to the vast desert outside the fence, This also means that the desert test site has been a complete success.

So the research team on a wide range of experiments, the sandy area expanded to 3000, the use of large-scale mechanized planting methods, the material sprinkled on the surface of the desert, but half a year, the test base has grown into a piece of about 800 meters, stretching nearly 4 kilometers of oasis, watermelon, eggplant, tomatoes and other fruits and vegetables, not only high yield but also good taste, and then Inner Mongolia Xinjiang, Sichuan and other places, have experimented, from the desert hands snatched out of the hands of a piece of fertile land.

The biggest constraint of this technical means is still the water source, if the afforestation in the dry and hot desert area, not only is it difficult but also futile, because this kind of place lacks water source irrigation, but for the desert near the Hetao area, because it has water source and irrigation conditions, it will not cause excessive evaporation of water and waste of water resources, and will not cause secondary ecological damage, there is the possibility of transforming into cultivated land, but even if there are certain constraints, it cannot be denied, This technology can curb the trend of desertification to a large extent, improve the soil of the desert, and strive for more living space for the people.

There are a lot of people who go there to grow some plants, using batch planting, and there are things to control the amount of water in the plants.

It is only after repeated trials and repeated treatments that this result is achieved, using some grass to turn the desert into a lattice, and then planting in the lattice.

There is a need for afforestation in these places to increase the greening rate of the place, and at the same time, it is necessary to vigorously develop agriculture and improve the local soil environment.

First of all, it is to realize the return of farmland to forest, and at the same time, the sand and soil have been converted, and then this is also a new type of black technology.

1. Answer: The influence of the main climatic factors of the desert area, the long historical span, the desert area has basically remained the same, with urbanization, people have migrated, the damage has been reduced, and there are many desert control projects, so now the desert area is stable, basically there will not be much change.

3. Definition: Comprehensive management measures to prevent desertification and restore vegetation, improve soil fertility and control deserts in arid, semi-arid and sub-humid areas.

4. English expression: prevention and control of desertification

Generally speaking, it will not shrink, China's current measures to control desertification are still aimed at preventing wind and fixing sand, in order not to let desertification continue to intensify, even if artificial trees are planted, the desert area will not shrink, because human power is limited, nature is infinite.

It has been increasing, a little more than 10,000 square kilometers per year, and it was more than that, and it only reached zero growth in 2017.

This kind of problem is not an overnight thing, and the Three-North Shelterbelt is also designed for 70 years. Take your time and plant trees while enjoying the shade.

China's desertified land area has changed from expanding by 10,000 square kilometers per year at the end of the last century to shrinking by 2,424 square kilometers per year at present. The area of desertified land has changed from an annual expansion of 3,436 square kilometers at the end of the last century to a reduction of 1,980 square kilometers per year, realizing a historic transformation from sand entering and people retreating to green entering and retreating.

About 10,000 square kilometers are successfully managed every year, and about half of this number will be desertified, and it will take about 100 years to restore all of them.

There is a shrinkage, and a square meter of shrinkage is a shrinkage. o(∩_o

From 2010 to 2014, there was a net decrease of 6,416 square kilometers of desertified land in the country.

For a long time, the party has always regarded desertification prevention and control as an important strategic task and adopted a series of effective policies and measures. After decades and generations of unremitting efforts, China has made a major breakthrough in the control of land desertification. According to the third national monitoring of desertification and desertification, three major changes have taken place in the desertification status of land in China.

First, the area of desertification has been reduced. From 2000 to 2004, the total area of desertified land in China decreased by 6,416 square kilometers, from an average annual expansion of 3,436 square kilometers in the late 90s of the last century to an average annual decrease of 1,283 square kilometers. Second, the degree of desertification has been reduced.

The vegetation in the sandy area has increased significantly, and the area of mobile sandy land and semi-fixed sandy land has decreased year by year, and the proportion of desertified land in the desertified land has decreased from 1999 to 2004. The third is the reduction of expansion areas. In the late 90s of the last century, the area of desertified land in 19 provinces in the country decreased, and the area of desertified land in 27 provinces has been reduced in this monitoring.

Over the years, especially in recent years, major progress has been made in the construction of key projects for desertification prevention and control in China. In the past five years, the country has completed a series of ecological construction projects such as the control of sand sources in Beijing and Tianjin, the fourth phase of the three-north shelterbelt, the return of farmland to forest, the return of grazing land to grassland, the protection of grasslands, and the comprehensive management of small watersheds, and has completed a total of more than 4.8 million hectares of effective treatment area in the past five years, with an average annual effective treatment area of nearly one million hectares, 20% of the desertified land in the country has been treated to varying degrees, and the coverage of forest and grass vegetation in key treatment areas has increased by more than 20 percentage points, the ecological situation in some places has been significantly improved, and the sediment accumulation of major rivers has decreased year by year. It has effectively promoted the continuous improvement of the ecological situation in the country.

Although the trend of land desertification in the country has been curbed on the whole, land desertification in some areas continues to expand, and there are still nearly 320,000 square kilometers of land in the country with obvious desertification trends, and if it is not used properly, it is very easy to become new desertified land. This shows that the work of preventing and controlling desertification will be very arduous and arduous in the future, and we must attach great importance to it.

Our country not only has the feeling of the water town in the south of the Yangtze River, the desert scenery is also very attractive, from ancient times to the present, there are many trekking enthusiasts and archaeologists will go to the desert area to watch, the majestic scene of the desert has shocked countless people, but the desert also brings trouble to our human beings. I believe that many people know about the desert control project, some cities around the desert in China have been affected by the desert, resulting in sandstorms, land desertification and other problems, so China has also focused on the desertification control project since the nineties. After the sweat and time of the desertification control workers every year, we can now see the perfect oases in the desert.

After the excellent results of desertification control, many areas that were originally desert have become oases. As the number of oases grows, so do the more adventurous travellers who want to explore the desert scenery. Therefore, many desert areas have also carried out a series of tourist attraction projects for tourists to enjoy, and also to let the people know the importance and achievements of desertification control.

The good times did not last long, and with the increase in tourists, negative news began to appear about the results of 40 years of desertification control, and the current situation is worrying. Some desert control personnel told that the original desert area has not only turned into green trees, but also a lot of plastic bags, mineral water and other waste products. Those who go to the desert area for sightseeing, for their own convenience, throw the garbage bags and drink bottles they carry directly there, and the local staff have to clean up the garbage every year, which increases the workload, not to mention, this behavior is still the destruction of the desert area.

After seeing these news, many netizens also expressed their distress for the sand control people, and also called on people to take good care of the environment, after all, the hard work of more than 300,000 sand control workers cannot be ruined, their sweat cannot be in vain, and protecting the environment is also the responsibility that every Chinese must bear.

Because after those places were turned into oases, they attracted a lot of tourists, and those tourists left a lot of garbage, which affected the local environment.

Because these deserts have been around for many years, the transformation of deserts into oases can cause ecological changes, so they are even more worrying today.

Mainly because there are too many tourists, which has caused damage to the environment of the oasis.