Why is it easy to cause desertification due to the large loss of forests?

Tree roots can fix the soil, reducing rainwater from taking it away, the roots themselves will also store water, keeping the moisture in the soil stable, trees can stop the wind from kicking up the soil, and leaves can photosynthesize.

Improving the natural climate environment, which is in good reputation, therefore, deforestation and felling of trees is land desertification.

complicity. Open land, large amounts of grassland and woodland are cultivated for arable land. As these areas are arid and semi-arid, the loss of vegetation protection in the soil during the agricultural idle season after the conversion of grasslands and woodlands to cultivated land, coupled with technical and socio-economic constraints, has led to the continued expansion of desertification of cultivated land.

Overgrazing, resulting in land.

<> watch trampled on. The soil structure on the surface of the grassland was severely damaged. After the wind erosion, a large number of wind erosion gaps appeared. The more livestock there are in the steppe, the more bare soil there will be, and the more desertification there will be. Land desertification, also known as land desertification, is a global environmental problem.

One. It refers to the arid and semi-arid steppe areas on the edge of the desert, due to the scarcity of precipitation, high evaporation, arid and windy climate, the land loses vegetation cover, and soil erosion gradually evolves into a desert area. Desertification of land, loss of biological productivity of land, erosion of cropland, grassland and woodland by sand, threatening transport and villages.

Desertification has both natural and man-made causes. Drought is the main natural cause of land desertification.

Population growth and economic development have put land under heavy pressure, with over-cultivation, overgrazing, deforestation and irrational use of water resources leading to severe land degradation, destruction of forests, gradual drying of the climate, and finally desertification. "Earth canker disease" has a wide range of harms and has become a serious restriction on the sustainable development of China's economy and society.

major environmental issues.

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Because the forest area is reduced and there are no trees to fix the soil, the soil will become very loose, and the desertification of the soil will become larger and larger, and over time it will cause desertification, which will affect the environment very much.

Because after the reduction of forests, there is no way to better preserve the moisture of some soil, and there is more sediment in the air, which can easily cause desertification.

With fewer forests, the land will become less absorbent in water, and in addition to environmental changes, it is very easy to cause desertification.

This is due to the indiscriminate deforestation in recent years, which has reduced the amount of vegetation and the erosion of wind and sand, which has gradually expanded the area of the desert.

Because the earth's freshwater resources are becoming scarcer and more arid, the desert is expanding more and more.

That's because the vegetation is reduced, and once the vegetation is reduced, it is impossible to maintain water and soil, and when the water is lost, the soil naturally becomes a desert.

Due to human causes, many forests and grasslands have been destroyed, and many grasslands are gradually desertified.

The loss of water expands the desert.

Entering the depths of the northwest is an extremely challenging season, with the temperature difference between day and night, and the harsh climate, so that everyone who comes here can truly feel the most difficult place in China. But this is by no means the hardest time, and the real hardest time is when you enter the depths of winter. But no matter how bad the conditions, poplar forests.

Always stay here.

A thousand years of immortality, a thousand years of immortality, a thousand years of immortality, three thousand years of "mythology" to describe poplar forest is not an exaggeration. In Ejina.

In the three places of Mulei and Hami in northern Xinjiang, in addition to the poplar forests with yellow leaves, there are still many immortal trees on the earth.

At first, we thought it was vandalism, but after learning about it, we realized that these three places are listed as protected areas, and the dead wood that fell on the ground is a natural death.

Locals tell us that withered poplar forests like this will hold out for hundreds of years before they fall, and that the roots rooted deep in the desert allow the trees to resist the wind and sand.

Even fallen dead wood takes a long time to decay and eventually become part of the desert. And it is this kind of tenacity that poplar forests are known as the strongest trees in our country.

China has the world's largest poplar forests, but most of them are concentrated in China's Xinjiang region, in the last century due to the lack of environmental awareness, poplar forests have suffered fatal damage, many of the original poplar forests were cut down as firewood to burn, its area has shrunk rapidly, to today is less than half of a hundred years ago.

With a series of protection policies and people's gradual recognition of the role of poplar forests in resisting desertification, coupled with the fact that poplar forests have become a local tourism feature in recent years, the damage to poplar forests has been alleviated, and now these are sticking to the Gobi Desert in China.

The trees in the area were able to survive and slowly recover.

With the boom in tourism in the northwest and China's development of the western region in recent years.

Access to the Northwest Territories.

The infrastructure is gradually improving, and the tenacious life of this bitter cold land in the past is slowly being known to the public. We also hope that tourists will not only be attracted by the beauty of poplar forests, but also be able to understand and protect poplar forests with a protective mentality, knowing that most of the poplar forests in the whole world are in China.

Because trees are generally very tall and leafy, they will be weakened a lot when the wind blows in the desert and encounters large trees, so it can stop the wind and sand from getting bigger and bigger.

Because the root system of the tree develops downward, the root system of the tree will grasp the soil downward, and at the same time, it will lock in water, and the soil is not easy to lose. Trees on the ground will reduce the wind speed so that the wind doesn't take away more soil.

Because the roots of the tree will take root in the soil and then hold the soil in place.

As we all know, the physical geography of the earth's surface is an organic whole, and its constituent elements include topography, climate, biology, soil and hydrology. These natural geographical elements will influence and restrict each other to form the natural geographical environment of a certain place, that is to say, whether a certain area is covered by forest vegetation or desert vegetation is affected by a variety of factors, especially climatic factors.

At present, the distribution areas of deserts on the earth are mainly northern Africa, West Asia, Central Asia, the central and western regions of Australia, and the west coast of the subtropical continent in North and South America. If all these deserts are turned into forests, then it means that the precipitation in these areas has increased, and they have become semi-humid or humid areas.

Map of the distribution of the world's forests.

If the whole world is covered with vegetation on land and most of the land is covered with forest vegetation, then it must have a big impact on the geographical environment. First of all, for the Earth's atmosphere, due to the increased photosynthesis of vegetation, the absorption capacity of carbon dioxide is enhanced, and more oxygen is also released. There is certainly a lot of benefit to the current serious problem of global warming, and we know that the recent forest fires in the Amazon rainforest in South America have caused many environmentalists to be extremely worried.

Secondly, a large amount of forest cover can conserve more water sources and greatly improve the tension of human water resources. From the perspective of external forces, the wind will be greatly weakened, while the flow of water will be enhanced, and many wind erosion landforms, such as wind erosion mushrooms, wind erosion castles, wind erosion depressions, etc., will be difficult to see. Of course, the above analysis is based on assumptions, and there are still large areas of desert areas on the earth's surface, and there are many areas with a tendency to desertification, which urgently need to be protected by human beings.

There is a rumor that the Sahara Desert was a lush area long ago. Experts have found dinosaur fossils in the Sahara Desert, which can prove that this place was not inhospitable and a land of life a long, long time ago, so how did the desert come to be?

Can we turn a desert into a forest? Let's tell you about it. <>

Only 30 per cent of the global village we live in is suitable for human habitation, and 20 per cent of it is desert. The famous Sahara Desert covers an area of 8.6 million square kilometers, and scientists have found that many deserts are located under the mountains or in basins, and the sand in the mountains is due to the phenomenon of thermal expansion and contraction at night. The rocks on the mountain range produce a large amount of debris, which will be blown down the mountain in windy weather, covering the original soil, and over time it will form a desert.

Another reason is that many organisms and plants cannot survive in the area where there is a lack of water resources, and the perennial drought leads to no vegetation cover on the ground, and over time it will naturally form a desert. The last reason is man-made: because human beings have cut down trees for a long time and destroyed the ecological environment in many forests, leaving part of the land without the protection of surface plants, resulting in an increasingly arid climate, when strong winds hit, the surface sediment will be blown away, and then the Gobi will be formed, which will accumulate when the wind weakens, and eventually form a desert area.

In fact, it is not impossible to turn deserts into forests again, and the most proposed method is to plant trees and gradually turn deserts into forests, if the world's deserts can really become forests, then the greenhouse effect caused by the earth can not be solved. At present, many countries are planting trees, but the purpose is not to eliminate deserts, but to prevent desertification and to extinguish sandstorms.

Deserts have been weathered over thousands of years, and I think it's okay, as long as the desert has enough water, it will one day become a forest.

It is mainly due to unreasonable farming, overgrazing, unreasonable wood mining, and perennial drought and windy weather; In addition to the naturally formed desert, there is also the phenomenon of desertification caused by human activities, which is very extensive and cannot be changed by manpower.

Forced afforestation in desert areas will exacerbate the desertification of local soils. Why?

Eventually, the groundwater was drained, the trees died, and the desertification worsened. As a result, afforestation has become the last straw that crushes the desert ecology. It's like a cancer cell, it lives by eroding the mother, and finally the mother dies, and he is finished.

Life in the world is also a truth, just like a sapling, it should be planted in a place with abundant water and grass in order to complement each other; If you grow in the wrong place, the deeper the effort, the worse the environment, and you can only lose both.

Land desertification: Desertification in the narrow sense (i.e., desertification) refers to the process of environmental change similar to desert landscape in the fragile ecosystem due to excessive human economic activities that destroy its balance.

That is, to cut down trees indiscriminately, so that the balance of the land is destroyed and turned into sand!

1. Rational use of water resources

1. In the farming area, it is mainly to improve tillage and irrigation technology, promote water-saving agriculture, and avoid soil salinization;

2. In pastoral grasslands, reduce the number of wells to avoid a large number of disorderly growth of livestock;

3. In arid inland areas, it is necessary to rationally allocate water resources in the upper, middle and lower reaches of rivers, and consider the development of the upper and middle reaches of the rivers and the protection of the ecological environment in the lower reaches.

2. Use biological and engineering measures to build a protection system

1. Oasis area in arid areas:

a. Sand sealing and grass cultivation should be carried out in the desert edge area on the periphery of the oasis;

b. Create a sand-control forest belt combining trees and shrubs in the front area of the oasis (actively protect, restore and develop natural shrub and grass vegetation);

c. Establish a farmland shelterbelt network in the oasis to form a multi-layer protection system.

3. Adjust the relationship between agricultural and forestry land - suitable for forests and land, and suitable for grazing

1. The existing forest land should be regarded as a part of the shelterbelt, and no more deforestation should be reclaimed.

2. The shrub and grassland area between the wasteland and the oasis at the edge of the oasis cannot be blindly reclaimed, and is mainly used for planting trees and grasses and developing forestry and animal husbandry.

3. In places where desertification has been caused, farmland should be returned to forests and pastures.

Fourth, take comprehensive measures to solve the energy problem in agricultural and pastoral areas in multiple ways: the way to solve the energy problem of farmers and herdsmen: such as the construction of charcoal forests, the construction of biogas digesters, and the promotion of provincial firewood stoves.

5. Controlling Population Growth: Controlling the excessive development of the population, improving the quality of the population, and establishing an ecosystem for the coordinated development of population, resources, and environment are of great significance to the prevention and control of desertification.

Because forcibly planting trees in desert areas will destroy the ecological environment of the desert, and those trees will absorb the water of the desert, which will further lead to the reduction of water and the desertification of the soil.

If afforestation is not taken into account, vegetation may reduce groundwater and dry out the land, thereby exacerbating desertification.