Land desertification, what is land desertification?

Your question is not clear, what is it that makes people feel ah!

Land desertification refers to the destruction of the original fragile ecological balance in arid and semi-arid areas due to unreasonable human development and business activities, resulting in the degradation process of sandy desert environment similar to sandy desert environment with wind-blown sand activities as the main feature in the original non-desert areas. Desertification and the resulting deterioration of the surrounding environment and economic poverty have been listed by the international community as one of the major problems that threaten the survival of mankind. China is one of the countries with a serious problem of desertification.

There is a historical process in the formation of the problem of desertification. It is very necessary to study and resolve the problem of desertification today and take the road of sustainable development.

One. Historical desertification processes in our country include desertification in arid areas and desertification in semi-arid areas.

The first is desertification in arid areas. The arid deserts are found in the northwest, and most of them have rotted in geological time. However, in some oasis areas on the edge of the desert, due to historical man-made indiscriminate reclamation, indiscriminate grazing, indiscriminate woodlogging, and irrational use of water resources.

Factors such as climate change and irrational human economic activities have led to the degradation of land in arid, semi-arid and drought-prone sub-humid lands.

The formation of land desertification is a complex process, which is the result of the interaction between unreasonable human economic activities and fragile ecological environment. Natural geographical conditions and climate variation have created conditions for the formation and development of desertification, but the process is slow, and human activities have stimulated and accelerated the process of desertification, which has become the main cause of desertification.

When the climate dries, desertification develops; When the climate becomes wetter, desertification is reversed. Global warming, increasing drought in the northern hemisphere, and the trend of semi-aridization have all contributed to the intensification of desertification.

Population growth and economic development have put too much pressure on the land, and over-cultivation, overgrazing, deforestation and irrational use of water resources have led to serious degradation of land, destruction of forests, gradual drying of the climate, and eventually desertification.

Land DesertificationDeserts are a product of an arid climate, and there were deserts on Earth long before the advent of humans. But there is no insurmountable boundary between the desolate desert and the fertile steppes. With water, lush plants can grow on the desert and become an oasis full of life; Without water and plants, green spaces can quickly degenerate into gravel.

In order to get more food, people will open up wasteland for farming and overgraze regardless of climate and land conditions; In order to solve the fuel problem, regardless of the consequences, trees and grass are cut and cut indiscriminately. The arid and semi-arid regions, which were already dry and windy, are now ravaged and the vegetation destroyed, with less precipitation and stronger winds, strong winds eroding the topsoil, increasing the amount of sand and slowly developing sand dunes. This turns arable land into desertified land that is not suitable for grazing and farming.

Land desertification is a sign of environmental degradation and a positive feedback process of environmental instability. If fundamental measures are not taken, the process of land erosion and desertification will not stop automatically, but will intensify development.

Desertification.

Bai may be natural. du

Desertification as a natural phenomenon is caused by the drying out of the earth.

DAO dry belt moves.

The resulting climate change has led to localized desertification. However, most of the causes of desertification around the world today are attributed to human causes; Rapid population growth, over-cultivation of land and livestock have made the land unsuitable for farming.

Desertification refers to the decline or even loss of productivity of organisms on the land. The main cause of the cause is the destruction of the natural environment by human beings. One of the places where desertification is most pronounced is in Sahel, on the southern side of the Sahara Desert.

In the northern part of the area, sheep and camels are raised in a nomadic or grazing desertification pattern, which eats up the entire area of vegetation, resulting in a bare patch of land. In the wetter south, the whole area gradually became barren due to the overbreeding of domestic animals and the fact that the cultivated land, which was originally only a square inch of land, could not afford to continue farming.

Coupled with the lack of water, people began to dig well water, and when people gathered for water, more livestock were raised, which again accelerated the deterioration of the environment and contributed to desertification, and this vicious circle made life very difficult for the people in the area. There is no rainy season in the Sahara Desert, so there is no rainfall, but as long as there is the slightest moisture, the plants that sleep in the ground will rush to sprout, but soon, they will be eaten up by overgrazing livestock...So the desertified soil is still expanding silently....

It is caused by human indiscriminate cutting and deforestation, and reclaiming a large amount of forest land for farming.

Water is the source of life......Environmental issues.

Land desertification is mainly caused by the destruction of vegetation and the irrational use of water resources, so the control measures mainly include rational water use and vegetation restoration. The measures to prevent and control land desertification mainly include:

1. Rational allocation and utilization of water resources to develop water-saving agriculture.

2. Adjust the land use structure, rationally graze and actively build a forest network to protect the field.

3. Expand the vegetation coverage, set up sand barriers and build a protective system for sand fixation.

Combating desertification :

First of all, there is a clear remediation goal. That is, to implement national environmental and resource laws and regulations, and establish a prevention and control system that not only prevents desertification, but also promotes sustainable economic development. Seek the coordination of ecological, economic and social benefits.

Secondly, measures should be taken according to local conditions according to different natural conditions and the nature of various external forces.

It is necessary to have a sound and perfect governance implementation system, which is the basic guarantee for the implementation of governance measures according to local conditions and the completion of desertification prevention and control goals.

The establishment of early warning systems is an important means to prevent the occurrence and development of desertification. Poverty eradication should be at the heart of any effective strategy and response to combat desertification.

1. Rational use of water resources.

2. Use biological and engineering measures to construct shelterbelt systems.

3. Regulate the relationship between agriculture, forestry, wood, animal husbandry and fishery.

4. Take comprehensive measures to solve local energy problems in multiple ways.

5. Control population growth.

6. Promote the rotation system of crops.

7. Promote the soil protection system.

8.Plant more trees.

9.Strengthen education on desertification.