Causes of soil desertification, the harm of soil desertification to agriculture

There are natural and man-made factors.

1.Natural factors are predominantly climatic. Desertification mainly occurs in arid and semi-arid areas, because of the small rainfall, the soil particles lack the condensation of water, the particles are scattered, and it is easy to fly after the wind blows, and it is more difficult for the soil to retain water after losing the fine soil particles, and it is slowly desertified.

2.The human factors are mainly over-excavation and overgrazing to destroy the vegetation, and the soil loses the protective effect of surface plants and the attachment of the root system, which is easy to fly and cause desertification.

1.Reduced soil fertility: Desertified soils lack organic matter and microorganisms, resulting in reduced soil fertility, which is not conducive to crop growth and development.

2.Low water use efficiency: Desertified soils have high porosity and strong water permeability, which is easy to form water loss and leakage, resulting in low water use efficiency.

3.Crop growth restriction: Insufficient nutrients in sandy soils, combined with insufficient moisture**, lead to limited crop growth and reduced yields.

4.Land desertification is intensifying: Desertified soils have poor erosion resistance and are susceptible to erosion by wind and water erosion, which further leads to land desertification and affects agricultural development.

5.Destruction of the ecological environment: The ecological environment of the desertified soil is destroyed, the biodiversity is reduced, and the surface vegetation coverage is reduced, which affects the maintenance of ecological balance.

6.Socio-economic impacts: Desertified land is difficult for agricultural production, resulting in a sluggish local rural economy, and also affecting people's living standards and social stability.

1. Population growth. The population is growing while the land area is shrinking, leading to overuse of land.

2. Overgrazing, over-reclamation, and over-logging. These actions have led to desertification of the land or the aggravation of the desertification of the land.

3. Unreasonable use of water resources and unreasonable mining. This has also had a significant impact on the desertification of the land.

4. There is also the influence of geographical environment factors. Arid and semi-arid regions are deep in the hinterland of the continent and have the least precipitation and the largest evaporation in the same latitude in the world, and these places are prone to desertification.

5. Finally, there is the influence of climate. When the climate becomes drier, desertification develops, and when the climate becomes wetter, desertification reverses.

What are the hazards of land desertification?

1. Reduction of available land resources.

Desertification means land degradation, and the continuous decline in the productive capacity of desertified land will lead to a reduction in agricultural and animal husbandry production land, and farmers and herders will be forced to "ecological migration". At the same time, desertification will also affect the land for residential production by severe sandstorms and resource shortages, resulting in the reduction or even disappearance of land population.

2. Threatening traffic safety.

Shifting sand dunes can bury roads and railways; Sandstorms can reduce atmospheric visibility and force airports and roads to shut down.

3. Natural disasters are intensifying.

The most obvious aspect of desertification is the intensification of natural disasters. Sandstorms, sandstorms, and fog will ruthlessly disrupt the order of our production and life, and even endanger people's health.

4. Land productivity is in serious decline.

Soil wind erosion is not only a major component of desertification, but also a primary link. Wind erosion causes the loss of organic matter and fine-grained matter in the soil, resulting in soil coarsening and reduced fertility.

Climatic factors of desertification of the land.

The updraft in the equatorial region flows in the direction of the poles at high altitude, due to the influence of the earth's rotational deflection force, near 30 degrees north and south latitudes, the air in the large wide collapse no longer advances, but accumulates at high altitude, and radiates to cool and sink, and the near-surface atmosphere maintains high pressure all year round, which is called the "subtropical high pressure belt" in meteorology. Except for the monsoon climate zone on the east coast of Eurasia, this area has a dry climate and few clouds and rains, and has become the main desert distribution area.

Summary. Hello, I'm glad to answer for you, yes, desertification of the soil will lead to river twists and turns.

Hello, I'm glad to answer for you, yes, desertification of the soil will lead to river twists and turns.

Why? Because the land sand is intensified, the river bank line will become more and more chaotic and curved, so that the underwater landform body will be exposed, which will lead to more tortuous river shoreline, and eventually lead to the situation that the river tends to be vertical and tortuous.

Related informationLand desertification refers to the phenomenon of gradual sandification of topsoil due to soil erosion, loss of fine grains (silt, clay), or loss of land productivity due to the invasion of quicksand (sediment). Land desertification is mostly distributed in arid and semi-arid areas with fragile ecological environment, or slow skin slag near large desert areas and Mingsha areas. The causes of land desertification include natural factors such as climate, as well as human activities such as excessive grazing, indiscriminate deforestation, land reclamation, and irrational use of water resources.

Whether desertification occurs is related to the soil moisture balance, and when the amount of soil water recharge is less than the amount lost, there is a tendency to desertification. Desertification of disturbed land has led to the reduction of available land resources, the decline of land productivity, and the intensification of natural disasters. The large-scale spread of land desertification can evolve into land desertification.