The trend of desertification leads to land degradation, soil structure destruction and soil nutrient loss. And the natural recovery of soil fertility
It will take decades, hundreds or even thousands of years to recover. If artificial measures are taken to restore soil fertility, it is necessary to
It is difficult to calculate the necessary input.
Desertification is particularly harmful to agriculture. April to May is the spring sowing season every year. In desertification areas,
Seeds and fertilizers are often blown away, seedlings are uprooted, soil moisture is lost, and seedlings are blown dry or die.
Buried. In some places, folk remedies have to be repeated and even the farming season has been missed.
Grassland degradation caused by desertification gradually reduces or even completely loses the dominant grass species suitable for livestock growth.
Lost. Pasture becomes low and sparse, the yield is obviously reduced, and the livestock carrying capacity of grassland is greatly reduced.
Desertification has blocked rivers, reservoirs and canals. The annual sediment discharge of the Yellow River is10.60 billion tons, of which10.20 billion tons.
Hundreds of millions of tons come from desertification areas. More than 50,000 kilometers of irrigation canals in China are harmed by sandstorms all the year round.
Desertification has caused damage to railway subgrade, bridges and culverts in some areas, and to highway subgrade and pavement.
Sand, forcing road traffic interruption, and even make the road abandoned. The dusty weather caused by desertification affects the normal operation of aircraft.
Take off and land frequently.
Sandstorm activities destroy communication and transmission lines and facilities, and the resulting disasters threaten the safety of residents.
According to monitoring, urban air pollutants in China are mainly tiny particles, which are closely related to desertification.
Dust pollutes people's production and living environment in vast areas and affects people's health.
Desertification has deepened poverty and widened regional disparities. According to the survey, 1/4 of the rural population in China.
Living in desertification areas, its per capita agricultural output value is only 34. 2% of the national average, that is, the eastern part of China.
The area is 1/5. Poverty in desertification areas has intensified, the development gap has widened, and some places have shouted "Good!"
The slogan "survival is sand control".