Causes and control measures of land desertification

Many students want to know what are the measures to control land desertification and what are the causes. I sorted out the relevant information, hoping to help everyone!

What are the control measures for land desertification? 1. The control measures in semi-arid areas mainly include:

① Adjust the land use structure that is not conducive to the virtuous circle of ecological environment, and rationally arrange the proportion of agriculture, forestry and animal husbandry.

(2) Enclosure the desertified abandoned farmland and degraded grassland to restore vegetation.

(3) Take the form of rotation or sub-regional rotation to limit the stocking amount.

④ Sand fixation method with plants as the main part and engineering measures as the auxiliary part.

2, drought prevention measures mainly include:

① Take the inland river basin as the ecological unit for comprehensive planning, and rationally allocate the proportion of water used in the upper, middle and lower reaches.

(2) Taking the oasis as the center, establish a shelter forest system combining the sand sealing belt at the periphery of the oasis, the sand prevention forest belt combining arbor and irrigation at the edge of the oasis, the narrow forest belt inside the oasis and the small grid farmland shelter forest network.

(3) For the mobile sand dunes on the edge of the oasis, the protection system combining setting sand barriers on the surface of the sand dunes and planting sand-fixing plants in the sand barriers is adopted.

④ Take measures to improve the soil on the basis of preventing sand damage.

What are the causes of land desertification? (1) (the most important natural factor) drought, evaporation is greater than precipitation, living inland, far from the sea, it is difficult to reach ocean water vapor. Surrounded by mountains, the Qinghai-Tibet Plateau is blocked. ② There is wind ③ It is close to the source of winter wind (Siberia), and the terrain is small and there is no mountain block, which makes the strong wind drive straight in. ④ sparse vegetation, low vegetation coverage ⑤ loose soil, Desert (this is the basis of desertification) ⑤ Cold current flow can reduce temperature and humidity (it can be changed) ——————————————————————————————————————————————————————————————— The number of livestock should be adapted to the carrying capacity of grassland (such as advocating rotational grazing). The fundamental measures to solve the problem are to control population, improve population quality, implement ecological migration policy (note 1), rationally use water resources, reduce the number of wells, and improve irrigation technology (drip irrigation, etc.). ), popularize water-saving technology and rationally allocate water resources in the upper, middle and lower reaches of rivers.