Arid area desert sand fixation method

Abstract

The invention discloses an arid area desert sand fixation method. The method includes the steps that firstly, parallel strip-shaped sand barriers which are in a cell shape and have the side length ranging from 1 m to 2 m or parallel strip-shaped sand barriers with the interval ranging from 1 m to 2 m are pressed on a drought dessert area; secondly, wide-line densely-planted shrubbery strips are planted in the sand barriers mentioned in the first step, wherein due to the row spacing of the shrubbery strips, the ventilation coefficient of the shrubbery strips ranges from 0.3 to 0.45 after the shrubbery strips grow into forests, and the row spacing is 10 times to 20 times of the average height of the shrubbery strips after the shrubbery strips grow into the forests. The technology of conducting comprehensive sand fixation by combining the cell-shaped or the strip-shaped sand barriers with wide-line densely-planted forestation is adopted, and therefore the number of trees in the unit area is reduced, survival and normal growth of the trees can be ensured even in places where rainfall capacity is small, and the wind prevention and sand fixation effect can be given into full play for a long time to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of desertification prevention and control, in particular to a sand-fixing method for deserts in arid regions. Background technique [0002] my country's current land area of ​​desertification and sandification is 1,731,100 km 2 , accounting for 18.03% of my country's total land area, the national economic loss due to land desertification, including desertification, is about 470 billion yuan. Under the existing technical, economic and natural environmental conditions, the sandy land that can be controlled in recent decades is about 500,000 km 2 . According to the "National Ecological Environment Construction Plan" promulgated by the State Council in 1998, in terms of desertification control, the short-term control target (2010) is proposed to be 220,000 km 2 , the mid-term target (2030) is 400,000 km 2 . [0003] The regions with the most serious and concentrated desertification in my country are mainly ...

AI Technical Summary

Problems solved by technology

However, in arid sandy areas with little rainfall, especially in sandy areas where the annual rainfall is less than 200mm and the groundwater level is below 10m, such a large afforestation density cannot guarantee the long-term survival and protective effect of trees. Then it will increase, and after a few years, as the water stored in the sand dunes is exhausted, the trees will inevitably begin to decline and die, and finally lose their protective effect

Another current solution is to reduce the density of afforestation, and afforestation with a density of 3×4m can make the trees survive, but the effect of windbreak and sand fixation cannot be achieved due to the low cover degree after afforestation

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