Method for governing deserts by utilizing vegetal modified sand

Abstract

The invention discloses a method for governing deserts by utilizing vegetal modified sand. The vegetal modified sand is paved on the surface of a desert to be governed, and is formed by dissolving a water-soluble solid organic matter in water to form a cohesive and adhesive solution, and mixing the cohesive and adhesive solution with plant seeds and sand; after moisture evaporates, the water-soluble solid organic matter can bond sand, and can be dissolved in water again after meeting water to form the cohesive and adhesive solution to bond sand. According to the invention, common sand can serve as soil; the interaction among sand grains is changed fundamentally; a particle pore structure with binding force (sticking force) is formed; materials cannot run off easily due to the cohesive and adhesive properties; the vegetal modified sand can be as stable as soil, and can store water and nutrients as soil; plants can grow directly after the vegetal modified sand is mixed with the plant seeds. Therefore, the method provides a solid condition for tree growth, and is an ideal desert governing measure.

Description

technical field [0001] The invention relates to the fields of utilization of sandy soil resources and control of land desertification, in particular to a method for controlling sandy land by using modified sandy soil with soil properties. Background technique [0002] Sandy soil refers to soil with a lot of sand. The sandy soil is loose and has good water permeability and air permeability, but its ability to retain water and fertilizer is poor, so it needs to be improved during cultivation. Sandy soil is not suitable for the growth of certain plants. When the sand content is high, it is similar to the surface sand or sandy soil in deserts or desertified areas. In addition to natural existence, sandy soil is mostly formed by land desertification. [0003] (1) Desertification and its hazards [0004] Desertification is the most serious major environmental problem facing mankind today. [0005] The land area of ​​the world is 162 million square kilometers, accounting for 30....

AI Technical Summary

Problems solved by technology

However, emulsified asphalt also exists during use because the asphaltene and resin in the asphalt are easily destroyed by oxygen, light, heat, moisture and microorganisms in the atmosphere, and the oil content decreases.

The gradual intensification of this change will lead to the deterioration of asphalt performance, such as the increase of softening point, the decrease of penetration, and the decrease of elongation, so that the united layer gradually becomes brittle, hard, loses plasticity, ages, and eventually cracks and dies. Destroyed by wind erosion, losing sand-fixing effect

[0022] (3) Fundamental difficulties and existing problems in desertification control

However, the particles in the sand are discrete particles, and the fundamental difficulty in governance is that the particles in the sand are easy to move, difficult to retain water and store nutrients

Based on the current sand control measures, it is not difficult to find that the existing sand and desert control methods are far from fundamentally solving the two problems of easy movement of particles in sand and difficulty in water retention and storage of nutrients.

[0024] The existing sand control methods are the same as the desert control methods, mainly focusing on sand fixation. Regardless of the use of engineering (mechanical) measures, plant measures and chemical measures, they do not start from improving the properties of the sand itself, but only avoid the harm caused by the movement of sand. Therefore, from the point of view of its methods and methods, it is still passive sand control, which can overcome the problem of desertification to a certain extent or in a short period of time, but it is difficult to fundamentally solve the problem of sandy soil that is difficult to retain water and store nutrients. There is still a long way to go in "sand turning oasis"

[0025] ①Engineering (mechanical) measures can temporarily change the physical form (natural existence mode) of desert or sandy soil. It is a temporary sand prevention measure. For the hazards of quicksand and sandy soil, it only plays the role of sand-fixing and "curing the surface". The sand is tamed for a short time and cannot achieve the effect of "curing the root cause". After a long time, the sand will still return to its original appearance

[0030] Plant sand fixation uses the upper part of the plant to block and block sand, and uses the root of the plant to fix sand, which can change the microclimate and micro soil environment to a certain extent. However, the fundamental difficulty of plant sand fixation is that the sand itself is not conducive to plant growth, such as sandy soil is unstable and Frequent wind and sand movement, poor sandy soil, insufficient water and difficulty in water retention and temperature adjustment all have adverse effects on plants

[0031] Wind and sand movement can cause plants to be harmed by blowing erosion, sand burial, and sand cutting. Wind and sand movement can be solved by engineering protection measures and chemical sand fixation. However, the fundamental problem of insufficient water in the sand and difficulty in water retention limits the applicability of traditional plant sand fixation. greatly restricted