Sand control method using modified sand soil for tree planting

Abstract

The invention discloses a sand control method using modified sand soil for tree planting. The modified sand soil as a basis of the growth of trees is paved on sand which is to be controlled. The modified sandy soil is formed by stirring and mixing of a solution having a caking property and adhesivity and sandy soil, wherein the solution is formed by dissolving water-soluble solid organic matters in water. After the water is evaporated, the water-soluble solid organic matters can conglutinate grains of the sand soil, and when the water-soluble solid organic matters meet the water, the solid organic matters can again dissolve in the water to form the solution having the caking property and adhesivity, and the grains of the sand soil are conglutinated. Through use of the modified sandy soil, interaction relationship among the grains of the sand soil can be fundamentally changed, and a grain-pore structure having bonding force (cohesive force) is formed. Trees can be directly planted in the modified sandy soil. In the course of use of the modified sandy soil, matters are hard to lose due to the characteristics of the caking property and adhesivity, so that the modified sand soil has soil-like stability and water and nutrient storing properties, can be directly used as a basis of tree planting, can provide solid conditions for plant growth, and is an ideal measure for sand control.

Description

Technical field [0001] The invention relates to the field of sand and soil resource utilization and land desertification control, in particular to a method of using modified sand with soil characteristics to raise trees and control sand. Background technique [0002] Sandy soil refers to soil with a lot of sand. Sandy soil is loose and has good water 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. In the case of high sand content, it is similar to the surface sand or sandy soil in deserts or desertified areas; sandy soil is mostly formed by land desertification in addition to its natural existence. [0003] (1) Desertification and its harm [0004] Desertification is the most severe environmental problem facing humanity today. [0005] The world's land area is 162 million square kilometers, accounting for 30.3% of the total area of ​​the earth, of...

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 engineering (mechanical) measures, plant measures and chemical measures, they do not start from improving the properties of the sand itself, but only avoid the movement of sand bodies. 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 that sandy soil is difficult to retain water and store nutrients. There is still a long way to go for the "sand and soil into an oasis" that people hope

[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, it only plays the role of sand-fixing and "curing the surface". Sandy soil is short-lived. If it is tamed, it 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