Preparation method for modified sand soil

Abstract

The invention disclose a preparation method for a modified sand soil, which comprises the following steps: water-soluble solid state organic substance is dissolved in water to form solution with cohesiveness and adhesion, and the solution is mixed with sand soil. According to the method, after the water is evaporated, the water-soluble solid state organic substance can bond sand soil particles, and dissolve in water again to form the solution with the cohesiveness and the adhesion to bond the sand soil particles; the modified sand body allows a common sand soil to be in 'pedogenesis', changes the interaction relation between sand soil particles, and forms a particle pore structure with binding force (cohesive force); when the modified sand body is in the use process, the substance is difficult to run off due to the characteristics of the cohesiveness and the adhesion; the sand soil is allowed to have same properties of stabilizing and storing moisture and nutrient as the properties of the soil, so as to be able to provide strong conditions for the growing of plants, and be an ideal measure for the governing of sand soil and deserts; meanwhile, the modified sand soil can also be taken as a means to utilize sand resources of a sand beach, a sand, and the like to conduct plant planting.

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 production method capable of obtaining modified sandy soil with soil characteristics. 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, which mainly focus 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 and sand. Therefore, from the point of view of its methods and methods, it is still a passive governance, 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 deserts and sandy soils. It is a temporary sand prevention measure. For the harm of quicksand, it only plays the role of sand-fixing and "curing the surface". The sandy soil is short-lived. If it is tamed, it cannot achieve the effect of "curing the root cause". After a long time, the sandy soil will still return to its original appearance

[0030] Plant sand fixation uses the upper part of the plant to block sand and 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 desert and sand itself are not conducive to plant growth, such as sandy soil is unstable. Moreover, frequent wind and sand movement, poor sandy soil, insufficient water and difficulty in water retention and temperature adjustment will have adverse effects on plants.

[0031] Wind and sand movement can cause plants to be harmed by blowing erosion, sand burial and sand cutting. The 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. extremely restrictive