Green composite material for ecological improvement and restoration of sandy soil as well as preparation method and application of green composite material

Abstract

The invention discloses a green composite material for ecological improvement and restoration of sandy soil as well as a preparation method and application of the green composite material. The green composite material comprises the following components in parts by weight: 40-90 parts of a leguminous extract, 5-30 parts of a grain fermentation product, 2-20 parts of biochar and 2-20 parts of a material rich in mineral elements. The green composite material disclosed by the invention can change the dispersion condition of sandy soil from a physical structure to form a knot layer with certain thickness and mechanical strength, so that the physicochemical properties of the sandy soil are improved, the nutritional ingredients of the sandy soil are increased, the water retention and fertilizer retention effects of the sandy soil are good, the micro-ecological structure of the sandy soil is finally promoted and improved, ecological improvement and restoration of degraded sandy soil are achieved, use value is high, and application prospect is good. The preparation method has the advantages that the synthesis method is simple and convenient, the raw material cost is low, the energy consumption is low, the time consumption is short, the conditions are easy to control and the like, and the method is suitable for continuous large-scale batch production and is convenient for industrial utilization.

Description

technical field [0001] The invention belongs to the fields of desert utilization and protection and land desertification control, and relates to a green composite material used for ecological improvement and restoration of sandy soil and its preparation method and application. Background technique [0002] Deserts mainly refer to barren areas where the ground is completely covered by sand, with very few plants, little rain, and dry air. The land area on the earth is 162 million square kilometers, accounting for 30.3% of the total area, of which 48 million square kilometers are arid and semi-arid desert areas, and they are rapidly expanding at a rate of 60,000 square kilometers per year. . [0003] Land desertification: Refers to arid and semi-arid areas, where the ecological system is destroyed due to the influence of natural factors and human activities, resulting in changes similar to the desert environment in the original non-desert areas. The harms caused by land deser...

AI Technical Summary

Problems solved by technology

(2) Affect public transportation safety: severe wind and sand will reduce visibility and force airports and highways to stop

(4) Soil productivity is severely degraded: wind erosion of soil is one of the main reasons for land desertification

Due to the effect of wind erosion, large soil particles will be broken into small particles, so the organic matter in the soil will also be seriously lost, resulting in a decline in fertility

(5) Wind and sand movement is a natural process in desert ecosystems, but it also causes dunes to move in formation, surface wind erosion, sand cutting, sand burial, and dust release, etc. The heritage has caused serious harm, which greatly aggravates the occurrence of disastrous weather such as land desertification and sandstorms, and is likely to cause great economic losses

However, the climate in desert or sandy soil areas is dry, with drastic changes in cold and heat, strong wind and sand, and the natural environment is very harsh, especially under the condition of no irrigation. In a particularly dry year, due to lack of water, the planted plants will not grow well. Or a large number of dead, so the fundamental difficulty of plant sand fixation is that the sand itself is not suitable for the growth of plants, therefore, the effectiveness of plant sand fixation is limited by the characteristics of sand soil and the natural environment

[0006] (2) Engineering protection uses structures such as grass grids and windbreak walls to reduce the wind speed or cover the sand surface to prevent wind and sand flow. The main methods are: setting up high vertical sand barriers, setting grass grids and other types, with engineering measures and simple operation , quick effect and other advantages, but it cannot be protected for a long time, so engineering protection is mainly a measure to assist phytoremediation

Although the phenomenon of sandy soil can be improved in the short term, it has not fundamentally solved the problem of water and fertilizer retention in sandy soil

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