Soil reconstitution substance as well as preparation method and application thereof

Abstract

The invention discloses a soil reconstitution substance. The soil reconstitution substance contains the following components in percentage by weight: 30%-70% of rock-soil stripped substance added withbiochar and 30%-70% of coal gangue as well as optional coal ash with a percentage less than or equal to 40%. According to the soil reconstitution substance, the rock-soil stripped substance, the coalgangue and/or the coal ash serve as surface soil replacement materials, and meanwhile, the biochar and/or a water-retaining agent are/is added, so that the fertility and water holding capacity of soil are improved, and besides, growth and development of crop roots can be stimulated. The invention further provides a preparation method and application of the soil reconstitution substance. Vegetations such as Panicum virgatum are preferably planted on the surface of the soil reconstitution substance, so that the survival rates of the vegetations are high, and the average plant height can be effectively increased. Therefore, the invention develops a whole set of methods suitable for preparing and improving reconstituted soil of mine lots in Inner Mongolia grassland and screening the vegetations.

Description

technical field [0001] The invention relates to the technical field of soil reconstruction, in particular to a soil reconstruction product and its preparation method and application. Background technique [0002] The soil in the grassland area of ​​Xilinhot, Inner Mongolia is mainly sandy loam, and the topsoil is thin and barren, which is an important factor restricting grassland productivity. The local average annual rainfall is 294.74mm, and the annual evaporation is 1759mm. The rainfall is mainly concentrated in June to August, accounting for 70% of the annual precipitation. Water and soil erosion is serious. It is a key protection area for water and soil erosion in the Inner Mongolia Autonomous Region, and the grassland ecological environment is fragile. The open-pit mining has caused serious damage to the already fragile grassland ecosystem, and land reclamation is an important means to solve this damage. The soil fertility in the eastern grassland area is poor, and th...

AI Technical Summary

Problems solved by technology

However, the use of a large number of topsoil replacement materials has resulted in poor soil fertility stat

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