A method for reclamation of damaged land based on biomass materials

Abstract

The invention discloses a damaged soil rehabilitation method based on a biomass material; the method includes steps of collecting wood flour, crop straw, and animal dung; drying and smashing the materials; an then mixing the smashed wood flour and crop straw at equal mass and performing hydrothermal carbonization, and acquiring charcoal; putting the smashed animal dung in a reaction kettle; heating and stirring, and drying the animal dung; adding synergist, and forming biomass organic fertilizer. According to organic matter content of the rehabilitation soil, three rehabilitation schemes are formulated, wherein scheme 1 is to mix 0.5 t / ha of charcoal, 1 t / ha of organic fertilizer and surface soil layer mechanically and evenly; scheme 2 is to mechanically and evenly mix 1 t / ha of charcoal, 1 t / ha of organic fertilizer and surface soil layer; then apply 5 t / ha of wood flour and 5 t / ha of straw in an embedding manner; scheme 3 is to mechanically and evenly mix 1.5 t / ha of charcoal, 1.5 t / ha of organic fertilizer, 0.3 t / ha of fungicide and the surface soil layer; and then applying 5 t / ha of wood flour and 5 t / ha of straw in an embedding manner. Based on the reuse of the biomass material, the damaged soil is reclaimed, and realizes the recycle of waste material; the method is low in cost and can rapidly promote the soil fertility.

Description

technical field [0001] The invention relates to a method for reclamation of damaged land, in particular to a method for reclamation of damaged land based on biomass materials. Background technique [0002] China is a country with a large number of resources and a large population. There is a shortage of per capita land resources. China's land resources are very limited, and the per capita arable land is only 0.11hm 2 , less than 1 / 2 of the world's per capita arable land. In recent years, economic construction and natural disasters have damaged as many as one million mu of land. As of 2009, my country's natural disasters have damaged a total of 1,333,300 hm of land 2 The above, the relevant data show that industrial and mining accumulatively destroyed about 4 million hm of land 2 , and still at 40,000 hm per year 2 However, the reclamation rate of these damaged lands is only 12%, and the available arable land resources are far from meeting the needs of China's rapid social...

AI Technical Summary

Problems solved by technology

[0003] At present, land reclamation methods in my country mainly include topsoil stripping, shallow excavation, staggered backfilling, coal gangue filling, soil physical and chemical property reconstruction, etc., which have the disadvantages of large engineering volume and high cost, and the recovery of soil fertility after reclamation is slow. , and there are risks of soil pollution and reclamation failure