A microbial compound bacterial agent and method for improving the survival rate of afforestation in abandoned coal gangue land

Abstract

The present invention discloses a microbial compound bacterium agent and method for improving coal gangue wasting land afforestation survival rate. 1 * 109-8 * 109CFU / ml of gum Bacillus bacteria GIM1.15 bacterial liquid, 6 * 108-3 * 109CFU / ml of Trichoderma harzianum GIM3.442 bacterial liquid, 3 * 109-9 * 109CFU / ml of nitrogen-fixing Rhodospirillum photometricum CGMCC 1.5023 bacterial liquid, 2 * 108-9 * 108CFU / ml of Pseudomonas fluorescens GIM1.209 bacterial liquid and 8 * 108-6 * 109CFU / ml of huge Bacillus bacteria GIM1.270 bacterial liquid are mixed in volume ratio of 1.5- 6: 0.8- 2: 0. 5-3:1-3:1. 5-5 to form a mixed bacterial liquid; then modified starch and rice husk charcoal are mixed in volume ratio of 1-5:9 to be use as a bacterial liquid adsorbent, then the mixed bacterial liquid is inoculated onto the bacterial liquid adsorbent in the volume ratio of 5-20: 100 of the mixed bacterial liquid to the bacterial liquid adsorbent; and the microbial compound bacterium agent can be obtained by even stirring and spray-drying. The microbial compound bacterium agent can significantly improve the coal gangue wasting land afforestation survival rate, thus promoting rapid revegetation of a coal gangue wasting land, and the microbial compound bacterium agent has good prospects in the field of ecological restoration of the coal gangue wasting land.

Description

Technical field: [0001] The invention belongs to the technical field of ecological restoration of abandoned mines, and specifically relates to a microbial composite microbial agent and a method for improving the survival rate of afforestation in coal gangue abandoned land. Background technique: [0002] A large amount of coal gangue is produced in the process of coal mining. Generally, about 10%-30% of coal gangue is associated with every 1 ton of coal mined. Coal gangue has become one of the largest industrial waste residues in my country. The accumulation of coal gangue not only takes up a lot of land, but also pollutes the surrounding environment, such as soil and vegetation pollution. The soil bulk density of the weathered layer of coal gangue hills is relatively large, and the porosity is relatively small, which makes the water holding capacity poor and low effective water content compared with normal soil, which directly affects the normal growth of plants. At the same tim...

AI Technical Summary

Problems solved by technology

The regolith soil of coal gangue hills has a large bulk density and small porosity, which makes it have poor water holding capacity and low effective water content compared with normal soil, which directly affects the normal growth of plants.

At the same time, the strong acid environment is conducive to the release of heavy metals and other substances in coal gangue, which will also affect the survival and growth of plants.

Coal gangue piles are piled up by gangue, lack of animal and microbial activities, which delays the ripening speed of surface coal gangue and weathered matter, is not conducive to the improvement of its physical structure, and restricts the growth and development of plants

Therefore, in the ecological restoration process of coal gangue wasteland, it faces harsh conditions such as extreme lack of plant nutrition, high temperature, water shortage, acid damage, salt damage and heavy metal stress, which makes the survival rate of afforestation low

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