Method of ecologically restoring red mud stacking area by utilization of Arundo donax

A technology for ecological restoration and red mud piles, applied in the fields of land preparation methods, botanical equipment and methods, applications, etc., can solve problems such as red mud piles that have not yet been found, achieve simple and easy colonization process, improve physical and chemical properties, and reduce salt. effect of alkali

Inactive Publication Date: 2017-07-07
GUANGXI INST OF BOTANY THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phyllostachys arundis is resistant to salt and alkali, but there is no report on using it to restore red mud stockpiles ecologically

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In April 2016, purchase 30cm×25cm (diameter×height) flower pots (with trays), first add organic fertilizer (pig manure) 8-10cm thick, then add red mud 8-10cm thick, and then mix reeds with soil Bamboo bag seedlings and ryegrass bag seedlings (one of which is planted in the middle of the flower pot, 4 bags of ryegrass seedlings are planted around the reeds), and finally add red mud until it is about 1cm below the mouth of the pot and proceed as usual Watering management. Among them, the red mud was collected from the red mud storage yard of Guangxi Branch of Aluminum Corporation of China (pH 11.76, organic matter content 6.37g·kg -1 ).

[0021] After 3 months of routine management, both arundinacea and ryegrass grew well. The average height of arundinacea was 1.5m and the height of ryegrass was 30cm. Take the red mud from the rhizosphere of Arundo arundinacea. The measured pH value is 9.47-10.09 and the organic matter content is 23.70-27.84g·kg -1 .

Embodiment 2

[0023] In this example, the red mud storage yard of the Guangxi Branch of Aluminum Corporation of China Limited (west of Pingguo County, Baise City) was taken as the research object. The red mud storage yard occupies 1,200 mu in the first phase, 900 mu in the second phase, and 2000 in the third phase. mu.

[0024] In order to reduce the amount of red mud and increase the storage height, the company adopts dry storage. The red mud of this storage method is strongly alkaline (pH 11-12), and the organic matter content is extremely low (5-7g kg -1 ), and it is hard, easy to harden, poor water permeability, large temperature difference between day and night, etc., which is very unfavorable to the survival and growth of plants. To this end, the company adopted the planting technology of foreign soil. The selected plants were mainly Wedelia chrysanthemum. In addition, some species of reed, Imperata cylindrica, Albizia julibrissin were also tried to grow. These plants are either invasive...

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PUM

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Abstract

The invention discloses a method of ecologically restoring a red mud stacking area by utilization of Arundo donax. The method comprises the steps of digging field planting pits in the red mud stacking area, applying organic fertilizer to the field planting pits, then backfilling partial red mud, planting Arundo donax on the backfilled red mud, and finally backfilling the red mud and treading down. The method preferably comprises the step of planting ground cover plants at the periphery of the Arundo donax when planting the Arundo donax on the backfilled red mud. Through planting the Arundo donax on the red mud stacking area, the red mud stacking area can be ecologically restored, economic benefits can also be provided, and the win-win purpose of economic benefit and ecological environment benefit is achieved.

Description

Technical field [0001] The invention relates to an ecological restoration method for a red mud storage yard, in particular to a method for ecological restoration of a red mud storage yard by using reed bamboo. Background technique [0002] Red mud is the red waste slag discharged after alumina is extracted from bauxite. Affected by the production process, the red mud is strongly alkaline (pH 10-12), and its emissions are huge. At present, China’s annual emissions are up to 40 million tons. Due to the difficulty of resource utilization, red mud is mainly stored in the open air, which not only occupies a lot of land, but also easily pollutes the surrounding ecological environment through dust dispersion or liquid seepage, which seriously affects industrial and agricultural production and regional ambient air quality. Therefore, while actively seeking ways to comprehensively utilize red mud, it is urgent to explore effective ecological restoration methods and technologies. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00A01B79/02
CPCA01B79/02A01G22/00
Inventor 廖建雄莫凌张德楠蒲高忠黄玉清曾丹娟
Owner GUANGXI INST OF BOTANY THE CHINESE ACAD OF SCI
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