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Using ryegrass to assist tailings restoration and the method of planting ryegrass on the repaired ground

A technology of ryegrass and rye, applied in the direction of soil preparation methods, botany equipment and methods, applications, etc., can solve the problems of tailings environmental pollution, etc., and achieve the effects of strong operability, promoting plant growth, and improving tailings fertility

Active Publication Date: 2018-02-27
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to address the defects of the prior art and tailings environmental pollution problems, one is

Method used

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  • Using ryegrass to assist tailings restoration and the method of planting ryegrass on the repaired ground

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: A method of using ryegrass as green manure to assist tailings ecological restoration.

[0034] Plow and level the tailings at a depth of 20cm;

[0035] Collect fresh ryegrass grown to the flowering stage, and cut the fresh ryegrass into pieces of 4 cm to form ryegrass green manure;

[0036] According to the weight ratio of the dry weight of the ryegrass green manure to the air-dried weight of the tailings, the ryegrass green manure is spread on the plowed and leveled tailings land, and the spreading amount of the ryegrass green manure is 1% to 5%. Fully mix the ryegrass green manure and the tailings to form a flat planting ground.

[0037] Ryegrass green manure can also be applied in conjunction with other fertilizers or amendments.

[0038] The ryegrass green manure is applied in combination with fertilizers, 20-25 kg of calcium magnesium phosphate fertilizer is used as the base fertilizer, and 4-8 kg of urea is applied per mu, and it is applied at the ...

Embodiment 2

[0040] Embodiment 2: ryegrass-assisted tailings restoration and the method of planting ryegrass on the restoration ground

[0041] The specific sowing method is:

[0042] a. Seed treatment: sterilize the ryegrass seeds with a disinfectant, soak the seeds, and accelerate germination;

[0043] b. Sowing: In the planting area, build ridges with a width of 1 m, the distance between the ridges is about 0.3~0.5 m, and the height of the ridges is 8~10 cm. After the ridge surface is leveled, the row spacing is 0.2~0.3 m. About m, the depth of the sowing ditch is 4-6 cm, and the ryegrass seeds are sown in the sowing ditch by drill, the sowing rate is 2-3 kg per mu, and the surface of the sowing ditch is covered with 2-3 cm of soil after sowing. No human intervention is required during ryegrass growth.

[0044] c. Regular stubble harvesting and returning to the field: the first crop of ryegrass grows to about 50 days and the stubble is harvested. The stubble of the ryegrass is about 5...

Embodiment 3

[0046] Embodiment 3: the method for planting ryegrass on the repaired lead-zinc tailings

[0047] After plowing and leveling the surface of the lead-zinc tailings to a depth of 20 cm, the fresh ryegrass that has grown to the flowering stage is cut into pieces of about 3 cm and then fully mixed with the tailings. The application rates of ryegrass were 1%, 2% and 4% (dry weight of ryegrass / dry weight of tailings). Then plant ryegrass. The growth process of ryegrass does not require human intervention, and management such as planting and harvesting is carried out in accordance with local conventional methods. The ryegrass was harvested after 50 days of growth, and samples of ryegrass and tailings were collected to analyze some of their physical and chemical properties.

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Abstract

A method for assisting in tailings restoration through ryegrass and planting the ryegrass on restored land includes the following steps that tailings is turned over by 18-22 cm and leveled; fresh ryegrass growing to the florescence are shorn into broken segments being 3-5 cm long so that ryegrass green manure can be formed; the ryegrass green manure is spread on the tailings land which is turned over and leveled, and the ryegrass green manure and the tailings are fully mixed evenly so that smooth planting land can be formed; ryegrass seeds are sown on the planting land. The planting method includes the steps that the seeds are processed and sown; the ryegrass is harvested regularly while stubble is left and the harvested ryegrass is returned to the field, 3-5 years after the ryegrass is planted, the whole ryegrass plants are recycled, the land is turned over, then, ridges are reconstructed for planting, and the plating method is repeated in this way. Due to the virtuous cycle that the planted ryegrass is returned to the field, the ecological environment can be continuously improved, and the landscape phenomenon of the tailings can be improved. The method has the advantages that operability is high and ecologically friendly and restoration cost is substantially reduced and the method is an important measure for ecological restoration of the tailings.

Description

technical field [0001] The invention relates to tailings ecological restoration and a method for planting plants on the restoration ground, in particular to a method for using ryegrass green manure to assist tailings restoration and planting ryegrass on the restoration ground. Background technique [0002] While the development of mineral resources provides important strategic resources for the country, it also causes serious consequences of environmental pollution. According to statistics, 0.9 tons of tailings will be formed when mining 1 ton of metal ore, and the amount of tailings can account for 30% of the total industrial solid waste. The accumulation of tailings not only pollutes the land occupied by tailings ponds with heavy metals, but also the tailings often spread continuously with wind and water as carriers, and enter organisms through the geochemical chain and food chain, which affects the ecological security and safety of the mining area and its surrounding area...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00
CPCA01B79/02A01G20/00A01G22/00
Inventor 李富平周征艾艳君谷海红袁雪涛卢倩倩迟晓杰
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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