人工BSCs对稀土尾砂理化性质及抗蚀性的影响

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Abstract An ionic rare earth mine in Lingbei town, Dingnan county, Ganzhou city, Jiangxi Province, China, were taken as a study object. Biological soil crusts (BSCs) and tailings were collected and artificial BSCs were cultivated using crust-cuttings inoculation method. The effects of BSCs on the ionic rare earth tailings was analyzed by the comparison with a control without BSCs inoculation. After 300days of development of artificial BSCs, the effects of artificial BSCs growth and development on the dynamics of pH, bulk density, organic matter content, total and available content of other nutrients, mechanical composition as well as on soil erosion resistance and water retention capacity of the tailings were explored. The results showed that artificial BSCs could be cultivated in short time by crust-cuttings inoculation method, and improved the physical, chemical, and hydrological properties of the sample tailings, as compared with the control. After 300days of development of artificial BSCs, the SA (soil acidity) was significantly reduced, and the pH increased by 6.8% from 5.88 to 6.28; The SBD (soil bulk density) decreased by 11.6 %, and the OM (organic matter), TN (total nitrogen), AN (available nitrogen), TP (total phosphorus), AP (available phosphorus), TK (total potassium) and AK (available potassium) increased by 294%, 21.6%, 81.8%, 100%, 260%, 8.9% and 52.4%, respectively; The content of silt and clay increased a little; The soil erosion resistance and water retention capacity were both significantly improved. Therefore, artificial biological soil crusting could be an effective method for ecological restoration of ionic rare earth mines.

Key words： artificial biological soil crusts ionic rare earth tailings physical and chemical properties of soil soil erosion resistance water retention capacity

Received: 20 May 2020

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X53

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	Articles by authors
	WANG Jiang-ping
	DENG Yang-wu
	HUANG Jin
	WANG Hui-juan
	TANGChun
	TONGYao-yao
	CHEN Ming

Cite this article:

WANG Jiang-ping,DENG Yang-wu,HUANG Jin等. The effects of artificial biological soil crusting on the physical and chemical properties and erosion resistance of rare-earth mine tailings[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(1): 327-334.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I1/327

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