多元复合调理剂对镉砷污染农田土壤微生物群落结构的影响

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Abstract The influence of multi-composite amendment (including limestone, iron powder, silicon fertilizer, and calcium magnesium phosphorus fertilizer, abbreviation for LISP) on soil basic physical and chemical properties, the bioavailability of Cd and As, and the microbial community structure were studied under greenhouse condition. The results showed that the LISP can change the soil basic physical and chemical properties, reduce the available content of Cd and As in soil, and change the soil microbial community structure. With the addition of 0.4% of LISP, soil pH, available phosphorus and total phosphorus were significantly (P<0.05) increased by 0.57units, 130.6%, and 18.38%, respectively, as compared with CK treatment, simultaneously soil available Cd and As content significantly (P<0.05) decreased by 21.76% and 16.39%, respectively. According to high-throughput sequencing results, LISP can maintain normal diversity and richness of the microbial community in the contaminated soil. However, LISP can significantly change the composition and structure of soil microbial community, especially increase the relative abundance of Firmicutes, Actinobacteria, and Planctomycetes, while decrease the relative abundance of Chloroflexi, Acidobacteria, and Verrucomicrobia in soil. Redundancy analysis and Mantel test showed that soil pH, available phosphorus, and available Cd and As were the main environmental factors to affect the soil microbial community structure. The results suggested that LISP is an effective and ecologically safe amendment for the remediation of paddy soil contaminated with Cd and As.

Key words： multi-composite amendment (LISP) Cd As paddy soil remediation microbial community structure

Received: 05 January 2021

PACS:	X172
	X53

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	ZENG Peng
	JIANG Yi
	GU Jiao-feng
	ZHOU Hang
	LIU Ya
	LIAO Bo-han

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ZENG Peng,JIANG Yi,GU Jiao-feng等. Effects of the multi-composite amendment on soil microbial community structure in Cd and As-contaminated paddy soil[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(8): 3740-3748.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I8/3740

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