构树修复对重金属污染土壤环境质量的影响

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Abstract

Effects of Broussonetia papyrifera on the enzyme activities and microbial community structure of heavy metal-contaminated soil were studied using greenhouse experiment. Results showed that the enzyme activities and microbial diversity were obviously enhanced in contaminated soil with B. papyrifera remediation. Compared with the soil without B. papyrifera, the contents of sucrase and acid phosphatase in soil remediated with B. papyrifera were significantly (P< 0.05) increased by 3.12 and 2.29 times, respectively, after 270 days of cultivation. Meanwhile, the relationship was significantly (P< 0.05) negative between the content of dehydrogenase and available As, Cd, Pb, Zn and Cu, that of sucrase and available Cd, that of acid phosphatase and available Cd and Cu, respectively. According to 16S and 18S rDNA PCR-DGGE analyses, the diversities of bacteria and arbuscular mycorrhizal fungus in contaminated soil were enhanced with the growth of B. papyrifera. The results suggested that the biological quality in heavy metals contaminated soil could be effectively improved with B. papyrifera remediation. However, the content of available heavy metals was scarcely declined in contaminated soil for 270 days of cultivation. Therefore, it is necessary to improve the potential of ecological remediation for metals-contaminated soil by combining B. papyrifera with additional physical and chemical methods.

Key words： Broussonetia papyrifera phytoremediation heavy metal soil enzyme activity microbial community structure

Received: 30 November 2017

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	Articles by authors
	ZENG Peng
	GUO Zhao-hui
	XIAO Xi-yuan
	PENG Chi
	HUANG Bo
	XIN Li-qing

Cite this article:

ZENG Peng,GUO Zhao-hui,XIAO Xi-yuan等. Effect of phytoremediation with Broussonetia papyrifera on the biological quality in soil contaminated with heavy metals[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(7): 2639-2645.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I7/2639

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