不同种类食细菌线虫对石油污染土壤微生物的影响

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Abstract

The effects of different species of bacterial-feeding nematodes on soil microbial activity and diversity in oil-contaminated soil were studied in an effort to provide a preliminary theoretical basis and a new research perspective for the bioremediation of oil-contaminated soil. Five treatments were set up in our experiment:nematode-free soil (NFS), oil-contaminated soil (SP), oil-contaminated soil + Caenorhabditis elegans (SPN1); oil contaminated soil + Cephalobus persegnis (SPN2); oil contaminated soil + Rhabditis marina (SPN3). After 168d of the experiment, the findings were as follows:the soil basal respiration and microbial biomass carbon of SP increased due to oil pollution, while the activities of urease and sucrase decreased, and the richness, diversity index and evenness index of microorganisms decreased too. Compared with SP, the basal respiration of SPN1, SPN2 and SPN3 inoculated with nematodes increased, while the microbial biomass carbon decreased by 34.59% to 72.48%, and the sucrase activity increased by 15.66% to 22.89%. Relative to 0d, the microbial richness (S) of SP, SPN1, SPN2 and SPN3 decreased by 5, 7.25, 2.5 and 9.75, respectively, and the shannon-wiener index (H') decreased by 0.18, 0.15, 0.15 and 0.23. The results demonstrated that different species of bacterial-feeding nematodes helped to improve the microbial activity in oil-polluted soil and enhance the oil degradation through predation.

Key words： soil oil pollution bacterial-feeding nematodes soil enzyme activity microbial diversity

Received: 25 June 2019

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X53

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	Articles by authors
	ZHOU Ji-Hai
	TANG Jia-Jie
	GAO Ru-ru
	YANG Hong-Fei
	CHENG Hong
	LIU Jia-Li
	YUAN Ying-Hong

Cite this article:

ZHOU Ji-Hai,TANG Jia-Jie,GAO Ru-ru等. Effects of different speices of bacterial-feeding nematodes on soil microorganisms in oil-contaminated soils[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(1): 357-364.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I1/357

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