不同菜地土壤的铁氨氧化脱氮过程探究

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Abstract In this study, we measured the potential rates of feammox, denitrification and anammox by isotope tracer technique insoil samples collected from different vegetable plots. In addition, we also analyzed theirphysicochemical characteristics, and the composition of microbial community via Miseq high-throughput sequencing technology. The results showed that the feammox rates in the vegetable soil samples were significantly higher than those from the bare land. Moreover, there exists a significant relationship between the feammox rates and Fe(III)(r = 0.736, P < 0.05), and total organic contents (r = 0.575, P < 0.05). Additionally, five predominant iron-reducing genera (Bacillus, Pseudomonas, Acidiphilium, Alicyclobacillus, Clostridium) were detected among the different vegetable soil samples, and the relative abundance of iron-reducing bacteria was higher in the vegetable soil samples (1.38%~2.19%) than in bare land soil samples (0.75%). Feammox, denitrification and anammox were estimated to account for approximately 7.3%~12.4%, 53.1%~72.3% and 18.9%~36.4% of the total nitrogen removal, respectively. Overall, the results of this study indicate that feammox could be an important pathway for nitrogen removal in the vegetable fields.

Key words： feammox vegetable fields contribution to nitrogen removal iron reducing bacteria

Received: 06 January 2020

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X53

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	Articles by authors
	DING Bang-jing
	XU Meng-shan
	LI Dan-dan
	LUO Wen-qi
	QIN Yun-bin
	LI Zheng-kui

Cite this article:

DING Bang-jing,XU Meng-shan,LI Dan-dan等. Investigation of nitrogen removal by feammox in soils from different vegetable fields[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(8): 3506-3511.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I8/3506

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