炉渣与生物炭施加对稻田土壤铁还原菌群落结构及甲烷排放影响

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Abstract

In order to explore the effects of slag and biochar application treatment on the community structure and methane emission of iron-reducing bacteria in paddy soil, applied three kinds of treatments, namely biochar, slag and biochar + slag, in a paddy field in Fuzhou to measure early and late paddy. The methane emission flux during the paddy growing season and the number of culturable iron-reducing bacteria were compared, and the difference between the composition of the iron-reducing bacteria and the community composition of the soil in the paddy field was compared. The application of waste could change the quantity of iron-reducing bacteria in paddy soil, and the number of iron-reducing bacteria in the late-season biochar application group was significantly higher than that in the other three groups (P<0.05); the waste was applied to a certain extent. Methane emissions from paddy soils were inhibited, and the early rice mixed application group had the most significant reduction in methane emissions. The iron-reducing bacteria in the paddy soil of Fuzhou Plain are rich in species, distributed in ten gates, of which Firmicutes and Proteobacteria are dominant bacteria, and the sum of abundance is greater than 95%. A total of 20genera were identified, among which the abundance of the genus Bacillus, Anaeromyxobacter, Clostridium and other ten genus, accounting for 62.07%~66.58% of the known iron-reducing genus in the sample; biochar and slag mainly by changing soil pH and water content, the community structure of iron-reducing bacteria in paddy soil was affected, and the effect of mixed application was more significant than single application. The number of Bacillus is significantly negatively correlated with the methane emission flux of paddy soil, and it is the main genus of iron reduction to inhibit methane production and emission.

Key words： iron reducing bacteria community composition methane waste paddy fields of Fuzhou Plain

Received: 05 November 2018

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X172

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	WANG Xiao-tong
	XU Xu-ping
	WANG Wei-qi

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WANG Xiao-tong,XU Xu-ping,WANG Wei-qi. Slag and biochar application on community structure and methane emission of iron-reducing bacteria in paddy soil[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(6): 2495-2505.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I6/2495

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