Effects of biochar and biogas residue amendments on N2O emission, enzyme activities and functional genes related with nitrification and denitrification during rice straw composting

被引：48

作者：

Wang, Nanyi ^{[1
]}

Awasthi, Mukesh Kumar ^{[2
]}

Pan, Junting ^{[3
]}

Jiang, Shilin ^{[1
,4
]}

Wan, Fachun ^{[5
]}

Lin, Xu ^{[1
]}

Yan, Binghua ^{[1
]}

Zhang, Jiachao ^{[1
]}

Zhang, Lihua ^{[1
]}

Huang, Hongli ^{[1
]}

Li, Hui ^{[4
]}

机构：

[1] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China

[2] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China

[3] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

[4] Hunan Acad Forestry, State Key Lab Utilizat Woody Oil Resource, Changsha 410029, Peoples R China

[5] Hunan Agr Univ, Coll Anim Sci & Technol, Changsha 410128, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2022年 / 357卷

关键词：

Biochar; Biogas residue; Functional gene; Enzyme activity; Composting; AMMONIA-OXIDIZING BACTERIA; NITROUS-OXIDE EMISSION; SEWAGE-SLUDGE; WASTE; TRANSFORMATION; COMMUNITY; REDUCE; ABUNDANCE; SOILS;

D O I：

10.1016/j.biortech.2022.127359

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study was carried out to determine the response characteristics of N2O emission, enzyme activities, and functional gene abundances involved in nitrification/denitirification process with biochar and biogas residue amendments during rice straw composting. The results revealed that N2O release mainly occurred during the second fermentation phase. Biogas residue amendment promoted N2O emission, while biochar addition decreased its emission by 33.6%. The nirK gene was abundant through composting process. Biogas residues increased the abundance of denitrification genes, resulting in further release of N2O. Biochar enhanced nosZ gene abundance and accelerated the reduction of N2O. Nitrate reductase (NR), nitrite reductase (NiR), N2O reductase (N2OR), and ammonia monooxygenase (AMO) activities were greatly stimulated by biochar or biogas residue rather than their combined addition. Pearson regression analysis indicated that N2O emission negatively correlated with ammonium and positively correlated with nosZ, nirK, 18S rDNA, total nitrogen, and nitrate (P < 0.05).

引用

页数：8

共 34 条

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[32] Wheat straw-derived biochar amendment stimulated N2O emissions from rice paddy soils by regulating the amoA genes of ammonia-oxidizing bacteria
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[33] Interactive effects of microplastics, biochar, and earthworms on CO2 and N2O emissions and microbial functional genes in vegetable-growing soil
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[34] Successive corn stover and biochar applications mitigate N2O emissions by altering soil physicochemical properties and N-cycling-related enzyme activities: A five-year field study in Northeast China
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