eprintid: 12026
rev_number: 12
eprint_status: archive
userid: 3178
dir: disk0/00/01/20/26
datestamp: 2022-12-08 05:33:25
lastmod: 2022-12-08 05:33:25
status_changed: 2022-12-08 05:33:25
type: article
metadata_visibility: show
creators_name: Liu, X
creators_name: Li, Q
creators_name: Liu, M
creators_name: Jia, S
creators_name: Hossain, M E
creators_name: Li, Y
creators_name: Liu, E
creators_name: Dong, W
creators_name: Rachit, S
creators_name: Gopalakrishnan, S
icrisatcreators_name: Gopalakrishnan, S
icrisatcreators_name: Rachit, S
country: China
title: Responses of N2O emissions to straw addition under different tillage soils: A 15N labelling study
ispublished: pub
subjects: S40006
divisions: GRP_ACI
full_text_status: none
keywords: No-tillage, Conventional tillage, 15N-labelled straw, N2O emissions, Nitrification and denitrification gene, Abundance
note: This work was supported by the National Key Research and Development
Program of China (2021YFE0101300), the National Natural
Science Foundation of China (grant no. 31961143017 and 31470556),
and the Bio-Water Saving and Dry Farming Innovation Team Project of
CAAS.
abstract: Nitrous oxide (N2O) emissions contribute to global climate change and are regulated by the intensities of N
mineralization, nitrification and denitrification processes. These processes depend on soil management, e.g.,
tillage and straw addition. Microbial mechanisms underlying the effects of straw addition on N2O emissions were
investigated by 56-day incubation of soil from a long-term (27-year) no-tillage (NoTill) and conventional tillage
(ConvTill) field experiment. The abundance of N functional genes (amoA, amoB, nirK, nirS and nosZ) in no-tillage
and conventional tillage soils was analysed based on straw addition. The application of 15N-labelled straw
allowed us to trace N2O sources. Conventional tillage with 15N-labelled straw (ConvTill+Straw) reduced N2O
emissions derived from soil by 42 %, whereas no-tillage with 15N-labelled straw (NoTill+Straw) reduced N2O
emissions by only 8 % compared with soil without straw addition. The N2O emissions derived from straw were
higher under NoTill+Straw than under ConvTill+Straw, whereas they accounted for only ~4 % of the total N2O
emissions under both conditions. The nirK and nirS gene abundances were higher than those in soil without straw
addition. Compared to that under ConvTill, the nosZ gene abundance was higher and the N2O emissions were 40
% lower under ConvTill+Straw, indicating its strong capacity to reduce N2O to N2. Pathway analysis showed that
gene (amoA and nirK) abundance combined with soil properties (particulate organic matter nitrogen (POMN) and
NO3
date: 2022-11-22
date_type: published
publication: Applied Soil Ecology (TSI)
volume: 183
number: 104744
publisher: Elsevier
pagerange: 1-9
refereed: TRUE
issn: 0929-1393
official_url: https://doi.org/10.1016/j.apsoil.2022.104744
related_url_url: https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=10.1016%2Fj.apsoil.2022.104744&btnG=
related_url_type: pub
citation:   Liu, X and Li, Q and Liu, M and Jia, S and Hossain, M E and Li, Y and Liu, E and Dong, W and Rachit, S and Gopalakrishnan, S  (2022) Responses of N2O emissions to straw addition under different tillage soils: A 15N labelling study.  Applied Soil Ecology (TSI), 183 (104744).  pp. 1-9.  ISSN 0929-1393