Procyanidin inhibited N2O emissions from paddy soils by affecting nitrate reductase activity and nirS- and nirK-denitrifier populations
A 28-day microcosm experiment was conducted using three paddy soils (an alluvial paddy soil, a loess-formed paddy soil, and a yellow clayey paddy soil) to investigate the impact of procyanidin on N 2 O emissions and associated microbial mechanisms. The efficacy of procyanidin on N 2 O emissions vari...
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Published in: | Biology and fertility of soils 2021-10, Vol.57 (7), p.935-947 |
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Main Authors: | , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | A 28-day microcosm experiment was conducted using three paddy soils (an alluvial paddy soil, a loess-formed paddy soil, and a yellow clayey paddy soil) to investigate the impact of procyanidin on N
2
O emissions and associated microbial mechanisms. The efficacy of procyanidin on N
2
O emissions varied among the paddy soils tested, with an average inhibition rate ranging from 2.7% in the alluvial paddy soil to 57.1% in the loess-formed paddy soil. Furthermore, suppression of N
2
O emissions by procyanidin occurred alongside fluctuations in nitrate reductase activity and
nirS
- and
nirK
-type denitrifiers abundance. The correlation analysis indicates that nitrate reductase, clade I
nirS
-denitrifiers, clade I or II, and clade III
nirK
-denitrifiers were closely linked to N
2
O emissions. These findings provide evidence that procyanidin is capable of limiting N
2
O emissions in paddy soils by inhibiting nitrate reductase and different clades of
nirS
-/
nirK
-denitrifiers. |
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ISSN: | 0178-2762 1432-0789 |
DOI: | 10.1007/s00374-021-01576-y |