Effects of Exogenous Silicon Addition on Nitrification and Denitrification-Derived N 2 O Emissions from Moso Bamboo ( Phyllostachys edulis ) Forest Soil

Jie Yang, Kecheng Wang, Lijun Liu, Yongchun Li, Jiasen Wu, Jinhuan Zhong, Rong Zheng, Lili Fan, Chengpeng Huang () and Peikun Jiang ()
Additional contact information
Jie Yang: School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China
Kecheng Wang: School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China
Lijun Liu: School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China
Yongchun Li: School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China
Jiasen Wu: School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China
Jinhuan Zhong: School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China
Rong Zheng: Fujian Academy of Forestry, Fuzhou 350012, China
Lili Fan: Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China
Chengpeng Huang: School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China
Peikun Jiang: School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China

Land, 2025, vol. 14, issue 5, 1-18

Abstract: It has been reported that applying silicon (Si) to agricultural soils can reduce N 2 O emissions. But, we do not fully understand how this might work in forest ecosystems, especially in Phyllostachys edulis plantations. This study set out to determine how exogenous Si impacts soil nitrification and denitrification. Also, it aimed to assess their separate contributions to N 2 O emissions. A pot incubation experiment that lasted 28 days was carried out under controlled conditions. The soil used was collected from a bamboo plantation that is intensively managed. The treatments included adding silicon. Also, 3,4-dimethylpyrazole phosphate (DMPP) and acetylene (C 2 H 2 ) were applied to specifically hold back nitrification and denitrification. We measured the rates of soil N 2 O emissions, the cumulative fluxes, and the concentrations of NH 4 + -N, NO 3 − -N, and NO 2 − -N. A positive correlation that was significant ( p < 0.05) was found between N 2 O emissions and the levels of soil NO 3 − -N. Adding Si continued to reduce both the emission rate and the cumulative flux in all of the treatment groups. Also worth mentioning is that the relative contribution of denitrification to N 2 O emissions dropped from 38.2% to 11.4%. Meanwhile, nitrification’s contribution went up from 61.8% to 88.6%. These findings show that adding Si mainly suppresses denitrification. And, by doing so, it lessens N 2 O emissions in bamboo plantations. This study underlines the potential of Si amendments. They could be used as an effective management strategy to reduce greenhouse-gas emissions in forest soils. It also provides a scientific basis for making Phyllostachys edulis ecosystems more sustainable.

Keywords: nitrous oxide; Si amendment; soil nitrogen transformation; microbial pathways; greenhouse-gas mitigation (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2073-445X/14/5/1004/pdf (application/pdf)
https://www.mdpi.com/2073-445X/14/5/1004/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jlands:v:14:y:2025:i:5:p:1004-:d:1649779

Access Statistics for this article

Land is currently edited by Ms. Carol Ma

More articles in Land from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().