In:
Frontiers in Environmental Science, Frontiers Media SA, Vol. 11 ( 2023-3-17)
Abstract:
Applying biochar to soil has been advocated as an effective measure to improve soil fertility and increase carbon (C) sequestration. Biochar is often co-applied with nitrogen (N) fertilizers in agricultural ecosystems, however, the interactive effects of biochar and N addition (BN) on soil greenhouse gases (GHGs) fluxes, soil C and N fractions, and yield has not been investigated. Here, we manipulated a global meta-analysis to explore the effects of biochar and N addition and their interaction on the GHGs, soil C and N fractions, and yield by assembling 75 articles. Results indicate that across all studies, biochar, N, and BN additions all increased soil CO 2 emissions (8.5%–29.6%), yield (4.2%–58.2%), soil organic C (SOC, 1.8%–50.4%), dissolved organic C (DOC, 2.7%–30.0%), and total N (TN, 6.8%–15.6%), but had no significant effect on CH 4 fluxes. Biochar addition reduced N 2 O emissions (−21.3%), global warming potential (GWP, −19.8%), greenhouse gas intensity (GHGI, −28.2%), NH 4 + (−17.8%) and NO 3 − (−10.7%), whereas N addition increased these indexes. The interaction effects of BN on CO 2 and N 2 O emissions, GWP, TN, and NH 4 + contents were antagonistic, while CH 4 emissions, DOC, MBC, NO 3 − , and yield exhibited synergistic responses. Notably, soil GHGs responses varied depending on geo-climatic factors, edaphic properties, biochar and N treatment parameters, and experimental scenarios. These findings indicate that the co-addition of biochar and N has the potential to mitigate climate change and improve yield, providing a valuable reference for the improvement of climate-smart agriculture.
Type of Medium:
Online Resource
ISSN:
2296-665X
DOI:
10.3389/fenvs.2023.1123897
DOI:
10.3389/fenvs.2023.1123897.s001
DOI:
10.3389/fenvs.2023.1123897.s002
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2023
detail.hit.zdb_id:
2741535-1
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