Subsurface fertilization boosts crop yields and lowers greenhouse gas emissions: A global meta-analysis

The subsurface application (SA) of nitrogenous fertilizers is a potential solution to mitigate climate change and improve food security. However, the impacts of SA technology on greenhouse gas (GHG) emissions and agronomic yield are usually evaluated separately and their results are inconsistent. To...

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Bibliographic Details
Published in:The Science of the total environment 2023-06, Vol.876, p.162712-162712, Article 162712
Main Authors: Bhuiyan, Mohammad Saiful Islam, Rahman, Azizur, Loladze, Irakli, Das, Suvendu, Kim, Pil Joo
Format: Article
Language:English
Subjects:
Agriculture - methods
Ammonia
Carbon footprint
CH4
Deep placement
Fertilization
Fertilizers - analysis
Global Warming - prevention & control
Greenhouse Gases
GWP
Methane - analysis
N2O
Nitrogen
Nitrous Oxide - analysis
NO3
Nutrient uptake
Oryza
Soil
Yield
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Summary:The subsurface application (SA) of nitrogenous fertilizers is a potential solution to mitigate climate change and improve food security. However, the impacts of SA technology on greenhouse gas (GHG) emissions and agronomic yield are usually evaluated separately and their results are inconsistent. To address this gap, we conducted a meta-analysis synthesizing 40 peer-reviewed studies on the effects of SA technology on GHG and ammonia (NH3) emissions, nitrogen uptake (NU), crop yield, and soil residual NO3-N in rice paddies and upland cropping system. Compared to the surface application of N, SA technology significantly increased rice yields by 32 % and crop yield in upland systems by 62 %. The largest SA-induced increases in crop yield were found at low N input rates (
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2023.162712