Eco-friendly yield-scaled global warming potential assists to determine the right rate of nitrogen in rice system: A systematic literature review

Mohammad Saiful Islam Bhuiyan; Azizur Rahman; Gil Won Kim; Suvendu Das; Pil Joo Kim

doi:10.1016/j.envpol.2020.116386

Eco-friendly yield-scaled global warming potential assists to determine the right rate of nitrogen in rice system: A systematic literature review

Environ Pollut. 2021 Feb 15:271:116386. doi: 10.1016/j.envpol.2020.116386. Epub 2020 Dec 24.

Authors

Mohammad Saiful Islam Bhuiyan¹, Azizur Rahman², Gil Won Kim³, Suvendu Das³, Pil Joo Kim⁴

Affiliations

¹ Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, South Korea; Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.
² School of Computing and Mathematics, Charles Sturt University, Wagg Wagga, NSW 2678, Australia.
³ Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, South Korea.
⁴ Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju, 660-701, South Korea; Division of Applied Life Science, Gyeongsang National University, Jinju, 660-701, South Korea. Electronic address: pjkim@gnu.ac.kr.

PMID: 33388675
DOI: 10.1016/j.envpol.2020.116386

Abstract

Rice paddies are one of the largest greenhouse gases (GHGs) facilitators that are predominantly regulated by nitrogen (N) fertilization. Optimization of N uses based on the yield has been tried a long since, however, the improvement of the state-of-the-art technologies and the stiffness of global warming need to readjust N rate. Albeit, few individual studies started to, herein attempted as a systematic review to generalize the optimal N rate that minimizes global warming potential (GWP) concurrently provides sufficient yield in the rice system. To satisfy mounted food demand with inadequate land & less environmental impact, GHGs emissions are increasingly evaluated as yield-scaled basis. This systematic review (20 published studies consisting of 21 study sites and 190 observations) aimed to test the hypothesis that the lowest yield-scaled GWP would provide the minimum GWP of CH₄ and N₂O emissions from rice system at near optimal yields. Results revealed that there was a strong polynomial quadratic relationship between CH₄ emissions and N rate and strong positive correlation between N₂O emissions and N rate. Compared to control the low N dose emitted less (23%) CH₄ whereas high N dose emitted higher (63%) CH₄ emission. The highest N₂O emission observed at moderated N level. In total GWP, about 96% and 4%, GHG was emitted as CH₄ and N₂O, respectively. The mean GWP of CH₄ and N₂O emissions from rice was 5758 kg CO₂ eq ha^-1. The least yield-scaled GWP (0.7565 (kg CO₂ eq. ha^-1)) was recorded at 190 kg N ha^-1 that provided the near utmost yield. This dose could be a suitable dose in midseason drainage managed rice systems especially in tropical and subtropical climatic conditions. This yield-scaled GWP supports the concept of win-win for food security and environmental aspects through balancing between viable rice productivity and maintaining convincing greenhouse gases.

Keywords: GHGs; GWP; Methane; Nitrous oxide; Rice; Systematic review; Yield-scaled GWP.

Publication types

Systematic Review

MeSH terms

Agriculture
Global Warming*
Methane
Nitrogen
Nitrous Oxide / analysis
Oryza*
Soil

Substances

Soil
Nitrous Oxide
Nitrogen
Methane