Assessment of rice yield gap under a changing climate in India

Climate change evokes future food security concerns and needs for sustainable intensification of agriculture. The explicit knowledge about crop yield gap at country level may help in identifying management strategies for sustainable agricultural production to meet future food demand. In this study,...

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Autores principales:	Subhankar Debnath, Ashok Mishra, D. R. Mailapalli, N. S. Raghuwanshi, V. Sridhar
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	climate change dssat india rice yield gap Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/205ccde79a1543e1a996a0fecc6309c5
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spelling	oai:doaj.org-article:205ccde79a1543e1a996a0fecc6309c52021-11-05T18:52:33ZAssessment of rice yield gap under a changing climate in India2040-22442408-935410.2166/wcc.2020.086https://doaj.org/article/205ccde79a1543e1a996a0fecc6309c52021-06-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/4/1245https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354Climate change evokes future food security concerns and needs for sustainable intensification of agriculture. The explicit knowledge about crop yield gap at country level may help in identifying management strategies for sustainable agricultural production to meet future food demand. In this study, we assessed the rice yield gap under projected climate change scenario in India at 0.25° × 0.25° spatial resolution by using the Decision Support System for Agrotechnology Transfer (DSSAT) model. The simulated spatial yield results show that mean actual yield under rainfed conditions (Ya) will reduce from 2.13 t/ha in historical period 1981–2005 to 1.67 t/ha during the 2030s (2016–2040) and 2040s (2026–2050), respectively, under the RCP 8.5 scenario. On the other hand, mean rainfed yield gap shows no change (≈1.49 t/ha) in the future. Temporal analysis of yield indicates that Ya is expected to decrease in the considerably large portion of the study area (30–60%) under expected future climate conditions. As a result, yield gap is expected to either stagnate or increase in 50.6 and 48.7% of the study area during the two future periods, respectively. The research outcome indicates the need for identifying plausible best management strategies to reduce the yield gap under expected future climate conditions for sustainable rice production in India. HIGHLIGHTS The study assessed rice yield gap in India by using the DSSAT model.; Equidistant quantile mapping technique is used for bias correction of RCM outputs.; Rice yield is expected to decrease in 30–60% of the study area in future.; Mean rainfed yield gap of 1.49 t/ha is expected in future.; The RegCM4 model performed well to simulate rice yield than other models.;Subhankar DebnathAshok MishraD. R. MailapalliN. S. RaghuwanshiV. SridharIWA Publishingarticleclimate changedssatindiariceyield gapEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 4, Pp 1245-1267 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	climate change dssat india rice yield gap Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	climate change dssat india rice yield gap Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Subhankar Debnath Ashok Mishra D. R. Mailapalli N. S. Raghuwanshi V. Sridhar Assessment of rice yield gap under a changing climate in India
description	Climate change evokes future food security concerns and needs for sustainable intensification of agriculture. The explicit knowledge about crop yield gap at country level may help in identifying management strategies for sustainable agricultural production to meet future food demand. In this study, we assessed the rice yield gap under projected climate change scenario in India at 0.25° × 0.25° spatial resolution by using the Decision Support System for Agrotechnology Transfer (DSSAT) model. The simulated spatial yield results show that mean actual yield under rainfed conditions (Ya) will reduce from 2.13 t/ha in historical period 1981–2005 to 1.67 t/ha during the 2030s (2016–2040) and 2040s (2026–2050), respectively, under the RCP 8.5 scenario. On the other hand, mean rainfed yield gap shows no change (≈1.49 t/ha) in the future. Temporal analysis of yield indicates that Ya is expected to decrease in the considerably large portion of the study area (30–60%) under expected future climate conditions. As a result, yield gap is expected to either stagnate or increase in 50.6 and 48.7% of the study area during the two future periods, respectively. The research outcome indicates the need for identifying plausible best management strategies to reduce the yield gap under expected future climate conditions for sustainable rice production in India. HIGHLIGHTS The study assessed rice yield gap in India by using the DSSAT model.; Equidistant quantile mapping technique is used for bias correction of RCM outputs.; Rice yield is expected to decrease in 30–60% of the study area in future.; Mean rainfed yield gap of 1.49 t/ha is expected in future.; The RegCM4 model performed well to simulate rice yield than other models.;
format	article
author	Subhankar Debnath Ashok Mishra D. R. Mailapalli N. S. Raghuwanshi V. Sridhar
author_facet	Subhankar Debnath Ashok Mishra D. R. Mailapalli N. S. Raghuwanshi V. Sridhar
author_sort	Subhankar Debnath
title	Assessment of rice yield gap under a changing climate in India
title_short	Assessment of rice yield gap under a changing climate in India
title_full	Assessment of rice yield gap under a changing climate in India
title_fullStr	Assessment of rice yield gap under a changing climate in India
title_full_unstemmed	Assessment of rice yield gap under a changing climate in India
title_sort	assessment of rice yield gap under a changing climate in india
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/205ccde79a1543e1a996a0fecc6309c5
work_keys_str_mv	AT subhankardebnath assessmentofriceyieldgapunderachangingclimateinindia AT ashokmishra assessmentofriceyieldgapunderachangingclimateinindia AT drmailapalli assessmentofriceyieldgapunderachangingclimateinindia AT nsraghuwanshi assessmentofriceyieldgapunderachangingclimateinindia AT vsridhar assessmentofriceyieldgapunderachangingclimateinindia
_version_	1718444087497981952

Assessment of rice yield gap under a changing climate in India

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