Salinity-affected threshold yield loss: A signal of adaptation tipping points for salinity management of dry season rice cultivation in the coastal areas of Bangladesh

Article

Islam, Md Aminul, de Bruyn, Lisa Lobry, Warwick, Nigel W.M. and Koech, Richard. 2021. "Salinity-affected threshold yield loss: A signal of adaptation tipping points for salinity management of dry season rice cultivation in the coastal areas of Bangladesh." Journal of Environmental Management. 288. https://doi.org/10.1016/j.jenvman.2021.112413
Article Title

Salinity-affected threshold yield loss: A signal of adaptation tipping points for salinity management of dry season rice cultivation in the coastal areas of Bangladesh

ERA Journal ID5850
Article CategoryArticle
AuthorsIslam, Md Aminul, de Bruyn, Lisa Lobry, Warwick, Nigel W.M. and Koech, Richard
Journal TitleJournal of Environmental Management
Journal Citation288
Article Number112413
Number of Pages14
Year2021
PublisherElsevier
Place of PublicationNetherlands
ISSN0301-4797
1093-0191
1095-8630
Digital Object Identifier (DOI)https://doi.org/10.1016/j.jenvman.2021.112413
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0301479721004758
Abstract

The potential existence of threshold yield loss in dry season rice growing systems under coastal saline environment remains unexplored, a scenario that could have policy relevance in government planning of rice
intensification in the coastal areas of Bangladesh. This study applied the adaptation tipping points (ATPs)
approach to investigate threshold yield loss from multiple perspectives of farmers affected by salinity. Data were
generated from 280 randomly-selected farmers (rice farmers, n = 109; shrimp farmers, n = 107; salt farmers, n =
64) from two coastal sub-districts using a semi-structured survey. Key informant interviews and focus group
discussions were conducted to complement the survey results. Our study revealed that despite government actions to promote dry season rice cultivation, farmers have been growing less rice in this season, with salinityaffected yield loss being the prime reason. Most of the rice farmers have considered that they would discontinue rice cultivation in this season due to yield loss, while shrimp and salt farmers have already reduced rice
cultivation for the same reason and shifted to shrimp and salt farming as they perceived these enterprises as
highly profitable and require less labour than rice farming. Rice farmers would tolerate a greater rice yield loss
(23%) under saline conditions compared with the shrimp (16%) and salt farmers (14%). The yield loss thresholds
indicate the need for government actions to support and encourage integrated land management for rice, shrimp
and salt farming, rather than research and extension efforts for dry season rice expansion alone. These actions
could strengthen sustainable livelihood options to ensure food security, and contribute to the achievement of
sustainable development goals, for instance no poverty (SDG-1), zero hunger (SDG-2), and good health and wellbeing (SDG-3).

KeywordsSalinity Dry season rice Uncertainty Tipping points Threshold yield loss Coastal areas
ANZSRC Field of Research 2020410103. Human impacts of climate change and human adaptation
3002. Agriculture, land and farm management
30. Agricultural, Veterinary and Food Sciences
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Byline AffiliationsUniversity of New England
Ministry of Agriculture, Bangladesh
Central Queensland University
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