Bringing farmers’ perceptions into science and policy: Understanding salinity tolerance of rice in southwestern Bangladesh under climate change

Article

Islam, Aminul, Shelia, Vakhtang, Ludwig, Fulco, de Bruyn, Lisa Lobry, Rahman, M. Habib ur and Hoogenboom, Gerrit. 2021. "Bringing farmers’ perceptions into science and policy: Understanding salinity tolerance of rice in southwestern Bangladesh under climate change." Land Use Policy: the international journal covering all aspects of land use. 101. https://doi.org/10.1016/j.landusepol.2020.105159

Article Title	Bringing farmers’ perceptions into science and policy: Understanding salinity tolerance of rice in southwestern Bangladesh under climate change
ERA Journal ID	21007
Article Category	Article
Authors	Islam, Aminul, Shelia, Vakhtang, Ludwig, Fulco, de Bruyn, Lisa Lobry, Rahman, M. Habib ur and Hoogenboom, Gerrit
Journal Title	Land Use Policy: the international journal covering all aspects of land use
Journal Citation	101
Article Number	105159
Number of Pages	9
Year	2021
Publisher	Elsevier
Place of Publication	United Kingdom
ISSN	0264-8377
	1873-5754
Digital Object Identifier (DOI)	https://doi.org/10.1016/j.landusepol.2020.105159
Web Address (URL)	https://www.sciencedirect.com/science/article/pii/S0301479721004758
Abstract	Salinization is a major global issue due to its adverse impact on agricultural productivity and sustainability. A substantial part of the coastal region of Bangladesh is affected by different magnitudes of salinity. Therefore, maintaining sustainable agricultural production is a major emphasis for policymakers. The objective of this study was to assess the salinity tolerance threshold for Boro season rice cultivation in the southwestern coastal areas of Bangladesh based on farmers’ perceptions of salinity problem. We applied an adaptation tipping point (ATP) approach that signifies the points, e.g., timeframe, when the threshold of a system is reached and alternate strategies must be considered for management planning. The primary data were collected through household surveys and focus group discussions, and were then interpreted and harmonized with literature reviews and expert opinions. The results revealed that farmers perceived the panicle emergence stage of rice as the most vulnerable to salinity and that a high salt concentration in the soil during this growth stage results in a lower yield. In southwestern Bangladesh, panicle emergence of rice during the Boro season is usually observed from March to April, the same period when salinity reaches its peak level. Based on farmers’ perspectives of salinity problems and literature, this study defined the salinity tolerance threshold between 4–5 dS/m for traditional Boro season rice varieties and between 8–10 dS/m for newly released salt-tolerant rice varieties. We conclude that for the traditional Boro season rice varieties the tipping points might already have been reached in some coastal areas of southwestern Bangladesh, while for newly released salt-tolerant rice varieties these tipping points could be reached in the near future.
Keywords	Vulnerable growth stage Panicle emergence Salt intrusion Salinity tolerance threshold
ANZSRC Field of Research 2020	300202. Agricultural land management
	419999. Other environmental sciences not elsewhere classified
Public Notes	Copies of this publication cannot be made publicly accessible, but can be accessed from the publisher URL on the record
Byline Affiliations	University of New England
	Wageningen University, Netherlands
	Washington State University, United States
	University of Florida, United States
	University of Bonn, Germany
	Muhammad Nawaz Shareef University of Agriculture, Pakistan

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