Climate Change, Salinization and High-Yield Rice Production in Coastal Bangladesh

Dasgupta, Susmita; Hossain, Md. Moqbul; Huq, Mainul; Wheeler, David

doi:10.1017/age.2017.14

Cited by 67 publications

(33 citation statements)

References 38 publications

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“…Salinity level below 4.0 dS/m are generally not stressful for most of the plants, and beyond this level, the yield gets significantly lower as found by Dasgupta et al. (2014 , 2018) . Our study showed that the newly accreted land of the Noakhali district is much higher than that tolerance range of salinity for most crops.…”

Section: Discussionmentioning

confidence: 70%

Assessment of soil salinity in the accreted and non-accreted land and its implication on the agricultural aspects of the Noakhali coastal region, Bangladesh

Das

Rahman

Sufian

et al. 2020

Heliyon

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Soil salinity is a global problem that has adverse effects on both agriculture and aquaculture production. The main objectives of this study were to observe the distribution pattern of soil salinity in the accreted and non-accreted land of the Noakhali district and to determine the intensity of salinity at different depths (1–2 cm, 15–20 cm, and 45–60 cm). Soil samples from 60 sampling sites were analyzed to measure electrical conductivity (EC). The two-way factorial ANOVA model revealed a significant effect of depth (p < 0.001) and sampling locations (p < 0.001) on soil salinity. After decomposition of this model, one-way ANOVA showed that 45–60 cm of depth contains significantly higher soil salinity (p < 0.01) ranging from 0.28 to 4.70 dS/m compared to 1–2 cm (ranging from 0.14 to 2.39 dS/m) and 15–20 cm (ranging from 0.18 to 2.37 dS/m) depth. In the case of accreted lands, surface (1–2 cm) and mid-layer (15–20 cm) soils were found slight to severely saline, while soil at a depth of 45–60 cm was found high to extremely saline. In all cases, salinity increases from the north to southwards and surface to downwards. Our results showed that the accreted land of the Noakhali district contains higher soil salinity compared to the non-accreted land, and soil salinity is positively correlated with depth. Assessment of suitable species and pattern of traditional cropping practices in the study area show conformity with our salinity profile. The study will help stakeholders associated with agricultural development and management in planning and designing the future land use and cropping practices.

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Section: Discussionmentioning

confidence: 70%

Assessment of soil salinity in the accreted and non-accreted land and its implication on the agricultural aspects of the Noakhali coastal region, Bangladesh

Das

Rahman

Sufian

et al. 2020

Heliyon

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“…According to the Food and Agriculture Organization of the United Nations, more than 400 million hectares of land on the major continents are affected by salt [3]. Rising salinization may reduce agricultural acreage by up to 20% per year by 2050 [4]. The amount of land in India that has been degraded by excess sodicity and salinity is estimated to be about 6.75 million hectares [5].…”

Section: Introductionmentioning

confidence: 99%

De novo transcriptome sequencing and analysis of salt-, alkali-, and drought-responsive genes in Sophora alopecuroides

et al. 2020

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Background: Salinity, alkalinity, and drought stress are the main abiotic stress factors affecting plant growth and development. Sophora alopecuroides L., a perennial leguminous herb in the genus Sophora, is a highly salt-tolerant sand-fixing pioneer species distributed mostly in Western Asia and northwestern China. Few studies have assessed responses to abiotic stress in S. alopecuroides. The transcriptome of the genes that confer stress-tolerance in this species has not previously been sequenced. Our objective was to sequence and analyze this transcriptome. Results: Twelve cDNA libraries were constructed in triplicate from mRNA obtained from Sophora alopecuroides for the control and salt, alkali, and drought treatments. Using de novo assembly, 902,812 assembled unigenes were generated, with an average length of 294 bp. Based on similarity searches, 545,615 (60.43%) had at least one significant match in the Nr, Nt, Pfam, KOG/COG, Swiss-Prot, and GO databases. In addition, 1673 differentially expressed genes (DEGs) were obtained from the salt treatment, 8142 from the alkali treatment, and 17,479 from the drought treatment. A total of 11,936 transcription factor genes from 82 transcription factor families were functionally annotated under salt, alkali, and drought stress, these include MYB, bZIP, NAC and WRKY family members. DEGs were involved in the hormone signal transduction pathway, biosynthesis of secondary metabolites and antioxidant enzymes; this suggests that these pathways or processes may be involved in tolerance towards salt, alkali, and drought stress in S. alopecuroides. Conclusion: Our study first reported transcriptome reference sequence data in Sophora alopecuroides, a non-model plant without a reference genome. We determined digital expression profile and discovered a broad survey of unigenes associated with salt, alkali, and drought stress which provide genomic resources available for Sophora alopecuroides.

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“…In the context of Bangladesh, some studies have been conducted to explore the patterns and determinants of livelihood strategies of riverine households (Alam et al, 2017; Brouwer et al, 2007). In addition, similar studies have also been carried out covering on fishing communities alone by the works of Paul and Vogl (2013), Ahmed (2008), Hossain et al, (2018), Deb and Haque (2016) and Islam et al (2011). However, a study on investigating the options and determinants of LD strategies of smallholder farmers especially in southwestern part is not covered by most of these studies.…”

Section: Introductionmentioning

confidence: 99%

Determinants of Livelihood Diversification Under Environmental Change in Coastal Community of Bangladesh

Roy

Basu

2020

Asia-Pacific Journal of Rural Development

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The life and livelihood of coastal farming communities in Bangladesh are highly vulnerable to climate and environmental change. Diversification of farmers’ income sources beyond agriculture can be an effective way to cope with the adverse impacts of environmental change. The purpose of this study is to analyse the options and determinants of livelihood diversification (LD) strategies adopted by farmers in the coastal region of Bangladesh. Multiple linear regression technique along with Simpson index, Herfindahl index and priority index have been used for the analysis. Simple random sampling and multistage sampling have been used to select the sample and the study area, respectively. The magnitude of farming household diversification is at medium level. A significant share of annual income comes primarily from fish and rice production, domestic bird rearing and working as agricultural labour. The adoption of diversified activities is strongly influenced by age and education of household head, number of earning family members, social network and government donation. The frequent occurrence of natural disasters, inadequate infrastructure and lack of financial capacity are the critical constraints to LD.

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Climate Change, Salinization and High-Yield Rice Production in Coastal Bangladesh

Cited by 67 publications

References 38 publications

Assessment of soil salinity in the accreted and non-accreted land and its implication on the agricultural aspects of the Noakhali coastal region, Bangladesh

Assessment of soil salinity in the accreted and non-accreted land and its implication on the agricultural aspects of the Noakhali coastal region, Bangladesh

De novo transcriptome sequencing and analysis of salt-, alkali-, and drought-responsive genes in Sophora alopecuroides

Determinants of Livelihood Diversification Under Environmental Change in Coastal Community of Bangladesh

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