Impacts of climate change on paddy yields in different climatic zones of Sri Lanka: a panel data approach

Chandrasiri, Chamila Kumari; Tsusaka, Takuji W.; Ho, Tien D. N.; Zulfiqar, Farhad; Datta, Avishek

doi:10.1007/s41685-022-00264-5

Cited by 7 publications

(4 citation statements)

References 58 publications

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“…According to Chandrasiri et al . (2022), paddy yields under various water regimes and in different climatic zones in Sri Lanka were affected by climate variables specific to each growth phase of paddy. Weerakoon et al .…”

Section: Methodsmentioning

confidence: 99%

“…For example, extreme temperature reduces leaf canopy, final leaves, and photosynthetic efficiency during the vegetative stage (Yoshida, 1981;Wassmann et al, 2009), and causes floret abortion, pollen sterility (Punyawardena, 2007;Dharmarathna et al, 2014), and grain sterility during the reproductive stage (Jagadish et al, 2007;Sridevi & Chellamuthu, 2015;Gumel et al, 2017). According to Chandrasiri et al (2022), paddy yields under various water regimes and in different climatic zones in Sri Lanka were affected by climate variables specific to each growth phase of paddy. Weerakoon et al (2017) found that the stage most sensitive to elevated atmospheric temperature was the reproductive phase, especially at the time of anthesis.…”

Section: Datamentioning

confidence: 99%

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Impact of climate change on paddy crop failure under different water regimes in Sri Lanka

Chandrasiri

Tsusaka

Zulfiqar

et al. 2023

Singap J Trop Geogr

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This study highlighted the severity of paddy harvest failure under various water regimes by elaborating on spatiotemporal variations, and estimating the influence of climatic variation on such crop failure in Sri Lanka. A panel data set obtained from 18 districts from 1981 to 2019 was analysed. The Unharvest Index (UI) (i.e., an index that was developed to measure the intensity of crop failure) was estimated according to seasonal water regimes for each district. The panel data regression method was used for analysis. On average, 5 per cent of areas planted for paddy was unharvested annually, fluctuating with the coefficient of variation at 60 per cent with remarkable spatial variation. Harvest failure was more prominent in rainfed production as compared to irrigated cultivation; in dry and intermediate zones as opposed to wet zones; and in the Maha season (October to March) rather than the Yala season (April to September). Climate variability during the crop season significantly altered UI, especially during the early growth phase (Growth Phase I) as compared to the later growth phase (Growth Phase II). Temperature variability increased UI in rainfed production; an increase in the number of days above optimum temperature in Growth Phase I affected UI in minor irrigation; higher rainfall during Growth Phase I reduced UI in rainfed production; and higher rainfall variation reduced UI under all water regimes. Our findings suggest the importance of formulating localized climate‐smart adaptation policies and specific crop insurance programs for rainfed paddy production.

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Section: Methodsmentioning

confidence: 99%

Section: Datamentioning

confidence: 99%

Impact of climate change on paddy crop failure under different water regimes in Sri Lanka

Chandrasiri

Tsusaka

Zulfiqar

et al. 2023

Singap J Trop Geogr

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“…There are two main cropping seasons in Sri Lanka. Yala is the minor agricultural season, which runs from April to September, while Maha is the major cultivation season, which runs from October to March [1]. In Trincomalee district, paddy cultivation takes place during both the Maha and Yala seasons.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Impacts of Fertilizer Crisis on Paddy Cultivation in Five Selected Divisional Secretariat Divisions of Trincomalee District During Maha 2021/22

Abirami,

Sutharsan,

Srikrishnah

et al. 2024

Asian Res. J. Agric.

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Rice is one of the most important cereal crops in the world. With population growth, farmers have to increase paddy production to meet existing as well as future demand. Fertilizer is the major input in rice production. Growth and yield traits of rice are affected by improper and imbalanced application of plant nutrients. Hence, suitable practices of adequate rate and timing of fertilizer application are needed to increase the rice yield. In May 2021, Imports & Exports (Control) Regulation No 07 of 2021 was issued, banning the importation of chemical fertilizers, pesticides, & herbicides in Sri Lanka. Low fertility of paddy soil created the need for adequate and constant supply of chemical fertilizers in paddy cultivation, which is a major threat to production and endangers the national food security and economy of Sri Lanka, especially in the major cropping season of Maha 2021/22. Therefore, a questionnaire survey was conducted to investigate the impact of the fertilizer crisis in major paddy-cultivating Divisional Secretariat divisions of the Trincomalee district. The random sampling method was used to select respondents for the survey, and the collected data were statistically analyzed by SPSS version 26.0 software. The results revealed that the majority of the farmers experienced a 50% yield reduction compared to the last cropping season of Maha 2020/21 in the entire five DS divisions. The seedling stage was highly affected during the fertilizer crisis in paddy cultivation in all five DS divisions. Further, the cost of production in paddy cultivation increased by more than 50% during the fertilizer crisis compared to the cost involved in Maha 2020/21. The potential for organic manure production is very poor, while the majority of farmers are interested in adopting the sustainable farming system of the Integrated Plant Nutrient System through the judicious application of chemical and organic fertilizers received on a subsidy basis, according to the present government’s fertilizer policy, which emphasizes 70% of inorganic fertilizers and 30% of organic manure application to improve sustainability in paddy cultivation in the country.

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“…Heat stresses on crops and livestock reduce productivity, while floods and droughts cause yield losses (Farhad et al; Wang et al). In particular, climate change hotspots are frequently reported in India, Sri Lanka, Bangladesh, China, and Vietnam in association with paddy-and wheat-based production systems (Ho et al, 2022;Chandrasiri et al, 2023). In this light, farming communities and associated stakeholders have been exploring strategies to adapt to climate change, with the overarching goal of maintaining the yield of food crops (Gorst et al, 2018;Abegunde et al, 2019).…”

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confidence: 99%

Editorial: Adaptation strategies to climate change impacts on food systems in Asia: greater efforts toward achieving the Sustainable Development Goals

Tsusaka,

Kristiansen,

et al. 2023

Front. Sustain. Food Syst.

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Impacts of climate change on paddy yields in different climatic zones of Sri Lanka: a panel data approach

Cited by 7 publications

References 58 publications

Impact of climate change on paddy crop failure under different water regimes in Sri Lanka

Impact of climate change on paddy crop failure under different water regimes in Sri Lanka

A Study on the Impacts of Fertilizer Crisis on Paddy Cultivation in Five Selected Divisional Secretariat Divisions of Trincomalee District During Maha 2021/22

Editorial: Adaptation strategies to climate change impacts on food systems in Asia: greater efforts toward achieving the Sustainable Development Goals

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