Impact of extreme weather events on coconut productivity in three climatic zones of Sri Lanka

Pathmeswaran, C.; Lokupitiya, Erandathie; Waidyarathne, K. P.; Lokupitiya, R. S.

doi:10.1016/j.eja.2018.03.001

Cited by 20 publications

(15 citation statements)

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“…The floral primordial initiation stage is critical to water stress and has a definite negative impact on the coconut yield. Coconut is more sensitive to water and temperature stress with respect to the number of female flowers/inflorescence and nut setting, and climate variability also has a negative impact on coconut productivity [36]; hence, it is advocated to adopt irrigation for improving nut productivity. The methods of irrigation that are suitable for coconut are basin irrigation; micro-irrigation, such as sprinklers; and drip irrigation.…”

Section: Resultsmentioning

confidence: 99%

FAO CROPWAT Model-Based Irrigation Requirements for Coconut to Improve Crop and Water Productivity in Kerala, India

et al. 2019

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The irrigation requirements for coconut in Kerala are general in nature. This study determined the irrigation requirements for coconut, using CROPWAT based on agro-ecological zones (AEZs) for proposing the recommendations. The irrigation recommendations are generated based on the climatic, soil, and crop characteristics. The results showed that the irrigation requirements varied with the locations. Overall, for the state of Kerala, the irrigation requirements varied from 350 to 900 L of water per coconut palm, with the irrigation intervals ranging from three to nine days based on the AEZs. Moreover, this study also confirmed the variation of the water requirements observed within the districts. The quantity of water required per palm varied between 115 to 200 liters per day (LPD) per palm, which is lower than the existing recommendations of 175 to 300 LPD per palm. The proposed irrigation requirements appraised with the presently followed recommendations of the Kerala state, and its advantages discussed for improving the crop and water productivity. In nutshell, if the current recommendation is adopted, 30% of the water used for irrigation can be saved, as well as leading to an improvement in crop production.

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Section: Resultsmentioning

confidence: 99%

FAO CROPWAT Model-Based Irrigation Requirements for Coconut to Improve Crop and Water Productivity in Kerala, India

et al. 2019

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“…Further, the coconut plantations act as carbon sinks that absorbs atmospheric CO2 which can mitigate climate change (Ranasinghe, 2012). A few studies have attempted to estimate the impacts of extreme events on coconut productivity (Pathmeswaran et al, 2018) but limited to regression analysis between coconut productivity and number of extreme events. However, none has attempted to explore deviations from the optimum growing conditions or thresholds for coconuts.…”

Section: Effects Of Rainfall and Temperature On Coconut Productionmentioning

confidence: 99%

Climate Change and Extreme Events in WL1a Agro-ecological Zone of Sri Lanka: Implications on Coconut Production

et al. 2020

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The temporal variations in rainfall, temperature and the associated extreme events were examined with the objective to ascertain their potential effects on coconut production in Ratnapura district of Sri Lanka. Temporal variations were measured using Mann-Kendal test and extreme events were examined using climate indices related to daily rainfall and daily temperature. Daily rainfall and minimum and maximum temperature data of Ratnapura representing Agro Ecological Region, WL1a obtained from the Department of Meteorology of Sri Lanka for the period of 1961 to 2015, were used for the analysis. The base period was considered as 1961 to 1990 as recommended by the World Meteorological Organization. According to the results of the Mann-Kendall tests, minimum temperature had a positive trend and maximum temperature had a negative trend. Among sector-specific climate indices, Standardized Precipitation Evapotranspiration Index in the long-time scale and minimum temperature showed a significant positive trend and the value of the 95 th percentile of maximum temperature showed a significant negative trend. The other indices related to drought, extreme rainfall, extreme warm days and maximum annual number of consecutive dry days did not show significant trends during the period 1991 to 2015. Despite the latter, the former indicates an occurrence of drought like situations in the future. Adoption of both short and long-term drought control measures in coconut cultivations if they are to be promoted in Agro Ecological Region of WL1a are recommended as prolonged droughts and high temperatures adversely affect production of coconuts.

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“…O The Fifth Assessment Report -AR5 salienta que a ocorrência de eventos extremos tende a se tornar mais frequente durante todo o século XXI (IPCC, 2013;SANCHES;VERDUM;FISCH, 2014). Dessa forma, o clima e a periodicidade de seus eventos meteorológicos extremos despertam cada vez mais interesse na sociedade, pois seu conhecimento contribui para o planejamento, na definição de diretrizes que regulamentam o uso e a ocupação do solo, na construção civil e exploração agropecuária (CONTI, 2005;KESHAVARZ, 2017;KESHAVARZ, 2018;LEE et al, 2018;LUNGARSKA;CHAKIR, 2018;PAILLER;TSANEVA, 2018;PATHMESWARAN et al, 2018;ROCHA;SANT'ANNA NETO, 2010;SANCHES;VERDUM;FISCH, 2014;SOMBOONSUKE et al, 2018).…”

Section: Introductionunclassified

Tendências Espaço-Temporais das Precipitações na Bacia do Rio Ivaí (PR) e a Relação com Alagamentos, Enxurradas e Inundações

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2020

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Os eventos extremos de precipitação causam severos danos no espaço urbano e rural. A bacia hidrográfica do Ivaí abrange uma grande amplitude latitudinal, longitudinal e topográfica, tornando seus estudos complexos e necessários, além de se uma importante área de produção agrícola. Objetivou-se neste trabalho analisar a variabilidade sazonal e a tendência pluviométrica e os seus impactos por meio de ocorrências de alagamento, enxurradas e inundações na mesma. Para a análise da tendência utilizou-se os testes de Correlação Linear (R²), Mann-Kendall Significance (MK Z) e a Monotonic Trend (MC Tau) para as quatro estações do ano. Identificou-se que o verão e o outono são as estações que tiveram as tendências pluviométricas negativas mais acentuadas, principalmente nas regiões sul e leste da bacia. Enquanto as ocorrências de desastres naturais vinculados à precipitação são alarmantes na região, ao todo 127 decretos de situações de emergência foram registrados.

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Impact of extreme weather events on coconut productivity in three climatic zones of Sri Lanka

Cited by 20 publications

References 15 publications

FAO CROPWAT Model-Based Irrigation Requirements for Coconut to Improve Crop and Water Productivity in Kerala, India

FAO CROPWAT Model-Based Irrigation Requirements for Coconut to Improve Crop and Water Productivity in Kerala, India

Climate Change and Extreme Events in WL1a Agro-ecological Zone of Sri Lanka: Implications on Coconut Production

Tendências Espaço-Temporais das Precipitações na Bacia do Rio Ivaí (PR) e a Relação com Alagamentos, Enxurradas e Inundações

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