Rainfall Pattern Changes in Non-Traditional Rubber Growing Areas in Sri Lanka

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dc.contributor.authorWanasinghe, W.M.S.T.
dc.date.accessioned2021-10-27T09:18:58Z
dc.date.available2021-10-27T09:18:58Z
dc.date.issued2015
dc.description.abstractRubber cultivation was extended to non-traditional areas of Intermediate and Dry Zones to increase the rubber production in Sri Lanka. The most crucial climatic factor in rubber cultivation is rainfall and agricultural operations are closely linked with rainfall. It is extremely important to study the changes in the rainfall pattern in these areas continuously. This study aims to find the changes in rainfall pattern in selected 11 weather stations, which represent non-traditional rubber growing areas. Daily rainfall data of these stations from 1983 to 2017 were collected from Meteorological Department. Rainfall anomalies were analyzed using Standardized Precipitation Index (SPI) for 1 month, 2 months, 3 months, 5 months and 12 months timescales and Mann Kendall test was performed to identify trends in SPI time series. It was observed significant positive trends in 3 months SPI values in Anuradhapura, Wellawaya in Northeast monsoon and in Muthuiyankaddu Kulam during Second inter-monsoon periods, which are recommended seasons for rubber planting in non- traditional areas. Vavuniya has shown a positive trend in 1 month SPI values in March which is recommended for fertilizer application. Whereas, negative trends were observed in 1 month SPI values in Anuradhapura, Badulla and Muthuiyankaddu Kulam in May, October and July, respectively. Therefore, it can be concluded that the probability of having sufficient rainfall during planting and fertilizing seasons is high in Anuradhapura, Wellawaya, Muthuiyankaddu Kulam and Vavuniya and it is favourable for non-traditional locations of rubber. As Badulla showed a negative trend in rubber planting season, there is a risk of drought occurrence which needs to be among concerns of rubber plantations in Badulla. Key-words: Non-traditional rubber growing areas, Rainfall, Standardized Precipitation Index, Trend Analysisen_US
dc.identifier.otherUWU/PLT/15/0046
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/7439/PLT%2015%20046-13082021120419.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.relation.ispartofseries;UWU/PLT/15/0046
dc.subjectPalm and Latex Technology and Value Addition Degree Programme ( PLT)en_US
dc.titleRainfall Pattern Changes in Non-Traditional Rubber Growing Areas in Sri Lankaen_US
dc.title.alternativeResearch Article – PLT 2015en_US
dc.typeThesisen_US
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