The impact of rainfall fluctuation on days and rubber productivity in Songkhla Province

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Published: Jan 16, 2015
Keywords:
Climate variability Dry rubber yield Rainfall Rainy days Tapping day

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Ruangsri, K.
Department of Plant Science, Faculty of Natural Resources, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
Makkaew, K.
Department of Plant Science, Faculty of Natural Resources, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
Sdoodee, S.
Department of Plant Science, Faculty of Natural Resources, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand

Abstract

Recent evidence has revealed anomalous fluctuations of climate in the southern Thailand, particularly in the Songkhla province where is one of the major rubber plantation areas. Therefore, the effects of climate variations on rubber productivity were investigated. The study was conducted in the 4 rubber plantation sites all situated in Hat Yai district, Songkhla province where rubber clone RRIM600 was grown. Rainfall and evaporation data measured at the station in Hat Yai district during 1982-2013 were analyzed. The results showed that the annual rainfall totals increased significantly at the rate of 22.51 mm/year. Likewise, the annual number of rainy days has a significant increasing trend of 0.77 days/ year. During May 2008-March 2012, annual rainfall total and the annual number of rainy days tended to be higher. Particularly in 2011, there was exceptionally high rainfall amounts occurred during summer period leading to twice leaf-defoliations. This climate fluctuation also caused a delay of tapping. During April 2009-March 2012, the accumulated dry rubber yield per year tended to decrease, whereas annual rainfall totals and the annual number of rainy days increased. This may indicate that increasing rainfall amounts with higher rainy days cause a decrease in tapping days per year resulting in the reduction of rubber productivity. However after 2012 rainfall tended to decrease with decreasing of rainy day. Rubber smallholder also adapted to tap with high frequency to increase then increase under the crisis of low rubber price.

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How to Cite
Ruangsri, K., Makkaew, K., & Sdoodee, S. (2015). The impact of rainfall fluctuation on days and rubber productivity in Songkhla Province. International Journal of Agricultural Technology, 11(1), 181–191. retrieved from https://li04.tci-thaijo.org/index.php/IJAT/article/view/6012
Issue
Vol. 11 No. 1 (2015): January
Section
Original Study
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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