Soil amendments and cultivar selection can improve rice yield in salt-influenced (tsunami-affected) paddy fields in Sri Lanka |
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Authors: | Thomas G Reichenauer Sunil Panamulla Siripala Subasinghe Bernhard Wimmer |
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Institution: | (1) Department of Health and Environment, Environmental Resources and Technologies, Austrian Research Centers GmbH – ARC, 2444 Seibersdorf, Austria;(2) Department of Crop Science, University of Ruhuna, Kamburupitiya, 81100, Sri Lanka |
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Abstract: | The tsunami disaster in the Indian Ocean in December 2004 caused devastation of agricultural soils by salt water over wide
areas. Many rice fields located close to the coast were affected by the flood of seawater. Electric conductivity (EC) of soils
in tsunami-affected rice fields was found to be higher compared to unaffected fields 2 years after the tsunami. Four soil
amendments (gypsum, dolomite, cinnamon ash and rice-husk-charcoal) were tested for their influence on improving the yield
parameters of rice grown in a tsunami-affected and a non-affected area. Yield parameters were compared with an untreated control
of the same cultivar (AT362) and with a salt resistant rice variety (AT354). The salt resistant variety had the highest grain
yield. The two amendments gypsum and rice-husk-charcoal led to an increase in grain yield compared to the untreated control,
whereas dolomite and cinnamon ash had no significant effect on grain yield. |
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Keywords: | Rice Salt stress Soil amendment Tsunami Yield |
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