Effects of Different Water Levels on Physiology and Yield of Salinity Rice Variety

Md. Sarwar, Jahan and Mohd Khairi, Che Lah and Mohd Nozulaidi, Nordin (2015) Effects of Different Water Levels on Physiology and Yield of Salinity Rice Variety. Australian Journal of Basic and Applied Sciences, 9 (2). pp. 339-345. ISSN 1991-8178

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Abstract

Background: Water wise rice production is the current concern. Objective: To justify the water effects on production of salinity rice cultivar, plants physiological, and yield parameters were evaluated. There were four water treatments, T1: flooding at 5 cm (control), T2: flooding at 1 cm, T3: saturated condition and T4: alternative wet and dry (AWD) and five replicates were arranged according to a completely randomized design. Yield, plant and soil parameters under different irrigation conditions were measured. Results: Different water treatments affected plant height at secondary tillering stage, yield and yield parameters of rice plants. AWD treatment decreased chlorophyll (Chl) content and Chl fluorescence in leaves. In addition, net photosynthesis rate (Pn), relative water content (RWC) decreased gradually with decreasing water content in the soil. AWD treatment reduced soil pH but increased soil electric conductivity (EC) value. Conclusion: These results suggest that AWD affected plant yield through modulating plant physiological function but saturated to 1 cm flooding condition showed no effect on rice yield and plant physiology.

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