Evaluation of water footprint of Phitsanulok-2 rice yield under alternate wetting and drying cultivation in dry season
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Abstract
The objective of this research was to assess the Water Footprint (WF) of rice cultivation in Phitsanulok Province, Thailand. In this research, the data were collected by the field research technique in order to access WF in the rice fields for water saving without affecting the yield using Phitsanulok-2 rice. The implementation of two water management strategies under Alternate Wetting and Drying Method (AWD) was tested in comparison with Continuous Flooding Method (CF). The experiment was conducted during the dry season in 2016 and 2017 in the irrigated fields of Irrigation Water Management Experiment Station (Phitsanulok). From the results, it was found that the water delivery to the plots with both AWD techniques used less water than the continuous water supply method at approximately 33.64% in 2016 and about 18.26% in 2017 in the dry seasons and maintaining grain yield. The average WF of AWD1, AWD2 and CF was 883.35 m3/ton, 912.90 m3/ton and 1,150.45 m3/ton of paddy, respectively. Therefore, the less water cultivation by AWD1 and AWD2 are the appropriate water management strategy for cultivation of irrigated rice and it is an effective way to reduce WF of water used in the agricultural sector for Thailand.
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