2023 Volume 14 Issue 2 Pages 20-26
Climate change poses a challenge to irrigation water supply, especially in the case of the continuous flood irrigation method (CF). Alternate wetting and drying irrigation (AWD) is a method of rice cultivation widely used as a mitigation measure for water consumption, without reducing yields. To better promote AWD in areas where water scarcity occurs in the future, it is necessary to quantify the impact of AWD on growth. The objective of this study was to evaluate the impact of AWD on rice growth under AWD irrigation using logistic curves. Subsequent analysis demonstrated that by using AWD, irrigation capacity was reduced by approximately 19 %. Additionally, multiple regression analysis indicated that temperature, sunshine hours, and relative humidity had significant effects on plant growth. A growth model (RMSE = 2.98 cm to 3.82 cm) was generated by applying a logistic curve where the daily mean integrated values of meteorological data as explanatory variables and plant growth as the objective variable. Using the model, it was found that AWD increased the growth rate of the rice plant; however, rice plant growth in the initial period was lower compared to CF.
