Soil water content simulation under different irrigation and nitrogen strategies using AquaCrop model
Journal Title: Journal of Research in Ecology - Year 2017, Vol 5, Issue 2
Abstract
The purpose of this research was to study the efficiency and accuracy of AquaCrop model, in estimating soil moisture and soybean crop water consumption based on Evapotranspiration (ET). A field sprinkler irrigation system was conducted under full and deficit irrigation using different nitrogen fertilizer applications (40%, 80%, and 100%) during two cropping seasons for soybean at Gorgan province in Iran. The simulation results showed a reasonably accurate prediction of soil moisture content and actual crop Evapotranspiration (ETc) under different irrigation water application and nitrogen treatments. The Root Mean Square Error (RMSE) of ETc estimation for calibration and validation sets were 14.5 mm and 23.2 mm, respectively. Based on optimization, the required amount of irrigation water to achieve optimum WUE was equal to 200 mm and 275 mm for the first and second year of study, respectively. The simulated soil moisture data can be used in subsequent studies to develop a drought indicator for agricultural drought monitoring
Authors and Affiliations
Sayyed Mohammad Javad Mirzaei, Mojtaba Khoshravesh, Ali-Reza Kiani, Reza Norooz Valashedi
Keywords
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