Cotton Response Simulation to Dry and Salinity Stress by using of AquaCrop Model
Abstract:

Currently, agriculture is a crucial support for the national food security as well as economic sustainability. Among all factors, water is the most important and limited production factor. The simulation models of yield response to the water and irrigation water salinity are expected to play an increasingly important role in the optimization of water productivity (WP) in agriculture. AquaCrop model is a powerful and valuable tool for improvement of water management in the field and calculating water productivity. In this study, canopy cover, yield, biomass and evapotranspiration of cotton were simulated by using AquaCrop model under different levels of water salinity and deficit irrigation condition. The treatments included three levels of irrigation water salinity and three levels of irrigation depth. The experiment design was laid out with split-split plot in a factorial design with three replications. Results showed that the model can simulate different parameters with high accuracy (d>0.95). By reducing the amount of irrigation water and increasing of irrigation water salinity, simulation error was increased, but simulation results were in the acceptable range. For low levels of water and salinity stress, there was no very difference in the simulation results. AquaCrop model can be valuable tool in water and salinity management.

Language:
Persian
Published:
Irrigation & Water Engineering, Volume:6 Issue: 21, 2015
Page:
166
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