Investigating the Effect of IrrigationmManagement on Promoting Maize WatermProductivity Considering Climate Change

Kalanaki, Mahdi (2015) Investigating the Effect of IrrigationmManagement on Promoting Maize WatermProductivity Considering Climate Change. Masters thesis, University of Zabol.

Investigating the Effect of Irrigation.pdf

Download (191kB) | Preview


In this research, the integrated effects of long-term variation in climate variables and irrigation performance were managed on maize yield and water productivity was investigated in Mazandaran province. After calibrating and validating LARS-WG for simulating climatic variables in Noshahr, Ramsar, Gharakheil and Babolsar stations during the base period (i.e. 1981-2010); the model was applied for downscaling climate variable of HADCM3 model and A1B, A2 and B1 scenarios during for the periods of 2011-2040, 2041-2070 and 2071-2100. Thereafter, DSSAT model was calibrated and validated using the two-yearcollected-data in the research field of Sari agriculture and Natural Resource University under three treatments of full irrigation and deficit irrigation at two levels of 55 and 75%. Based on RMSE (9.54-14.7 mm for precipitation, 0.159- 0.179 °c for Tmin and 0.11-0.33 °c for Tmax) and EF (more than 91, 99 and 97 percent for precipitation, Tmin and Tmax, respectively), LARS-WG was capable enough for simulating the climatic variables and no significant difference was observed between observed and simulated precipitation and temperature based on t-test analysis 5% significance level. Also, DSSAT model was capable enough for simulating growth parameter and crop water use for different treatments. a delay in maize cultivation would increase the crop water use by 0.23%-73.3 % with the maximum one for DI75 treatment under B1 scenario in 2071-2100 Period. Early cultivation results in changing maize yield by -25.1 to 35.03%. Overall, applying deficit irrigation at 55 and 75% level under climate change will change water productivity by -40.7 to 55.9% delay or early cultivation will intensify the negative effects of climate change.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Water use efficiency, Maize, DSSAT, Mazandaran, Deficit irrigation
Subjects: S Agriculture > S Agriculture (General)
Depositing User: admin admin1 admin2
Date Deposited: 22 Jun 2016 08:36
Last Modified: 22 Jun 2016 08:36

Actions (login required)

View Item View Item