Modification of a maize simulation model under different water, nitrogen and salinity levels

Authors

  • A. Azizian Irrigation Department, Shiraz University, Shiraz, I.R. of Iran
  • Sh. Zand-Parsa Irrigation Department, Shiraz University, Shiraz, I.R. of Iran
Abstract:

Irrigation, salinity and nitrogen (N) are the three major limiting environmental factors inmaize yield potentials especially in arid and semi-arid regions. An integrated water and N MaizeSimulation Model (MSM) was modified for salinity conditions using 2009-2010 fieldexperiments data in southwest of Iran. Irrigation levels were: I1=1.0ETc+0.25ETc as normalleaching amount, I2=0.75I1 and I3=0.5I1, salinity of irrigation water: S1=0.6, S2=2.0 and S3=4.0dS m-1 and N fertilizer rate: N1=0, N2=150 and N3=300 kg N ha-1. Data of the first and secondyear were used to calibrate and validate the modified model, respectively. The MSM model wasmodified by including the combined effects of water and salt stresses using different wateruptake functions. Furthermore, N uptake via mass flow process was also modified. By thismodification, the soil salinity was also estimated by the model. Calibration/validation resultsshowed that the water uptake function of Homaee and Feddes led to a better estimation of allparameters than those obtained by other water uptake functions. Based on the NRMSE and dindices, the modified MSM model presented a very good to fair estimation of soil water content,salinity and N, evaporation, transpiration, evapotranspiration, leaf area index, total dray matter,N uptake and grain yield. Besides, under saline irrigation water there was much higher risk tothe groundwater contamination by nitrate leaching.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Maize response to different water, salinity and nitrogen levels: agronomic behavior

Soil water, salinity and nitrogen content are three major factors affecting crop production in arid and semi-arid areas. This study was performed in two years of 2009 and 2010 in a semi-arid area in order to investigate the effects of irrigation water quantity (as main plot), quality (saline water, as sub-plot), nitrogen fertilizer (as sub-sub plot) and their interactions on growth and yiel...

full text

Maize response to water, salinity and nitrogen levels: physiological growth parameters and gas exchange

A split-split-plot design with three replications in two years of 2009 and 2010 was conducted to investigate the effect of different levels of irrigation water (main plot), salinity of irrigation water (sub-plot) and nitrogen fertilizer rate (sub-subplot) on maize growth rate and gas exchange. Irrigation treatments were I1 (1.0 crop evapotranspiration (ETc)+0.25ETc as leaching), I2 (0.75I1)...

full text

Maize response to water, salinity and nitrogen levels: soil and plant ions accumulation

In the present study, some nutritional imbalances, specific ion toxicity and yield-ion concentration relationships in maize under water, nitrogen (N) and salinity stresses were assessed. Effect of different levels of irrigation water (I1=1.0ETc+0.25ETc as leaching, I2 =0.75I1 and I3 =0.5I1) as main plot, salinity of irrigation water (S1=0.6, S2= 2.0 and S3=4.0 dS m-1) as sub-plot and N fertiliz...

full text

Maize response to water, salinity and nitrogen levels: yield-water relation, water-use efficiency and water uptake reduction function

Water, salinity and nitrogen are the major factors affecting maize production in arid and semi-arid areas. The objectives of this study were to investigate the effects of different water, salinity and nitrogen levels on yield-water relationships, water use, water productivity (WP), water use efficiency (WUE) and water uptake reduction function by maize hybrid SC-704 in a semi-arid area and ...

full text

Modification of the saffron model for growth and yield prediction under different irrigation water salinity, manure application and planting methods

The Saffron Yield Estimation Model (SYEM) was modified for salinity conditions, cowmanure application and planting methods using two-year experiments data in Badjgah region ofIran. A split-split plot arrangement was conducted in complete randomized block design duringtwo years with irrigation water salinity levels (0.45 (fresh water, S1), 1.0 (S2), 2.0 (S3) and 3.0(S4) dS m-1) as the main plot,...

full text

Physiological and Ionic Expressions of Different Hybrids of Maize (Zea Mays L.) under Different Salinity Levels

A pot culture experiment was conducted to estimate the behavior of maize under saline soil conditions in the wire house of Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad. There were three treatments with different levels of salinity and equal amount of Ammonium Nitrate (NH4NO3) in all pots including control was applied to three genotypes of Hybrid Maize i.e. ...

full text

My Resources

Save resource for easier access later

Save to my library Already added to my library

{@ msg_add @}


Journal title

volume 9  issue 4

pages  609- 632

publication date 2015-10-01

By following a journal you will be notified via email when a new issue of this journal is published.

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023