Journal of Crop Science and Biotechnology

, Volume 22, Issue 3, pp 235–242 | Cite as

Evaluation of Nitrogen Effects on Yield and Drought Tolerance of Rainfed Wheat using Drought Stress Indices

  • Mohammad Hossein Sedri
  • Ata AminiEmail author
  • Ahmad Golchin
Research Article


Soil, available water and nitrogen are limiting factors that restrict the production of wheat in arid lands of Iran. To evaluate the effects of nitrogen on yield and drought tolerance of rainfed wheat by stress susceptibility indices, a two-year field experiment was conducted under two irrigation conditions. Treatments consist of three nitrogen timing, as main plots including total nitrogen in fall, 2/3 in the fall+1/3 in the spring, and 1/2 in the fall+1/2 in the spring. The five nitrogen rates with 0, 30, 60, 90, and 120 kg.ha−1 of urea were applied as sub-plots. The experiments were conducted using randomized complete block designs in a split-plot arrangement with three replications during the 2012–2013 and 2013–2014 cropping seasons. The results showed that yield in stress and non-stress conditions were significantly and positively correlated with most of the drought stress indices (P < 0.01) and negatively correlated with the Stress Susceptibility Index, SSI, (P < 0.05). The Tolerance Index (STI) was the best index for drought tolerance. Results of nitrogen treatment showed that nitrogen increased drought tolerance, while applying 60 kg.ha−1 nitrogen in the fall was with the highest yield in wheat.

Key words

Drought crop stress nitrogen rainfed wheat 


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Copyright information

© Korean Society of Crop Science and Springer 2019

Authors and Affiliations

  • Mohammad Hossein Sedri
    • 1
  • Ata Amini
    • 2
    Email author
  • Ahmad Golchin
    • 3
  1. 1.Soil and Water Research DepartmentKurdistan Agricultural and Natural Resources Research and Education Center, AREEOSanandajIran
  2. 2.Kurdistan Agricultural and Natural Resources Research and Education CenterAREEOSanandajIran
  3. 3.Soil Science Department of Agricultural Faculty of Zanjan UniversityZanjanIran

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