Iranian Journal of Field Crop Science

Iranian Journal of Field Crop Science

Effects of biological and chemical phosphorous fertilizer on grain yield, oil seed and fatty acids of Spring Safflower in water deficit conditions

Document Type : Research Paper

Authors
Siavash Heshmati 1
Majid Amini Dehaghi 2
Kayvan Fathi Amirkhiz 1
1 Former M.Sc. Student, Department of Agronomy, Faculty of Agriculture, Shahed University, Tehran, Iran
2 Associate Professor, Department of Agronomy, Faculty of Agriculture, Shahed University, Tehran, Iran
10.22059/ijfcs.2017.135975.653977
Abstract
In order to study the effect of biologic and chemical phosphorous fertilizer on the yield and physiological characteristics of a safflower cultivar (IL111) under water deficit conditions, an experiment was conducted in 2012 at the Research Field of the Faculty of Agriculture, Shahed University. The experimental design was split-factorial arrangement in randomized complete block design with three replicates. The main factors tested were the three levels of water stress: full irrigation or non-stress (irrigation up to 50% soil moisture depletion relative to field capacity), water stress during the vegetative and flowering stages (irrigation up to 75% soil moisture depletion relative to field capacity). There were six sub-factor treatments created using three concentrations of phosphate chemical fertilizer (0, 50, and 100 kg ha-1Triple Super Phosphate) and two concentrations of Barvar-2 bio-fertilizer (with and without inoculation with Barvar-2). The results indicated that all traits were significantly affected by water stress condition in this experiment.The use of biological fertilizer and chemical phosphorus fertilizer at a concentration of 50 kg ha-1Triple Super Phosphate during water stress at the flowering stage increased the seed yield and harvest index by 1761.67 kg ha-1 and %12.53, respectively in comparison with control treatment (non-stress). Applying drought conditions during the flowering stage also significantly increased the fatty acid content (oleic, linoleic), oil content and oil yield when the plants were treated with biofertilizer and chemical fertilizer. Therefore, the characteristics of safflower cultivars under water stress conditions can be improved by applying both biological fertilizer and chemical fertilizer.
Keywords
Barvar 2
Drought stress
linoleic acid
oil content
Triple super phosphate
Subjects
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Iranian Journal of Field Crop Science
Volume 48, Issue 1 - Serial Number 1
Spring 2017
Pages 159-169

  • Receive Date 14 November 2015
  • Revise Date 05 February 2016
  • Accept Date 19 April 2016
  • Publish Date 22 May 2017