Browsing by Author "Ekin, Z."

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Field Evaluation of Rhizobacterial Inoculants in Combination With Humic Substances To Improve Seed and Oil Yields of Safflower (Carthamus Tinctorius L.) Under Irrigated and Rainfed Conditions
(Aloki Applied Ecological Research and Forensic inst Ltd, 2020) Ekin, Z.
The present study was evaluated the application of humic acid (HA), which possess multifaceted biological action, and plant growth promoting rhizobacteria (PGPR) inoculation to improve the morphologic performance, yield and seed quality of safflower under different water regimes in the Eastern Anatolia region of Turkey. In a 2-year field trial, the two humic acid level (200 and 400 kg ha(-1)) and the two rhizobacterial strains (Bacillus megatorium M3 and Bacillus subtilis OSU142) in together with control treatments were evaluated under irrigated and rainfed conditions using randomized complete block design with a split-split plot arrangement. Bacterial strains and humic acid levels highly increased plant growth, seed and oil yields, and seed nutrient contents under irrigated and rainfed conditions. However, the combined application of the OSU142 strain with 400 kg HA hat resulted in the greatest enhancement of safflower growth and yield under irrigated conditions, and seed and oil yields increased by 101.8 and 127.6% with treatment of 400 HA + OSU14 respectively. Moreover, the integrated use of humic acids and PGPR inoculation relatively showed additive effect in the growth and yields of safflower under rainfed conditions, and increased by 186.5 with treatment of 400 HA + OSU142 and 257.1% with treatment of 400 HA + M respectively.
Co-Application of Humic Acid and Bacillus Strains Enhances Seed and Oil Yields by Mediating Nutrient Acquisition of Safflower (Carthamus Tinctorius L.) Plants in a Semi-Arid Region
(Aloki Applied Ecological Research and Forensic inst Ltd, 2020) Ekin, Z.
Faced with the deterioration of natural resources, current trends in agriculture are focused on seeking eco-friendly methods to improve plant growth promotion and crop productivity. Plant growth promoting rhizobacteria (PGPR) and humic substances can improve crop production in sustainable farming due to their various features. This study examined how humic acid (HA) and inoculation with PGPR (Bacillus megatorium and Bacillus subtilis) affect the agronomic performance of safflower (Carthamus tinctorius L.) in a semi-arid environment. In the field experiments, PGPR inoculated and non-inoculated safflower seeds were cultivated in soil treated with humic acid (0, 200, 300, and 400 kg ha(-1)), alone or in combination. It was observed that PGPR and HA improved growth, yield parameters and seed mineral contents. Their plant growth responded positively to inoculation with Bacillus sp. strains owing to the N-fixing and P-solubilizing capabilities, whereas greatly positive response in the seed yield and quality was found when applied in combination with humic acids. The combined application of 300 and 400 kg ha(-1) HA with Bacillus subtilis inoculation enhanced seed and oil yields by an average of 162% and 221% relative to the control plants. This study confirms that integrated management strategies can ensure higher crop productivity of safflower in sustainable and semi-arid environments.