نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی تولید و ژنتیک گیاهی، دانشکده علوم و فناوری کشاورزی، دانشگاه محقق اردبیلی، اردبیل، ایران
2 عضو هیات علمی گروه اکوفیزیولوژی گیاهی، دانشکده کشاورزی، دانشگاه تبریز، تبریز، ایران
3 گروه علوم و مهندسی خاک، دانشکده علوم و فناوری کشاورزی، دانشگاه محقق اردبیلی، اردبیل، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Objectives: In recent years, the combined application of biochar and plant growth-promoting bacteria has gained attention as a sustainable approach to improving the quality of saline soils and enhancing nutrient use efficiency.
Materials and Methods: A greenhouse pot experiment at Mohaghegh Ardabili University evaluated plain and acid-modified biochar (phosphoric, nitric), with/without Pseudomonas putida inoculation, using a randomized complete block design. Treatments’ effects on saline soil chemical properties and barley (Hordeum vulgare L.) growth and physiology were assessed in a factorial arrangement with three replications.
Results: The highest values for pH, ECe, and soluble sodium were observed in the control treatment (without biochar), while biochar application significantly reduced these indicators by approximately 6%, 11.5%, and 31%, respectively. Biochar modification with H₃PO₄ provided the highest available phosphorus, while HNO₃ modification yielded the highest exchangeable potassium. Application of phosphoric acid–modified biochar increased leaf greenness index by about 27.5% and soluble sugar content by approximately 2.7 times compared with the control, while polyphenol oxidase activity decreased. The highest leaf proline (33 µmol g⁻¹ fresh weight) was observed in bacterial-inoculated pristine biochar. Inoculation with Pseudomonas putida improved the available soil phosphorus by approximately 26.6% compared to the control.
Conclusion: The findings highlight the positive effects of acid-modified biochar and bacterial inoculation in reducing the negative impacts of salinity and enhancing nutrient uptake by barley. These results can serve as a basis for developing sustainable soil management strategies for salt-affected soils.
کلیدواژهها [English]
)