Effect of potassium releasing, phosphate solubilizing and nitrogen fixing bacteria on vegetative characteristics and nutrient uptake of tomato plants under field conditions

Articles in Press

Document Type : Research Paper

Authors

1 Postdoctoral Researcher - University of Tabriz

2 Professor, Department of Horticultural, Faculty of Agriculture, University of Tabriz, Iran

3 Professor, Department of Soil Science, University of Tabriz, Tabriz, Iran

10.22034/saps.2025.67818.3375

Abstract

Potassium releasing, phosphate solubilizing and nitrogen fixing bacteria play an important role in the supply of nutrients requirement for plants. In order to evaluate the effect of potassium releasing, phosphate solubilizing and nitrogen fixing bacteria on growth, nutrient uptake and yield of tomato, an experiment has been carried out based on randomized complete block design with 9 treatments and 3 replications.
In this experiment, tomato (Lycopersicon esculentum Mill cv. Super Chief) seeds were inoculated with single and combined treatments of the potassium releasing (KSB: Pseudomonas sp. S19-1, Pseudomonas sp. S14-3) and phosphate solubilizing (PSB: P. putida Tabriz, P. fluorescence Tabriz) and nitrogen fixing bacteria (NFB: Azospirillum sp. Acu9, Azotobacter sp.). Moreover, the control treatment without bacteria inoculation (negative control) and fertilizer treatment according to soil test (positive control) in order to comparison were considered.
The results showed that the application of all three species of bacteria on characters such as yield of plant, shoot dry and fresh weight, leaf area, chlorophyll index, nitrogen, phosphorus and potassium percentage in the leaf was significant and the highest yield was in KSB treatment , the highest leaf area, chlorophyll index and phosphorus was in PSB+KSB treatment, the highest shoot fresh and dry weight and K was in NFB+PSB+KSB treatment and the highest N was in NFB treatment .
According to the results of this study, the potassium-releasing, phosphate-solubilizing, and nitrogen-fixing bacteria can be used as biofertilizers to improve nutrient uptake, leaf area, chlorophyll and yield (by 31/89%) of tomato.

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Journal of Agricultural Science and Sustainable Production

Articles in Press, Accepted Manuscript
Available Online from 20 April 2027

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