Evaluating the Efficacy of Selected Plant Growth-Promoting Microorganisms in Optimizing Plant Growth and Soil Health in Diverse Soil Types

Sándor Attila Pabar, Zsolt Kotroczó (), Tünde Takács () and Borbála Biró
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Sándor Attila Pabar: Department of Soil Biology, Institute for Soil Sciences, Centre for Agricultural Research, HUN-REN, Herman Ottó Str. 15, H-1022 Budapest, Hungary
Zsolt Kotroczó: Department of Agro-Environmental Studies, Hungarian University of Agriculture and Life Sciences, Villányi Str. 29–43, H-1118 Budapest, Hungary
Tünde Takács: Department of Soil Biology, Institute for Soil Sciences, Centre for Agricultural Research, HUN-REN, Herman Ottó Str. 15, H-1022 Budapest, Hungary
Borbála Biró: Department of Agro-Environmental Studies, Hungarian University of Agriculture and Life Sciences, Villányi Str. 29–43, H-1118 Budapest, Hungary

Agriculture, 2024, vol. 14, issue 9, 1-17

Abstract: This study explores the efficacy of bio-efficient solutions, specifically plant growth-promoting microorganisms (PGPMs), in sustainable soil management. This research was conducted in 2020. It evaluates the impact of various single microbial inoculants, including Enterobacter ludwigii , Bacillus subtilis , Pseudomonas fluorescens , Kosakonia cowanii , and Trichoderma harzianum , on plant growth soil enzyme activity and organism abundance. Perennial ryegrass and mustard were used as test plants, in controlled environmental conditions. The results show generally positive effects of microbial inoculants on plant biomass ( E. ludwigii increased ryegrass biomass by 9.75%, and P. fluorescens increased mustard biomass by up to 38.81% compared to the control) and on soil microbial activities. Our study further investigated the combined application of all these strains in five different soil types and textures. The results highlight the significance of soil physicochemical properties in determining inoculant efficacy; we found that clayey soils with higher colloid content support more robust microbial activity. Additionally, using natural clay minerals like alginite for enhancing soil conditions showed promising interactions with microbial inoculants, although application requires further optimization. These findings suggest that integrating microbial inoculants in sustainable agricultural practices could enhance plant growth, improve soil health, and reduce the need of chemical fertilizers. Future research should aim to refine the combinations and application methods of these bio-efficient solutions for broader agricultural applicability.

Keywords: plant growth-promoting microorganisms (PGPMs); microbial inoculants; sustainable soil management; alginite; soil enzyme activity (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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