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Volume 12
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10.3390/agronomy12112620
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Article

An Organic Fertilizer ‘Doped’ with a Bacillus Strain Improves Melon and Pepper Yield, Modifying the Rhizosphere Microbiome with Negligible Changes in the Bulk Soil Microbiome

by
Noemí Ortiz-Liébana
1,
Maurizio Zotti
2,
Marcia Barquero
1 and
Fernando González-Andrés
1,*
1
Research Group IQUIMAB, Institute of Environment, Natural Resources and Biodiversity, University of León, 24009 León, Spain
2
Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy
*
Author to whom correspondence should be addressed.
Agronomy 2022, 12(11), 2620; https://doi.org/10.3390/agronomy12112620
Submission received: 18 July 2022 / Revised: 29 September 2022 / Accepted: 12 October 2022 / Published: 25 October 2022
(This article belongs to the Topic Biostimulants in Agriculture)
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Abstract

Doped compost consists of compost inoculated with Bacillus siamensis SCFB3-1 that is formulated in biochar and then mixed with the compost. The study objective was to analyze, at field scale, the effect of doped compost on the melon and pepper yield and on the soil microbiome, hypothesizing that the synergy between the components of doped compost confers additional benefits to the crop. Two doses of compost (2 and 5 t/ha) and two doses of the inoculant (biochar+SCFB3-1) with respect to the compost (3% and 6% w:w) were tested. The highest yield was observed for a reduced dose of mineral fertilization (NPK -20%) with a compost dose of 2 t/ha with 6% of the inoculant. Specifically, the yield increase compared with the control, which only received NPK, was a 47% increase in melon and 28% in pepper. The microbiome of the bulk soil was not modified by the doped compost, but the composition of the rhizosphere microbiome changed, increasing in the abundance of Bacillus (the inoculated strain), but also changing the relative abundance of other genera in the bacterial community. Future works will be focused on unravelling the possible effects of phytohormones on the observed results.
Keywords: Bacillus siamensis; biochar; compost; microbial biostimulants; soil microbiome Bacillus siamensis; biochar; compost; microbial biostimulants; soil microbiome

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MDPI and ACS Style

Ortiz-Liébana, N.; Zotti, M.; Barquero, M.; González-Andrés, F. An Organic Fertilizer ‘Doped’ with a Bacillus Strain Improves Melon and Pepper Yield, Modifying the Rhizosphere Microbiome with Negligible Changes in the Bulk Soil Microbiome. Agronomy 2022, 12, 2620. https://doi.org/10.3390/agronomy12112620

AMA Style

Ortiz-Liébana N, Zotti M, Barquero M, González-Andrés F. An Organic Fertilizer ‘Doped’ with a Bacillus Strain Improves Melon and Pepper Yield, Modifying the Rhizosphere Microbiome with Negligible Changes in the Bulk Soil Microbiome. Agronomy. 2022; 12(11):2620. https://doi.org/10.3390/agronomy12112620

Chicago/Turabian Style

Ortiz-Liébana, Noemí, Maurizio Zotti, Marcia Barquero, and Fernando González-Andrés. 2022. "An Organic Fertilizer ‘Doped’ with a Bacillus Strain Improves Melon and Pepper Yield, Modifying the Rhizosphere Microbiome with Negligible Changes in the Bulk Soil Microbiome" Agronomy 12, no. 11: 2620. https://doi.org/10.3390/agronomy12112620

APA Style

Ortiz-Liébana, N., Zotti, M., Barquero, M., & González-Andrés, F. (2022). An Organic Fertilizer ‘Doped’ with a Bacillus Strain Improves Melon and Pepper Yield, Modifying the Rhizosphere Microbiome with Negligible Changes in the Bulk Soil Microbiome. Agronomy, 12(11), 2620. https://doi.org/10.3390/agronomy12112620

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