The Impact of Sewage-Sludge- and Olive-Mill-Waste-Derived Biochar Amendments to Tomato Cultivation

This study elucidated the impact of sewage-sludge (SS) and olive-mill-waste (OMW) biochar amendments to soil using tomatoes as a test crop. Four treatments were evaluated: the “control” with no biochar amendment, two SS biochar treatments with the addition of 10 t/ha and 25 t/ha, respectively, and a...

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Bibliographic Details
Published in:Sustainability 2023-03, Vol.15 (5), p.3879
Main Authors: Lilli, Maria A, Paranychianakis, Nikolaos V, Lionoudakis, Konstantinos, Kritikaki, Anna, Voutsadaki, Styliani, Saru, Maria L, Komnitsas, Konstantinos, Nikolaidis, Nikolaos P
Format: Article
Language:English
Subjects:
Agricultural ecology
Agricultural ecosystems
Agricultural production
Agriculture
Biodiversity
By-products
Carbon content
Charcoal
Corn
Cultivation
Environmental aspects
Experiments
Fertilizers
Fruit cultivation
Heavy metals
Industrial wastes
Land application
Microbial activity
Microbiota
Microbiota (Symbiotic organisms)
Microorganisms
Nutrients
Olive oil
Physiological aspects
Plant growth
Porous materials
Productivity
Raw materials
Rhizosphere
Sewage
Sludge
Soil amendment
Soil fertility
Soil structure
Soils
Sustainability
Taxa
Tomatoes
Venn diagrams
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Summary:This study elucidated the impact of sewage-sludge (SS) and olive-mill-waste (OMW) biochar amendments to soil using tomatoes as a test crop. Four treatments were evaluated: the “control” with no biochar amendment, two SS biochar treatments with the addition of 10 t/ha and 25 t/ha, respectively, and an OMW biochar treatment with the addition of 25 t/ha. Higher yields were observed in both SS biochar treatments, providing evidence that biochar acts as a plant bio-stimulant. Biochar application had positive impacts on carbon sequestration and soil structure. The uptake of heavy metals by all plant parts was very low, indicating that biochar is an appropriate product for land application. Biochar dose and type induced changes in the composition due to the different unique species and biodiversity of microbial communities. Venn diagrams revealed that the majority of the identified taxa were shared among the treatments, and only a small proportion of them were unique in bulk soil between treatments. In the rhizosphere, the OMW-biochar-treated plants showed a higher number of unique taxa. Microbiota structure plays a major role in the stimulation of plant growth; however, further research is needed to understand the impact of these shifts in the functioning of agroecosystems.
ISSN:2071-1050
2071-1050
DOI:10.3390/su15053879