Abstract
The excessive use of agrochemicals has caused significant negative environmental impacts, highlighting the growing need for more sustainable alternatives. Among these, aqueous composts extracts enable less harmful intensive agricultural practices. The objective of this study was to explore methods for stabilizing the biofertilizing microbiota of compost extracts and to evaluate their effects on drought and oxidative stress. For this, an aqueous extract was prepared from agri-food waste compost by suspending it in water at a 1:5 ratio and incubating the mixture for 14 days at room temperature. The physicochemical properties of the extract were analyzed. In addition, microorganisms associated with the biofertilizing capacity of the extract, which was formulated with various compounds were monitored over the course of one month storage at different temperatures. The bioformulations showing better biofertilizing potential were selected for testing on cucumber seedlings to evaluate their capability for promoting plant growth and alleviating oxidative stress. Additionally, a drought stress test was conducted on grass to evaluate the effect of applying the extract. The results of the physicochemical characterization and bacterial abundance showed a good nutritional composition and a rich microbiota with biofertilizing activity. In terms of microorganism counts under storage conditions, the most stable formulations were those formed by the extract supplemented with 2 % glycerol, as well as the extract without supplement (as extracted). Cucumber seedlings treated with the more stable extracts exhibited enhanced agronomic traits, particularly improved root development, and reduced oxidative stress. The root-promoting effect was also observed in the drought stress test, where grass seedlings subjected to 30 % soil moisture and treated with a combination of the extract with chemical fertilizer presented greater root development (around 5.50 g cm −3 ) compared to treatments lacking the extracts (around 2–3.30 g cm −3 ). These results suggest that aqueous compost extracts provide drought resistance and increased root development, offering a promising alternative to conventional mineral fertilization. • The compost tea presented bacterial families related to biofertilizing capacity. • The extract and its formulation with glycerol produced less oxidative stress. • The application of compost tea promoted greater root development. • Nutrient solution with compost tea protects roots from drought stress.
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Claims 6
Claim · model-written summary
In the extract physicochemical and bacterial analysis, the compost extract showed a good nutritional composition and a rich microbiota with biofertilizing activity.
Verbatim
e1“The results of the physicochemical characterization and bacterial abundance showed a good nutritional composition and a rich microbiota with biofertilizing activity”
Claim · model-written summary
In terms of microorganism counts under storage, the most stable formulations were the extract supplemented with 2 % glycerol and the extract without supplement.
Verbatim
e1“the most stable formulations were those formed by the extract supplemented with 2 % glycerol, as well as the extract without supplement”
Claim · model-written summary
Cucumber seedlings treated with the more stable compost extracts showed enhanced agronomic traits.
- Taxon
- Cucumber seedlings
Cucumis sativuse1 - Treatment
- the more stable extractse1
- Outcome
- agronomic traitse1
- Direction
- enhancede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Cucumber seedlings treated with the more stable extracts exhibited enhanced agronomic traits, particularly improved root development, and reduced oxidative stress”
Claim · model-written summary
Cucumber seedlings treated with the more stable compost extracts showed improved root development.
- Taxon
- Cucumber seedlingsCucumis sativuse1
- Treatment
- the more stable extractse1
- Outcome
- root developmente1
- Direction
- improvede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Cucumber seedlings treated with the more stable extracts exhibited enhanced agronomic traits, particularly improved root development, and reduced oxidative stress”
Claim · model-written summary
Cucumber seedlings treated with the more stable compost extracts showed reduced oxidative stress.
- Taxon
- Cucumber seedlingsCucumis sativuse1
- Treatment
- the more stable extractse1
- Outcome
- oxidative stresse1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Cucumber seedlings treated with the more stable extracts exhibited enhanced agronomic traits, particularly improved root development, and reduced oxidative stress”
Claim · model-written summary
Grass seedlings at 30 % soil moisture treated with the extract plus chemical fertilizer had greater root development (around 5.50 g cm-3) than treatments lacking the extracts (around 2-3.30 g cm-3).
Verbatim
e1“grass seedlings subjected to 30 % soil moisture and treated with a combination of the extract with chemical fertilizer presented greater root development (around 5.50 g cm −3 ) compared to treatments lacking the extracts (around 2–3.30 g cm −3 )”
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