Abstract
Peat is the predominant component of growing media in soilless horticultural systems. However, peat extraction from peatlands destroys these fragile ecosystems and emits greenhouse gas emissions (GHG). Peat replacement by other growing media is, thus, paramount to ensure a more sustainable horticultural sector. This study investigated the agronomical performances of two spent coffee ground-based composts with and without biochar, during three different stages of tomato (Solanum lycopersicum L.) development: seeds germination (0–6 days), seedling development (7–49 days), and plant-to-fruit maturity (36–100 days). The two composts were used as peat replacement and mixed with peat at four different volumetric proportions: 100% (pure compost), 50%, 30%, and 15%. The substrates had a stimulant effect on seed germination but induced stunted growth due to the elevated electrical conductivity. For the latest stages of plant development, compost with and without biochar mixed with peat at 50% promoted an increase in fruit production of 60.8% and 100.3%, compared to the control substrate. The present study provides evidence that combining biochar with spent coffee ground compost represents a potential alternative for peat-based growing media promoting a circular production model in the horticultural sector, but the results are dilution- and plant development stage-dependent.
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Claims 3
Claim · model-written summary
Spent coffee ground-based composts with and without biochar, used as peat replacement, had a stimulant effect on tomato seed germination.
- Taxon
- tomato (Solanum lycopersicum L.)
Solanum lycopersicume0 - Treatment
- spent coffee ground-based composts with and without biochare0
- Outcome
- seed germinatione1
- Direction
- stimulant effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spent coffee ground-based composts with and without biochar, during three different stages of tomato (Solanum lycopersicum L.)”
e1“The substrates had a stimulant effect on seed germination”
Claim · model-written summary
The compost substrates induced stunted tomato seedling growth, attributed by the authors to elevated electrical conductivity.
- Taxon
- tomato (Solanum lycopersicum L.)Solanum lycopersicume0
- Treatment
- spent coffee ground-based composts with and without biochare0
- Outcome
- growthe1
- Direction
- stuntede1
- Qualifier
- elevated electrical conductivitye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spent coffee ground-based composts with and without biochar, during three different stages of tomato (Solanum lycopersicum L.)”
e1“induced stunted growth due to the elevated electrical conductivity”
Claim · model-written summary
In later plant development stages, compost with and without biochar mixed with peat at 50% increased tomato fruit production by 60.8% and 100.3% compared with the control substrate.
- Taxon
- tomato (Solanum lycopersicum L.)Solanum lycopersicume0
- Treatment
- compost with and without biochar mixed with peat at 50%e1
- Outcome
- fruit productione1
- Direction
- increasee1
- Value
- 60.8% and 100.3%e1
- Comparator
- control substratee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two spent coffee ground-based composts with and without biochar, during three different stages of tomato (Solanum lycopersicum L.)”
e1“compost with and without biochar mixed with peat at 50% promoted an increase in fruit production of 60.8% and 100.3%, compared to the control substrate”
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