Abstract
Biochar can provide multiple benefits in the ecosystem. However, an important concern, which needs to be addressed, is the presence of phytotoxic compounds in some biochars. In this work seed germination and plant development are reported for three biochars prepared from wood, paper sludge plus wheat husks and sewage sludge on five higher plant species (cress, lentil, cucumber, tomato and lettuce). In general, seed germination was not affected except for the inhibition caused by wood biochar in several species and the inhibition induced by paper sludge biochar on lettuce. No inhibition of root growth was detected, but in some cases leaf and stem growth were inhibited. The results are significant in terms of advancing current understanding on the impacts of biochar on vegetative growth and linking those effects to biochar inherent properties.
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Claims 5
Claim · model-written summary
Seed germination was generally unaffected by the biochars.
- Taxon
- cress, lentil, cucumber, tomato and lettucee1
- Treatment
- biochare0
- Outcome
- seed germinatione0
- Direction
- not affectede0
Not reportedComparator
Verbatim
e0“In general, seed germination was not affected except for the inhibition caused by wood biochar in several species and the inhibition induced by paper sludge biochar on lettuce”
e1“cress, lentil, cucumber, tomato and lettuce”
Claim · model-written summary
Wood biochar inhibited seed germination in several species.
- Taxon
- cress, lentil, cucumber, tomato and lettucee2
- Treatment
- wood biochare0
- Outcome
- seed germinatione1
- Direction
- inhibitione0
- Qualifier
- several speciese0
Not reportedComparator
Verbatim
e0“inhibition caused by wood biochar in several species”
e1“In general, seed germination was not affected”
e2“cress, lentil, cucumber, tomato and lettuce”
Claim · model-written summary
Paper sludge biochar inhibited lettuce seed germination.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- paper sludge biochare0
- Outcome
- seed germinatione1
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inhibition induced by paper sludge biochar on lettuce”
e1“In general, seed germination was not affected”
Claim · model-written summary
No root growth inhibition was detected under the biochar treatments.
- Taxon
- cress, lentil, cucumber, tomato and lettucee1
- Treatment
- three biocharse1
- Outcome
- root growthe0
- Direction
- No inhibitione0
Not reportedComparator
Verbatim
e0“No inhibition of root growth was detected”
e1“three biochars prepared from wood, paper sludge plus wheat husks and sewage sludge on five higher plant species (cress, lentil, cucumber, tomato and lettuce)”
Claim · model-written summary
Leaf and stem growth were inhibited in some cases.
- Taxon
- cress, lentil, cucumber, tomato and lettucee1
- Treatment
- three biocharse1
- Outcome
- leaf and stem growthe0
- Direction
- inhibitede0
- Qualifier
- in some casese0
Not reportedComparator
Verbatim
e0“in some cases leaf and stem growth were inhibited”
e1“three biochars prepared from wood, paper sludge plus wheat husks and sewage sludge on five higher plant species (cress, lentil, cucumber, tomato and lettuce)”
The same questions in other papers
biochar · growth · Lactuca sativa (garden lettuce)Results differ
10 papers in the same direction as this paper · 41 in the opposite direction
- positive
- negative
- no effect
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See all 52 papers →organic · growth · Lactuca sativa (garden lettuce)Positive and negative results
4 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
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See all 17 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.