Abstract
Vermicomposts are very important in crop production as they contain biologically active substances such as plant growth regulators. Two experiments were carried out at Wageningen University in 2007 to determine the effectiveness of vermicompost in uptake of nutrients by plants. In the first experiment, seeds of water-cress (Lepidium sativum L.) and lettuce (Lactuca sativa L.) were germinated using different concentrations of Indole Acetic Acid and Gibberellic Acid then, extracts of vermicompost, green waste compost, and course peat with different dilutions. In the second experiment, root initiation in mungbean cuttings was assessed at different concentrations of Indole Acetic Acid and different dilutions of the compost extracts. Increased concentrations of Indole Acetic Acid depressed root growth in watercress and mungbean, whereas increased Gibberellic Acid concentrations promoted shoot growth in lettuce. Compost extracts positively? influenced root and shoot growth in the three plant species especially without any dilution. In lettuce shoot and root length increased with decrease in dilutions of compost extracts; in watercress, root length increased more than shoot length in all dilutions; while root initiation in mungbean increased with increase in dilutions apart from peat extract. Peat extract was most effective on root initiation in mungbean while ermicompost was most effective in both lettuce and watercress root/shoot length formation. Results from this study suggest that vermicompost, green waste compost and peat may contain plant growth regulators. The effects of compost extracts on plant growth and development were attributed to plant growth hormones produced by microbial activity during compost and peat formation.
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Claims 12
Claim · model-written summary
Increased Indole Acetic Acid concentrations depressed root growth in watercress.
- Taxon
- watercress
Nasturtium officinalee1 - Organ / stage
- roote1
- Treatment
- Indole Acetic Acide1
- Outcome
- root growthe1
- Direction
- depressede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Increased concentrations of Indole Acetic Acid depressed root growth in watercress and mungbean”
Claim · model-written summary
Increased Indole Acetic Acid concentrations depressed root growth in mungbean.
- Taxon
- mungbean
.jpg?width=60)
Vigna radiatae1 - Organ / stage
- roote1
- Treatment
- Indole Acetic Acide1
- Outcome
- root growthe1
- Direction
- depressede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“Increased concentrations of Indole Acetic Acid depressed root growth in watercress and mungbean”
Claim · model-written summary
Increased Gibberellic Acid concentrations promoted shoot growth in lettuce.
- Taxon
- lettuce
Lactuca sativae2 - Organ / stage
- shoote2
- Treatment
- Gibberellic Acide2
- Outcome
- shoot growthe2
- Direction
- promotede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“increased Gibberellic Acid concentrations promoted shoot growth in lettuce”
Claim · model-written summary
Compost extracts influenced root and shoot growth in watercress, especially without any dilution.
- Taxon
- water-cressNasturtium officinalee3
- Treatment
- Compost extractse5
- Outcome
- root and shoot growthe5
- Direction
- influencede5
- Qualifier
- especially without any dilutione5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Compost extracts positively? influenced root and shoot growth in the three plant species especially without any dilution”
e3“seeds of water-cress (Lepidium sativum L.) and lettuce (Lactuca sativa L.) were germinated”
Claim · model-written summary
Compost extracts influenced root and shoot growth in lettuce, especially without any dilution.
- Taxon
- lettuceLactuca sativae3
- Treatment
- Compost extractse5
- Outcome
- root and shoot growthe5
- Direction
- influencede5
- Qualifier
- especially without any dilutione5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Compost extracts positively? influenced root and shoot growth in the three plant species especially without any dilution”
e3“seeds of water-cress (Lepidium sativum L.) and lettuce (Lactuca sativa L.) were germinated”
Claim · model-written summary
Compost extracts influenced root and shoot growth in mungbean, especially without any dilution.
- Taxon
- mungbeanVigna radiatae4
- Treatment
- Compost extractse5
- Outcome
- root and shoot growthe5
- Direction
- influencede5
- Qualifier
- especially without any dilutione5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Compost extracts positively? influenced root and shoot growth in the three plant species especially without any dilution”
e4“root initiation in mungbean cuttings was assessed”
Claim · model-written summary
In lettuce, shoot and root length increased as compost extract dilutions decreased.
- Taxon
- lettuceLactuca sativae6
- Treatment
- decrease in dilutions of compost extractse6
- Outcome
- shoot and root lengthe6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“In lettuce shoot and root length increased with decrease in dilutions of compost extracts”
Claim · model-written summary
In watercress, root length increased more than shoot length in all compost extract dilutions.
- Taxon
- watercressNasturtium officinalee7
- Treatment
- all dilutionse7
- Outcome
- root lengthe7
- Direction
- increasede7
- Comparator
- shoot lengthe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“in watercress, root length increased more than shoot length in all dilutions”
Claim · model-written summary
In mungbean, root initiation increased with increasing compost extract dilution, except for peat extract.
- Taxon
- mungbeanVigna radiatae0
- Organ / stage
- roote0
- Treatment
- increase in dilutionse0
- Outcome
- root initiatione0
- Direction
- increasede0
- Qualifier
- apart from peat extracte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while root initiation in mungbean increased with increase in dilutions apart from peat extract”
Claim · model-written summary
Peat extract was the most effective treatment for root initiation in mungbean.
- Taxon
- mungbeanVigna radiatae0
- Organ / stage
- roote0
- Treatment
- Peat extracte0
- Outcome
- root initiatione0
- Direction
- most effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peat extract was most effective on root initiation in mungbean”
Claim · model-written summary
Vermicompost was the most effective treatment for root/shoot length formation in lettuce.
- Taxon
- lettuceLactuca sativae0
- Treatment
- ermicomposte0
- Outcome
- root/shoot length formatione0
- Direction
- most effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ermicompost was most effective in both lettuce and watercress root/shoot length formation”
Claim · model-written summary
Vermicompost was the most effective treatment for root/shoot length formation in watercress.
- Taxon
- watercressNasturtium officinalee0
- Treatment
- ermicomposte0
- Outcome
- root/shoot length formatione0
- Direction
- most effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ermicompost was most effective in both lettuce and watercress root/shoot length formation”
The same questions in other papers
Gibberellic acid · growth · Lactuca sativa (garden lettuce)Results differ
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- no effect
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1 paper in the same direction as this paper
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201 papers in the same direction as this paper · 45 in the opposite direction · 1 reporting no difference from an alternative
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See all 271 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.