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 11
Claim · model-written summary
Increased indole acetic acid concentrations depressed root growth in watercress.
- Taxon
- watercress
Nasturtium officinalee1 - Treatment
- Increased concentrations of 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 - Treatment
- Increased concentrations of 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 - Treatment
- increased Gibberellic Acid concentrationse2
- Outcome
- shoot growthe2
- Direction
- promotede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“whereas increased Gibberellic Acid concentrations promoted shoot growth in lettuce”
Claim · model-written summary
Compost extracts positively influenced root and shoot growth in three plant species, especially without dilution.
- Taxon
- three plant speciese3
- Treatment
- Compost extractse3
- Outcome
- root and shoot growthe3
- Direction
- positivelye3
- Qualifier
- especially without any dilutione3
Not reportedComparator
Verbatim
e3“Compost extracts positively? influenced root and shoot growth in the three plant species especially without any dilution”
Claim · model-written summary
In lettuce, shoot and root length increased with decreasing dilution of compost extracts.
- Taxon
- lettuceLactuca sativae4
- Treatment
- dilutions of compost extractse4
- Outcome
- shoot and root lengthe4
- Direction
- increasede4
- Qualifier
- with decrease in dilutionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“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 dilutions.
- Taxon
- watercressNasturtium officinalee5
- Treatment
- all dilutionse5
- Outcome
- root lengthe5
- Direction
- increasede5
- Comparator
- shoot lengthe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“in watercress, root length increased more than shoot length in all dilutions”
Claim · model-written summary
In mungbean, root initiation increased with increasing dilution, apart from peat extract.
- Taxon
- mungbeanVigna radiatae6
- Treatment
- increase in dilutionse6
- Outcome
- root initiatione6
- Direction
- increasede6
- Qualifier
- apart from peat extracte6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“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 radiatae7
- Treatment
- Peat extracte7
- Outcome
- root initiatione7
- Direction
- most effectivee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Peat extract was most effective on root initiation in mungbean”
Claim · model-written summary
Vermicompost extract was the most effective treatment for root and shoot length formation in lettuce.
- Taxon
- lettuceLactuca sativae0
- Treatment
- ermicomposte0
- Outcome
- root/shoot length formatione0
- Direction
- most effectivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while ermicompost was most effective in both lettuce and watercress root/shoot length formation”
Claim · model-written summary
Vermicompost extract was the most effective treatment for root and shoot length formation in watercress.
- Taxon
- watercressNasturtium officinalee0
- Treatment
- ermicomposte0
- Outcome
- root/shoot length formatione0
- Direction
- most effectivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while ermicompost was most effective in both lettuce and watercress root/shoot length formation”
Claim · model-written summary
The effects of compost extracts on plant growth and development were attributed to plant growth hormones produced by microbial activity.
Verbatim
e0“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”
e3“Compost extracts positively? influenced root and shoot growth in the three plant species especially without any dilution”
The same questions in other papers
Gibberellic acid · growth · Lactuca sativa (garden lettuce)Results differ
35 papers in the same direction as this paper · 8 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- no effect
41 papers more in this group
See all 45 papers →indole-3-acetic acid · growth · Vigna radiata (mung bean)Positive and negative results
4 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 papers →indole-3-acetic acid · growth · Nasturtium officinale (watercress)Results agree
1 paper in the same direction as this paper
- negative
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.