Abstract
Pot soil was supplemented with varying concentration of chitin or chitosan to investigate their influence on the nodulation, nitorgen fixation and growth of soybean plants. Significant (P=0.05) reductions in nodule fresh weight and nitrogen fixaton (measured as acetylene-reduction activity) were observed at the early growth stage (28 DAP) for plants grown in soil supplemented with chitin or chitosan as compared to regular pot soil. However, the nodule numbers were not affected at the early growth stage with the exception of 1% of chitin or chitosan. Both nodulation and nitorgen fixation activity at a later growth stage (42 DAP) were markedly enhanced in soils supplemented with 0.10% of either chitin or chitosan. These results suggest that all concentrations of chitin or chitosan have a severe influence on nodule development and N2-fixation activity at the early growth stage in soybean plants. The production of total dry matter was higher in untreated control plants at 28 DAP, while plants treated with 0.10∼0.25% chitin or chitosan produced higher dry matter at 42 DAP. Soybean seed yield increased with the increasing pod number at these levels of treatment. However, the above parameters did not differ greatly between chitin and chitosan at corresponding levels of concentration.
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Claims 8
Claim · model-written summary
Chitin supplementation significantly reduced early nodule fresh weight and nitrogen fixation relative to regular pot soil.
- Taxon
- soybean plants
Glycine maxe1 - Treatment
- chitine0
- Outcome
- nodule fresh weight and nitrogen fixatone0
- Direction
- reductionse0
- Qualifier
- 28 DAPe0
- Comparator
- regular pot soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant (P=0.05) reductions in nodule fresh weight and nitrogen fixaton (measured as acetylene-reduction activity) were observed at the early growth stage (28 DAP) for plants grown in soil supplemented with chitin or chitosan as compared to regular pot soil”
e1“growth of soybean plants”
Claim · model-written summary
Chitosan supplementation significantly reduced early nodule fresh weight and nitrogen fixation relative to regular pot soil.
- Taxon
- soybean plantsGlycine maxe1
- Treatment
- chitosane0
- Outcome
- nodule fresh weight and nitrogen fixatone0
- Direction
- reductionse0
- Qualifier
- 28 DAPe0
- Comparator
- regular pot soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant (P=0.05) reductions in nodule fresh weight and nitrogen fixaton (measured as acetylene-reduction activity) were observed at the early growth stage (28 DAP) for plants grown in soil supplemented with chitin or chitosan as compared to regular pot soil”
e1“growth of soybean plants”
Claim · model-written summary
Early nodule numbers were unchanged except at 1% chitin or chitosan.
- Taxon
- soybean plantsGlycine maxe1
- Outcome
- nodule numberse0
- Direction
- not affectede0
- Qualifier
- with the exception of 1% of chitin or chitosane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the nodule numbers were not affected at the early growth stage with the exception of 1% of chitin or chitosan”
e1“growth of soybean plants”
Claim · model-written summary
At 42 DAP, 0.10% chitin enhanced nodulation and nitrogen fixation.
- Taxon
- soybean plantsGlycine maxe1
- Treatment
- 0.10% of either chitin or chitosane0
- Outcome
- nodulation and nitorgen fixation activitye0
- Direction
- enhancede0
- Qualifier
- 42 DAPe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both nodulation and nitorgen fixation activity at a later growth stage (42 DAP) were markedly enhanced in soils supplemented with 0.10% of either chitin or chitosan”
e1“growth of soybean plants”
Claim · model-written summary
Control plants had higher total dry matter at 28 DAP.
- Taxon
- soybean plantsGlycine maxe1
- Outcome
- total dry mattere0
- Direction
- highere0
- Comparator
- untreated control plantse0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of total dry matter was higher in untreated control plants at 28 DAP”
e1“growth of soybean plants”
Claim · model-written summary
Plants treated with 0.10∼0.25% chitin or chitosan had higher dry matter at 42 DAP.
- Taxon
- soybean plantsGlycine maxe1
- Treatment
- 0.10∼0.25% chitin or chitosane0
- Outcome
- dry mattere0
- Direction
- highere0
- Qualifier
- 42 DAPe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants treated with 0.10∼0.25% chitin or chitosan produced higher dry matter at 42 DAP”
e1“growth of soybean plants”
Claim · model-written summary
Soybean seed yield rose with increasing pod number at these treatment levels.
- Taxon
- SoybeanGlycine maxe0
- Organ / stage
- pode0
- Outcome
- seed yielde0
- Direction
- increasede0
- Qualifier
- at these levels of treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean seed yield increased with the increasing pod number at these levels of treatment”
Claim · model-written summary
Measured parameters differed little between chitin and chitosan at corresponding concentrations.
- Taxon
- soybean plantsGlycine maxe1
- Outcome
- above parameterse0
- Direction
- did not differ greatlye0
- Comparator
- chitin and chitosane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the above parameters did not differ greatly between chitin and chitosan at corresponding levels of concentration”
e1“growth of soybean plants”
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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.