Abstract
Laboratory, greenhouse, and field studies were conducted to determine the allelopathic potential of lantana and Siam weed on the germination and growth of five crops. Emergence and dry weight of bioassay species were affected when lantana or Siam weed debris was present on the soil surface or incorporated into the soil. However, presence of Siam weed on the soil surface did not affect dry weight of rape. Emergence and dry weight of crops (except emergence of spinach) were not affected when crops were grown in soil samples collected from beneath field-grown lantana. Dry weight of Chinese cabbage and chilli was reduced when these crops were grown in Siam weed-contaminated soil. Germination of Chinese cabbage, chilli, and rape decreased progressively when exposed to increasing concentrations of aqueous lantana extract. However, the lantana extract at full strength (66.7 g L −1 ) did not reduce germination of spinach and cucumber seed. Siam weed extract, when applied at full strength to seed of spinach, Chinese cabbage, rape, and chilli, reduced germination by 10, 12, 21, and 19% of control, respectively. Full-strength extract of lantana and Siam weed decreased seedling length and fresh weight of all crops.
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Claims 11
Claim · model-written summary
Emergence and dry weight of bioassay species were affected when lantana or Siam weed debris was present on or in the soil.
- Taxon
- cropst0
- Treatment
- lantana or Siam weed debrise1
- Second interactor
- Siam weede1weed
- Outcome
- Emergence and dry weight of bioassay speciese1
LantanaNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Selected Crops”
e1“Emergence and dry weight of bioassay species were affected when lantana or Siam weed debris was present on the soil surface or incorporated into the soil”
Claim · model-written summary
Dry weight of rape was not affected by Siam weed on the soil surface.
- Taxon
- rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse2 - Treatment
- presence of Siam weed on the soil surfacee2
- Interactor
- Siam weede2weed
- Outcome
- dry weighte2
- Direction
- did not affecte2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
t0“Selected Crops”
e2“presence of Siam weed on the soil surface did not affect dry weight of rape”
Claim · model-written summary
Emergence and dry weight of crops, except spinach emergence, were not affected by soil from beneath field-grown lantana.
- Taxon
- cropst0
- Treatment
- soil samples collected from beneath field-grown lantanae3
- Outcome
- Emergence and dry weight of cropse3
- Direction
- not affectede3
- Qualifier
- except emergence of spinache3
- Setting
- fielde3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Selected Crops”
e3“Emergence and dry weight of crops (except emergence of spinach) were not affected when crops were grown in soil samples collected from beneath field-grown lantana”
Claim · model-written summary
Dry weight of Chinese cabbage and chilli was reduced when grown in Siam weed-contaminated soil.
- Taxon
- Chinese cabbage and chillie4
- Treatment
- Siam weed-contaminated soile4
- Interactor
- Siam weede4weed
- Outcome
- Dry weighte4
- Direction
- reducede4
Not reportedComparator
Verbatim
e4“Dry weight of Chinese cabbage and chilli was reduced when these crops were grown in Siam weed-contaminated soil”
Claim · model-written summary
Germination of Chinese cabbage, chilli and rape decreased progressively with increasing concentrations of aqueous lantana extract.
- Taxon
- Chinese cabbage, chilli, and rapee5
- Treatment
- increasing concentrations of aqueous lantana extracte5
- Outcome
- Germinatione5
- Direction
- decreasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Germination of Chinese cabbage, chilli, and rape decreased progressively when exposed to increasing concentrations of aqueous lantana extract”
Claim · model-written summary
Full-strength lantana extract did not reduce germination of spinach and cucumber seed.
- Taxon
- spinach and cucumber
Spinacia oleracea
Cucumis sativuse7 - Treatment
- lantana extract at full strengthe6
- Outcome
- germinatione7
- Direction
- did not reducee7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“the lantana extract at full strength”
e7“did not reduce germination of spinach and cucumber seed”
Claim · model-written summary
Siam weed extract at full strength reduced spinach germination by 10% of control.
- Taxon
- spinachSpinacia oleraceae0
- Treatment
- Siam weed extract, when applied at full strengthe0
- Interactor
- Siam weede0weed
- Outcome
- germinatione0
- Direction
- reducede0
- Value
- 10e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Siam weed extract, when applied at full strength to seed of spinach, Chinese cabbage, rape, and chilli, reduced germination by 10, 12, 21, and 19% of control, respectively”
Claim · model-written summary
Siam weed extract at full strength reduced Chinese cabbage germination by 12% of control.
- Taxon
- Chinese cabbage
Brassica rapa subsp. pekinensise0 - Treatment
- Siam weed extract, when applied at full strengthe0
- Interactor
- Siam weede0weed
- Outcome
- germinatione0
- Direction
- reducede0
- Value
- 12e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Siam weed extract, when applied at full strength to seed of spinach, Chinese cabbage, rape, and chilli, reduced germination by 10, 12, 21, and 19% of control, respectively”
Claim · model-written summary
Siam weed extract at full strength reduced rape germination by 21% of control.
- Taxon
- rapeBrassica napuse0
- Treatment
- Siam weed extract, when applied at full strengthe0
- Interactor
- Siam weede0weed
- Outcome
- germinatione0
- Direction
- reducede0
- Value
- 21e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Siam weed extract, when applied at full strength to seed of spinach, Chinese cabbage, rape, and chilli, reduced germination by 10, 12, 21, and 19% of control, respectively”
Claim · model-written summary
Siam weed extract at full strength reduced chilli germination by 19% of control.
Verbatim
e0“Siam weed extract, when applied at full strength to seed of spinach, Chinese cabbage, rape, and chilli, reduced germination by 10, 12, 21, and 19% of control, respectively”
Claim · model-written summary
Full-strength lantana and Siam weed extract decreased seedling length and fresh weight of crops.
- Taxon
- cropse0
- Treatment
- Full-strength extract of lantana and Siam weede0
- Second interactor
- Siam weede0weed
- Outcome
- seedling length and fresh weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Full-strength extract of lantana and Siam weed decreased seedling length and fresh weight of all crops”
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- no effect
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.