Abstract
Competitive interactions of wheat and wild oats in relation to variations in plant density of both species were investigated in field studies under irrigation and added fertilizer. Competition studies included comparisons by both additive and replacement series. The additive series was used to study plant responses to competition under fixed density of wheat and increasing density of wild oats. The replacement series was used to study plant responses to competition under constant total plant density with differing proportions of wheat and wild oats. On a per plant basis, shoot dry weight and leaf area index of wild oats were less than those of wheat at anthesis. However, the replacement series experiment indicated that wheat and wild oats were equivalent in competitiveness. Relative density of wild oats gave a better regression fit for wheat yield than did absolute wild oats density (r 2 values of 0.83 and 0.61, respectively). Yield of wheat grain was linearly proportional to relative density of wild oats.
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Claims 5
Claim · model-written summary
At anthesis, wild oats had less shoot dry weight per plant than wheat.
- Organ / stage
- anthesise0
- Interactor
- wheat
Triticum aestivume0other - Outcome
- shoot dry weighte0
- Direction
- lesse0
- Comparator
- wheate0
AvenaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On a per plant basis, shoot dry weight and leaf area index of wild oats were less than those of wheat at anthesis”
Claim · model-written summary
At anthesis, wild oats had less leaf area index per plant than wheat.
- Organ / stage
- anthesise0
- Interactor
- wheatTriticum aestivume0other
- Outcome
- leaf area indexe0
- Direction
- lesse0
- Comparator
- wheate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On a per plant basis, shoot dry weight and leaf area index of wild oats were less than those of wheat at anthesis”
Claim · model-written summary
Wheat and wild oats were equally competitive in the replacement series.
- Taxon
- wheatTriticum aestivume0
- Outcome
- equivalent in competitivenesse0
- Direction
- equivalente0
- Comparator
- wild oatse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the replacement series experiment indicated that wheat and wild oats were equivalent in competitiveness”
Claim · model-written summary
Relative wild oat density fit wheat yield better than absolute wild oat density.
- Taxon
- wheatTriticum aestivume0
- Outcome
- regression fit for wheat yielde0
- Direction
- bettere0
- Value
- 0.83e0
- Qualifier
- 0.61e0
- Comparator
- absolute wild oats densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative density of wild oats gave a better regression fit for wheat yield than did absolute wild oats density (r 2 values of 0.83 and 0.61, respectively)”
Claim · model-written summary
Wheat grain yield was linearly proportional to relative wild oat density.
- Taxon
- wheatTriticum aestivume0
- Outcome
- Yield of wheat graine0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield of wheat grain was linearly proportional to relative density of wild oats”