Abstract
In order to evaluate the competitive effects of wild oat on winter wheat in different densities, a field experiment was conducted in Mashad in 2001 .The experiment was carried out as factorial in a randomized complete block design with four replications. The factors included wheat densities at 3 levels (300,450,600 plants/m2) and wild oat densities at 5 levels (0, 20, 40, 80,160 plants/m2). Results indicated that wild oat plant height was lower in the early stages of growth but increased in the latest stages compared to wheat. Wheat plant height increased with increases in wheat plant density. Increase in wheat plant density led to decrease in wild oat LAI and biomass. Time of canopy closure in wild oat reached faster than winter wheat (nearly 15 days).The average wheat and wild oat relative growth rates during the growth period were 0.027 and 0.034 g-l g-1 day-l, respectively. The maximum amount of wheat yield loss was nearly 47% in 160 wild oat and 300 wheat plants/m2 and in the presence of wild oat, wheat yield loss decreased as wheat plant density increased
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Claims 8
Claim · model-written summary
Wild oat was shorter than wheat early but taller later.
- Taxon
- winter wheat
Triticum aestivumt0 - Interactor
- wild oate0weed
- Outcome
- wild oat plant heighte0
- Direction
- lower in the early stages of growth but increased in the latest stagese0
- Comparator
- wheate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wild oat plant height was lower in the early stages of growth but increased in the latest stages compared to wheat”
t0“Winter Wheat (Triticum Aestivum L.)”
Claim · model-written summary
Wheat height increased with wheat density.
- Taxon
- WheatTriticum aestivume0
- Treatment
- wheat plant densitye0
- Outcome
- Wheat plant heighte0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat plant height increased with increases in wheat plant density”
Claim · model-written summary
Increasing wheat density decreased wild oat leaf area index and biomass.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Increase in wheat plant densitye0
- Interactor
- wild oate0weed
- Outcome
- wild oat LAI and biomasse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase in wheat plant density led to decrease in wild oat LAI and biomass”
Claim · model-written summary
Wild oat canopy closed about 15 days sooner than winter wheat.
- Taxon
- winter wheatTriticum aestivume0
- Interactor
- wild oate0weed
- Outcome
- Time of canopy closure in wild oate0
- Direction
- fastere0
- Value
- nearly 15 dayse0
- Comparator
- winter wheate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Time of canopy closure in wild oat reached faster than winter wheat (nearly 15 days)”
Claim · model-written summary
Mean wheat relative growth rate was 0.027 g-l g-1 day-l.
- Taxon
- wheatTriticum aestivume0
- Outcome
- relative growth ratese0
- Value
- 0.027e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average wheat and wild oat relative growth rates during the growth period were 0.027 and 0.034 g-l g-1 day-l, respectively”
Claim · model-written summary
Mean wild oat relative growth rate was 0.034 g-l g-1 day-l.
- Taxon
- wheatTriticum aestivume0
- Interactor
- wild oate0weed
- Outcome
- wild oat relative growth ratese0
- Value
- 0.034 g-l g-1 day-le0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average wheat and wild oat relative growth rates during the growth period were 0.027 and 0.034 g-l g-1 day-l, respectively”
Claim · model-written summary
Maximum wheat yield loss was nearly 47% at 160 wild oat and 300 wheat plants per square metre.
- Taxon
- wheatTriticum aestivume0
- Interactor
- wild oate0weed
- Outcome
- wheat yield losse0
- Direction
- maximume0
- Value
- nearly 47%e0
- Qualifier
- 160 wild oat and 300 wheat plants/m2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum amount of wheat yield loss was nearly 47% in 160 wild oat and 300 wheat plants/m2”
Claim · model-written summary
With wild oat present, wheat yield loss declined as wheat density increased.
- Taxon
- wheatTriticum aestivume0
- Treatment
- wheat plant densitye0
- Interactor
- wild oate0weed
- Outcome
- wheat yield losse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the presence of wild oat, wheat yield loss decreased as wheat plant density increased”
The same questions in other papers
density · growth · Triticum aestivum (wheat)Positive and negative results
80 papers in the same direction as this paper · 29 in the opposite direction
- no effect
- negative
- no effect
106 papers more in this group
See all 110 papers →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.