Abstract
Considering yield stability and yield penalty, adoption of competitive cultivars in a sustainable weed management strategy would be beneficial from both economic and environmental view points. This study involving thirteen rice germplasm grown under weedy and weed- free conditions was conducted to compare weed suppressive ability and yield potential under aerobic soil conditions, and determine suitable cultivars for countries in tropical Asia. Germplasm varied widely in yield ability, AERON 1 topped the list with a modest figure of only 2.72 Mg/ha. Across the germplasm, mean weed pressure was as high as 244 g/m2 against 596 g/m2 in weed monoculture. Rice germplasm, on average, reduced weed pressure by almost 59%. AERON 1 emerged as the most suppressive and decreased weed dry weight by 76%. Weed-inflicted relative yield loss ranged from 23 to 53% and AERON 1 allowed least yield penalty. In general, traits related to faster early height growth rate, vigor, and aboveground crop biomass were strongly (negatively) associated with weed biomass. Tillering ability was correlated positively with weed biomass, while plant erectness was not correlated with weed biomass. No trade off between weed suppressing ability and yield potential was traced. The present study confirms the feasibility of weed competitive cultivars as the key tool for sustainable weed management, and suggests breeding for weed suppressive aerobic rice by combining traits associated with weed competitiveness.
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Claims 11
Claim · model-written summary
Yield ability varied widely, with AERON 1 leading at 2.72 Mg/ha.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germplasm varied widely in yield ability, AERON 1 topped the list with a modest figure of only 2.72 Mg/ha.”
t0“rice”
Claim · model-written summary
Mean weed pressure across rice germplasm was 244 g/m2 versus 596 g/m2 in weed monoculture.
- Taxon
- rice
Oryza sativat0 - Interactor
- weede0weed
- Outcome
- mean weed pressuree0
- Direction
- lowerinferrede0
- Value
- 244 g/m2e0
- Qualifier
- 596 g/m2e0
- Comparator
- weed monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Across the germplasm, mean weed pressure was as high as 244 g/m2 against 596 g/m2 in weed monoculture.”
t0“rice”
Claim · model-written summary
Rice germplasm reduced weed pressure by almost 59% on average.
- Taxon
- RiceOryza sativae0
- Treatment
- Rice germplasme0
- Interactor
- weede0weed
- Outcome
- weed pressuree0
- Direction
- reducede0
- Value
- almost 59%e0
- Comparator
- weed monoculturee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice germplasm, on average, reduced weed pressure by almost 59%.”
e1“against 596 g/m2 in weed monoculture”
Claim · model-written summary
AERON 1 was most suppressive and decreased weed dry weight by 76%.
- Taxon
- riceOryza sativat0
- Material
- AERON 1e0
- Treatment
- AERON 1e0
- Interactor
- weede0weed
- Outcome
- weed dry weighte0
- Direction
- decreasede0
- Value
- 76%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AERON 1 emerged as the most suppressive and decreased weed dry weight by 76%.”
t0“rice”
Claim · model-written summary
Weed-inflicted relative yield loss ranged from 23 to 53%.
- Taxon
- riceOryza sativat0
- Interactor
- Weede0weed
- Outcome
- relative yield losse0
- Direction
- losse0
- Value
- 23 to 53%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed-inflicted relative yield loss ranged from 23 to 53% and AERON 1 allowed least yield penalty.”
t0“rice”
Claim · model-written summary
AERON 1 allowed the least yield penalty.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed-inflicted relative yield loss ranged from 23 to 53% and AERON 1 allowed least yield penalty.”
t0“rice”
Claim · model-written summary
Faster early height growth, vigor and aboveground biomass were strongly negatively associated with weed biomass.
- Taxon
- riceOryza sativat0
- Interactor
- weede0weed
- Outcome
- weed biomasse0
- Direction
- negativelye0
- Qualifier
- faster early height growth rate, vigor, and aboveground crop biomasse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general, traits related to faster early height growth rate, vigor, and aboveground crop biomass were strongly (negatively) associated with weed biomass.”
t0“rice”
Claim · model-written summary
Tillering ability correlated positively with weed biomass.
- Taxon
- riceOryza sativat0
- Interactor
- weede0weed
- Outcome
- weed biomasse0
- Direction
- positivelye0
- Qualifier
- Tillering abilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillering ability was correlated positively with weed biomass”
t0“rice”
Claim · model-written summary
Plant erectness was not correlated with weed biomass.
- Taxon
- riceOryza sativat0
- Interactor
- weede0weed
- Outcome
- weed biomasse0
- Direction
- not correlatede0
- Qualifier
- plant erectnesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant erectness was not correlated with weed biomass.”
t0“rice”
Claim · model-written summary
No tradeoff between weed suppression and yield potential was detected.
- Taxon
- riceOryza sativat0
- Interactor
- weede0weed
- Outcome
- yield potentiale0
- Direction
- No trade offe0
- Qualifier
- weed suppressing abilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No trade off between weed suppressing ability and yield potential was traced.”
t0“rice”
Claim · model-written summary
The authors support weed-competitive cultivars for sustainable management and breeding aerobic rice by combining competitiveness traits.
- Taxon
- riceOryza sativae0
- Interactor
- weede0weed
- Outcome
- breeding for weed suppressive aerobic rice by combining traits associated with weed competitivenesse0
- Qualifier
- weed competitive cultivars as the key tool for sustainable weed managemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The present study confirms the feasibility of weed competitive cultivars as the key tool for sustainable weed management, and suggests breeding for weed suppressive aerobic rice by combining traits associated with weed competitiveness.”