Abstract
Increasing crop trait diversity in oilseed rape (OR, Brassica napus L.) cropping systems by introducing frost-sensitive legume species could improve weed suppression and crop productivity. Intercrops and sole crops were compared over two years in the field in Western France. Winter OR was intercropped simultaneously with either spring faba bean (Vicia faba L.) or common vetch (Vicia sativa L.) in a row replacement design without herbicides. Each species was sown at 50% of the recommended sole crop density in alternate rows. Due to the high values of faba bean aboveground traits (height, leaf area, and biomass) and the strong competitive ability for soil N of OR, both species appeared complementary in resource utilization, and thus less soil N and light were available for weeds. The OR–faba bean intercrop was able to reduce weed biomass by 41% compared to the OR–common vetch intercrop. Furthermore, growth and competitive ability of OR for soil N were increased when intercropped with faba bean. Both grain yield and number per plant were three times higher in OR–faba bean intercrops compared to OR sole crops. Under high weed infestation, the presence of faba bean with OR reduced weed aboveground biomass by 35% and weed N accumulation by 11% compared to the OR sole crop. No change was observed in the weed community composition. We observed that a level of aboveground biomass greater than 2 t ha−1 and a soil N uptake at approximately 80 kg ha−1 was needed to reduce biomass and N content of weeds.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Faba bean traits and oilseed rape competition for soil N complemented resource use, leaving less soil N and light for weeds.
- Taxon
- oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse1 - Interactor
- weedse0weed
- Outcome
- less soil N and light were available for weedse0
- Qualifier
- complementary in resource utilizatione0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“Due to the high values of faba bean aboveground traits (height, leaf area, and biomass) and the strong competitive ability for soil N of OR, both species appeared complementary in resource utilization, and thus less soil N and light were available for weeds”
e1“oilseed rape (OR, Brassica napus L.)”
Claim · model-written summary
The oilseed rape–faba bean intercrop reduced weed biomass by 41% relative to the oilseed rape–common vetch intercrop.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- OR–faba bean intercrope0
- Interactor
- weede0weed
- Outcome
- weed biomasse0
- Direction
- reducee0
- Value
- 41%e0
- Comparator
- OR–common vetch intercrope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The OR–faba bean intercrop was able to reduce weed biomass by 41% compared to the OR–common vetch intercrop”
e1“oilseed rape (OR, Brassica napus L.)”
Claim · model-written summary
Intercropping with faba bean increased oilseed rape growth.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- intercropped with faba beane0
- Outcome
- growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and competitive ability of OR for soil N were increased when intercropped with faba bean”
e1“oilseed rape (OR, Brassica napus L.)”
Claim · model-written summary
Intercropping with faba bean increased oilseed rape competitive ability for soil N.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- intercropped with faba beane0
- Outcome
- competitive ability of OR for soil Ne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and competitive ability of OR for soil N were increased when intercropped with faba bean”
e1“oilseed rape (OR, Brassica napus L.)”
Claim · model-written summary
Oilseed rape grain yield was three times higher with faba bean intercropping than in sole crops.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- OR–faba bean intercropse0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- three timese0
- Comparator
- OR sole cropse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both grain yield and number per plant were three times higher in OR–faba bean intercrops compared to OR sole crops”
e1“oilseed rape (OR, Brassica napus L.)”
Claim · model-written summary
Oilseed rape grain number per plant was three times higher with faba bean intercropping than in sole crops.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- OR–faba bean intercropse0
- Outcome
- number per plante0
- Direction
- highere0
- Value
- three timese0
- Comparator
- OR sole cropse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both grain yield and number per plant were three times higher in OR–faba bean intercrops compared to OR sole crops”
e1“oilseed rape (OR, Brassica napus L.)”
Claim · model-written summary
Under high weed infestation, faba bean intercropping reduced weed aboveground biomass by 35% compared with sole oilseed rape.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- presence of faba bean with ORe0
- Interactor
- weede0weed
- Outcome
- weed aboveground biomasse0
- Direction
- reducede0
- Value
- 35%e0
- Qualifier
- Under high weed infestatione0
- Comparator
- OR sole crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under high weed infestation, the presence of faba bean with OR reduced weed aboveground biomass by 35% and weed N accumulation by 11% compared to the OR sole crop”
e1“oilseed rape (OR, Brassica napus L.)”
Claim · model-written summary
Under high weed infestation, faba bean intercropping reduced weed N accumulation by 11% compared with sole oilseed rape.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- presence of faba bean with ORe0
- Interactor
- weede0weed
- Outcome
- weed N accumulatione0
- Direction
- reducede0
- Value
- 11%e0
- Qualifier
- Under high weed infestatione0
- Comparator
- OR sole crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under high weed infestation, the presence of faba bean with OR reduced weed aboveground biomass by 35% and weed N accumulation by 11% compared to the OR sole crop”
e1“oilseed rape (OR, Brassica napus L.)”
Claim · model-written summary
Weed community composition showed no change.
- Taxon
- oilseed rapeBrassica napuse1
- Interactor
- weede0weed
- Outcome
- weed community compositione0
- Direction
- No changee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No change was observed in the weed community composition”
e1“oilseed rape (OR, Brassica napus L.)”
Claim · model-written summary
The authors observed that aboveground biomass greater than 2 t ha−1 was needed to reduce weed biomass and N content.
- Taxon
- oilseed rapeBrassica napuse1
- Interactor
- weedse0weed
- Outcome
- biomass and N content of weedse0
- Direction
- reducee0
- Value
- greater than 2 t ha−1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a level of aboveground biomass greater than 2 t ha−1 and a soil N uptake at approximately 80 kg ha−1 was needed to reduce biomass and N content of weeds”
e1“oilseed rape (OR, Brassica napus L.)”
Claim · model-written summary
The authors observed that soil N uptake around 80 kg ha−1 was needed to reduce weed biomass and N content.
- Taxon
- oilseed rapeBrassica napuse1
- Interactor
- weedse0weed
- Outcome
- biomass and N content of weedse0
- Direction
- reducee0
- Value
- approximately 80 kg ha−1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a level of aboveground biomass greater than 2 t ha−1 and a soil N uptake at approximately 80 kg ha−1 was needed to reduce biomass and N content of weeds”
e1“oilseed rape (OR, Brassica napus L.)”
The same questions in other papers
Vicia faba · growth · Brassica napus (oilseed rape)Results agree
2 papers in the same direction as this paper
- positive
- positive
intercropping · yield · Brassica napus (oilseed rape)Results differ
19 papers in the same direction as this paper · 8 in the opposite direction · 2 reporting no difference from an alternative
- positive
- positive
- positive
26 papers more in this group
See all 30 papers →intercropping · growth · Brassica napus (oilseed rape)Positive and negative results
9 papers in the same direction as this paper · 1 reporting no difference from an alternative
- positive
- no effect
- positive
7 papers more in this group
See all 11 papers →intercropping · weed · Brassica napus (oilseed rape)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.