Abstract
The sustainability of cereal cropping systems may be improved by the addition of legumes. The effects of seeding rate were studied for intercrops of berseem clover (Trifolium alexandrinum L.) and oats (Avena sativa L.). Bigbee berseem clover, an annual forage legume, was intercropped with oats on a Black Chernozemic soil at Edmonton, Alberta, in 1996 and 1997. Berseem dry matter (DM) yields were greatly reduced by increasing oat plant density. There was a linear decline in berseem DM with increasing oat DM or oat tiller density. The relationship between oat plant density and berseem DM was nonlinear and varied between years and harvests. Berseem yield reductions varied from 44 to 82% with target densities of 100 oat plants m -2 . Effects of berseem seeding rate (BSR) on oats varied between years. Increasing BSR from 6 to 24 kg ha -1 decreased oat tillering, oat DM and oat plant DM by 22–51, 0–57 and 8–51%, respectively, and increased oat tiller DM by 0–18%, with oats at 10 to 20 plants m -2 . Differences between years were likely due to environmental factors and relative emergence times. After a silage-stage harvest, oat regrowth was negligible but berseem regrowth averaged 3.1 Mg ha -1 DM. Key words: Cereal-legume intercrop, Trifolium alexandrinum L, Avena sativa L, competition models
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 10
Claim · model-written summary
Increasing oat density greatly reduced berseem dry matter yield.
Verbatim
e0“Berseem dry matter (DM) yields were greatly reduced by increasing oat plant density”
Claim · model-written summary
Berseem dry matter declined linearly as oat dry matter or tiller density increased.
- Taxon
- berseeme0
- Interactor
- oat
Avena sativae0weed - Outcome
- berseem DMe0
- Direction
- linear declinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a linear decline in berseem DM with increasing oat DM or oat tiller density”
Claim · model-written summary
Oat plant density had a nonlinear relationship with berseem dry matter that varied by year and harvest.
- Taxon
- berseeme0
- Interactor
- oatAvena sativae0weed
- Outcome
- berseem DMe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relationship between oat plant density and berseem DM was nonlinear and varied between years and harvests”
Claim · model-written summary
Target density of 100 oat plants m -2 reduced berseem yield by 44 to 82%.
- Taxon
- Berseeme0
- Treatment
- 100 oat plants m -2e0
- Outcome
- Berseem yielde0
- Direction
- reductionse0
- Value
- 44 to 82%e0
Not reportedComparator
Verbatim
e0“Berseem yield reductions varied from 44 to 82% with target densities of 100 oat plants m -2”
Claim · model-written summary
Raising berseem seeding rate reduced oat tillering by 22–51%.
- Taxon
- oatAvena sativae0
- Treatment
- Increasing BSR from 6 to 24 kg ha -1e0
- Outcome
- oat tilleringe0
- Direction
- decreasede0
- Value
- 22–51e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing BSR from 6 to 24 kg ha -1 decreased oat tillering, oat DM and oat plant DM by 22–51, 0–57 and 8–51%, respectively”
Claim · model-written summary
Raising berseem seeding rate reduced oat dry matter by 0–57%.
- Taxon
- oatAvena sativae0
- Treatment
- Increasing BSR from 6 to 24 kg ha -1e0
- Outcome
- oat DMe0
- Direction
- decreasede0
- Value
- 0–57e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing BSR from 6 to 24 kg ha -1 decreased oat tillering, oat DM and oat plant DM by 22–51, 0–57 and 8–51%, respectively”
Claim · model-written summary
Raising berseem seeding rate reduced oat plant dry matter by 8–51%.
- Taxon
- oatAvena sativae0
- Treatment
- Increasing BSR from 6 to 24 kg ha -1e0
- Outcome
- oat plant DMe0
- Direction
- decreasede0
- Value
- 8–51%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing BSR from 6 to 24 kg ha -1 decreased oat tillering, oat DM and oat plant DM by 22–51, 0–57 and 8–51%, respectively”
Claim · model-written summary
Raising berseem seeding rate increased oat tiller dry matter by 0–18%.
- Taxon
- oatsAvena sativae0
- Outcome
- oat tiller DMe0
- Direction
- increasede0
- Value
- 0–18%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased oat tiller DM by 0–18%, with oats at 10 to 20 plants m -2”
Claim · model-written summary
After silage harvest, oat regrowth was negligible.
- Taxon
- oatAvena sativae0
- Outcome
- oat regrowthe0
- Direction
- negligiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After a silage-stage harvest, oat regrowth was negligible”
Claim · model-written summary
After silage harvest, berseem regrowth averaged 3.1 Mg ha -1 DM.
Verbatim
e0“berseem regrowth averaged 3.1 Mg ha -1 DM”
The same questions in other papers
density · growth · Avena sativa (oats)Positive and negative results
5 papers in the same direction as this paper · 11 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 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.