Abstract
Brassica carinata A. Braun seeds contain high erucic and linolenic acids that are desirable for biofuel and biopolymer products. However, key agronomic practices to maximize carinata productivity on the Northern Great Plains are not well known. Here, we investigated the response of seed yield and quality to three key agronomic factors—herbicide, seeding rate, and N. The factorial experiment, conducted in nine environments (site‐years) on the Canadian prairies from 2014 to 2016, included two weed control options (weedy vs. weed‐controlled), three levels of N application (low = 32–97 kg N ha −1 , medium = 75–198 kg N ha −1 , and high = 117–297 kg N ha −1 ), and five seeding rates (50, 100, 150, 200, and 300 seeds m −2 ). On average, weed biomass with the herbicide‐applied treatment was 245 kg dry matter ha −1 , significantly lower than the 1338 kg dry matter ha −1 with the non‐herbicide treatment, leading to 37% greater seed yield. In four of the nine environments, medium and high N fertilizer rates increased seed yield by 29 and 45%, respectively, compared with the low‐N treatment, but N fertilizer did not affect yield in the remaining five environments. Increasing seeding rates decreased weed biomass and increased seed yield. Seed oil and protein contents ranged from 37.2 to 48.5% and 22.6 to 36.3%, respectively, and these two traits had an inverse linear relationship. These results demonstrate that carinata may be well adapted to the Northern Great Plains as an alternative oilseed crop, and that seed yield and quality responses to key agronomic factors can vary with environmental conditions.
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Claims 11
Claim · model-written summary
Herbicide reduced weed biomass to 245 versus 1338 kg dry matter ha −1 without herbicide.
- Taxon
- Brassica carinata
Brassica carinatat0 - Treatment
- herbicide‐applied treatmente0
- Interactor
- weede0weed
- Outcome
- weed biomasse0
- Direction
- lowere0
- Value
- 245 kg dry matter ha −1e0
- Qualifier
- 1338 kg dry matter ha −1e0
- Comparator
- non‐herbicide treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed biomass with the herbicide‐applied treatment was 245 kg dry matter ha −1 , significantly lower than the 1338 kg dry matter ha −1 with the non‐herbicide treatment”
t0“Brassica carinata”
Claim · model-written summary
Herbicide weed control produced 37% greater carinata seed yield.
- Taxon
- Brassica carinataBrassica carinatat0
- Treatment
- herbicide‐applied treatmente0
- Interactor
- weede0weed
- Outcome
- seed yielde0
- Direction
- greatere0
- Value
- 37%e0
- Comparator
- non‐herbicide treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed biomass with the herbicide‐applied treatment was 245 kg dry matter ha −1 , significantly lower than the 1338 kg dry matter ha −1 with the non‐herbicide treatment, leading to 37% greater seed yield”
t0“Brassica carinata”
Claim · model-written summary
Medium nitrogen increased carinata seed yield by 29% versus low nitrogen in four environments.
- Taxon
- Brassica carinataBrassica carinatat0
- Treatment
- mediume0
- Outcome
- seed yielde0
- Direction
- increasede0
- Value
- 29e0
- Qualifier
- four of the nine environmentse0
- Comparator
- low‐N treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In four of the nine environments, medium and high N fertilizer rates increased seed yield by 29 and 45%, respectively, compared with the low‐N treatment”
t0“Brassica carinata”
Claim · model-written summary
High nitrogen increased carinata seed yield by 45% versus low nitrogen in four environments.
- Taxon
- Brassica carinataBrassica carinatat0
- Treatment
- high N fertilizer ratese0
- Outcome
- seed yielde0
- Direction
- increasede0
- Value
- 45%e0
- Qualifier
- four of the nine environmentse0
- Comparator
- low‐N treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In four of the nine environments, medium and high N fertilizer rates increased seed yield by 29 and 45%, respectively, compared with the low‐N treatment”
t0“Brassica carinata”
Claim · model-written summary
Nitrogen fertilizer did not affect yield in the remaining five environments.
- Taxon
- Brassica carinataBrassica carinatat0
- Treatment
- N fertilizere0
- Outcome
- yielde0
- Direction
- did not affecte0
- Qualifier
- remaining five environmentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer did not affect yield in the remaining five environments”
t0“Brassica carinata”
Claim · model-written summary
Increasing seeding rates decreased weed biomass.
- Taxon
- Brassica carinataBrassica carinatat0
- Treatment
- Increasing seeding ratese0
- Interactor
- weede0weed
- Outcome
- weed biomasse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing seeding rates decreased weed biomass”
t0“Brassica carinata”
Claim · model-written summary
Increasing seeding rates increased carinata seed yield.
- Taxon
- Brassica carinataBrassica carinatat0
- Treatment
- Increasing seeding ratese0
- Outcome
- seed yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing seeding rates decreased weed biomass and increased seed yield”
t0“Brassica carinata”
Claim · model-written summary
Carinata seed oil content ranged from 37.2 to 48.5%.
- Taxon
- Brassica carinataBrassica carinatat0
- Outcome
- Seed oile0
- Value
- 37.2 to 48.5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed oil and protein contents ranged from 37.2 to 48.5% and 22.6 to 36.3%, respectively”
t0“Brassica carinata”
Claim · model-written summary
Carinata seed protein content ranged from 22.6 to 36.3%.
- Taxon
- Brassica carinataBrassica carinatat0
- Outcome
- protein contentse0
- Value
- 22.6 to 36.3%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed oil and protein contents ranged from 37.2 to 48.5% and 22.6 to 36.3%, respectively”
t0“Brassica carinata”
Claim · model-written summary
Seed oil and protein contents had an inverse linear relationship.
- Taxon
- Brassica carinataBrassica carinatat0
- Organ / stage
- Seede0
- Outcome
- Seed oil and protein contentse0
- Direction
- inversee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed oil and protein contents ranged from 37.2 to 48.5% and 22.6 to 36.3%, respectively, and these two traits had an inverse linear relationship.”
t0“Brassica carinata”
Claim · model-written summary
Carinata may be adapted to the Northern Great Plains as an alternative oilseed crop.
- Taxon
- carinataBrassica carinatae0
- Outcome
- well adapted to the Northern Great Plains as an alternative oilseed crope0
- Setting
- Northern Great Plainse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carinata may be well adapted to the Northern Great Plains as an alternative oilseed crop”
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See all 11 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.