Abstract
Core Ideas Brassica carinata is an emerging dedicated oilseed feedstock for ‘drop‐in’ biofuels. Sequential flowering produces a mixture pods of different maturity. Harvest aids enhance seed maturation, crop dry down with little effect on yield. Applying harvest aid 14 to 21 d after physiological maturity when seed moisture is <28.5% accelerate transition to summer crops by 7 to 14 d. Brassica carinata (carinata) is an emerging dedicated oilseed feedstock for ‘drop‐in’ biofuels and renewable bioproducts. There is great potential for carinata to be produced as a winter crop providing economic and environmental benefits in the Southeast United States. The indeterminate flowering of carinata produces pods of different maturity making it difficult to determine the optimum harvest time. The objective of this study was to determine the effects of harvest aid and application timing on crop maturation, seed and oil yields, and fatty acid composition. B. carinata was evaluated in a 2‐yr field study at NFREC, Quincy, FL, during the 2014–2015 and 2015–2016 growing seasons. Treatments were initiated when seed moisture was at 501 to 558 g kg –1 and continued at 7 d intervals for 4 wk. In 2015, harvesting at 21 d after physiological maturity (DAPM) produced 28% greater yield than earlier harvest dates while in 2016, harvesting at 14 DAPM or later produced 31% greater yields than earlier harvests. Swathing reduced seed yield by 11% relative to control in 2015, however, no differences occurred in 2016. Seed shattering increased with maturation regardless of harvest aid and was greatest at 21 DAPM. The use of a harvest aid 14 to 21 DAPM, when seed moisture is <285 g kg –1 and more than 80% of the seeds have changed color, would accelerate the transition to summer crops by 7 to 14 d. These results indicate the potential of harvest aids to accelerate seed dry‐down and uniformity thereby facilitating the timely planting of subsequent summer crops.
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Claims 8
Claim · model-written summary
Harvesting at 21 DAPM in 2015 gave 28% greater yield than earlier harvest dates.
- Taxon
- Winter Carinata
Brassica carinatat0 - Treatment
- harvesting at 21 d after physiological maturity (DAPM)e0
- Outcome
- yielde0
- Direction
- greatere0
- Value
- 28%e0
- Comparator
- earlier harvest datese0
- Setting
- NFREC, Quincy, FLe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2015, harvesting at 21 d after physiological maturity (DAPM) produced 28% greater yield than earlier harvest dates”
t0“Winter Carinata Maturation”
e7“field study at NFREC, Quincy, FL”
Claim · model-written summary
Harvesting at 14 DAPM or later in 2016 gave 31% greater yields than earlier harvests.
- Taxon
- Winter CarinataBrassica carinatat0
- Treatment
- harvesting at 14 DAPM or latere1
- Outcome
- yieldse1
- Direction
- greatere1
- Value
- 31%e1
- Comparator
- earlier harvestse1
- Setting
- NFREC, Quincy, FLe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“in 2016, harvesting at 14 DAPM or later produced 31% greater yields than earlier harvests”
t0“Winter Carinata Maturation”
e7“field study at NFREC, Quincy, FL”
Claim · model-written summary
Swathing reduced seed yield by 11% relative to control in 2015.
- Taxon
- Winter CarinataBrassica carinatat0
- Treatment
- Swathinge2
- Outcome
- seed yielde2
- Direction
- reducede2
- Value
- 11%e2
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Swathing reduced seed yield by 11% relative to control in 2015, however, no differences occurred in 2016”
t0“Winter Carinata Maturation”
Claim · model-written summary
Swathing made no difference in seed yield in 2016.
- Taxon
- Winter CarinataBrassica carinatat0
- Treatment
- Swathinge2
- Outcome
- seed yielde2
- Direction
- no differencese2
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Swathing reduced seed yield by 11% relative to control in 2015, however, no differences occurred in 2016”
t0“Winter Carinata Maturation”
Claim · model-written summary
Seed shattering increased with maturation and was greatest at 21 DAPM.
- Taxon
- Winter CarinataBrassica carinatat0
- Organ / stage
- maturatione3
- Outcome
- Seed shatteringe3
- Direction
- increasede3
- Qualifier
- greatest at 21 DAPMe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Seed shattering increased with maturation regardless of harvest aid and was greatest at 21 DAPM”
t0“Winter Carinata Maturation”
Claim · model-written summary
A harvest aid applied 14 to 21 DAPM would accelerate the transition to summer crops by 7 to 14 days.
- Taxon
- Winter CarinataBrassica carinatat0
- Treatment
- harvest aid 14 to 21 DAPMe4
- Outcome
- accelerate the transition to summer cropse5
- Value
- 7 to 14 de5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The use of a harvest aid 14 to 21 DAPM”
e5“would accelerate the transition to summer crops by 7 to 14 d”
t0“Winter Carinata Maturation”
Claim · model-written summary
Harvest aids enhanced seed maturation and crop dry down.
- Taxon
- Winter CarinataBrassica carinatat0
- Treatment
- Harvest aidse6
- Outcome
- seed maturation, crop dry downe6
- Direction
- enhancee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Harvest aids enhance seed maturation, crop dry down with little effect on yield”
t0“Winter Carinata Maturation”
Claim · model-written summary
Harvest aids had little effect on carinata yield.
- Taxon
- Winter CarinataBrassica carinatat0
- Treatment
- Harvest aidse6
- Outcome
- yielde6
- Direction
- little effecte6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Harvest aids enhance seed maturation, crop dry down with little effect on yield”
t0“Winter Carinata Maturation”
The same questions in other papers
stage · yield · Brassica carinata (Ethiopian mustard)Results agree
1 paper in the same direction as this paper
- positive
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.