Abstract
Abstract Carinata ( Brassica carinata A. Braun), a non‐food oilseed and an alternative biofuel feedstock, has received attention for its potential as a low‐input option for production in the semi‐arid regions of the Northern Great Plains (NGP). This study was conducted to (a) determine the economic optimum N and S fertilization rates and (b) determine the interactive effects of N and S fertilization on seed yield and agronomic traits in carinata. The field experiment conducted in 2017 and 2018 at Brookings, SD, had four N rates (56, 84, 112, and 140 kg N ha −1 ) and three S rates (0, 22, and 45 kg S ha −1 ). Increasing N rate increased seed and oil yield each peaking at 112 kg N ha −1 in both years. Applying S fertilizer increased seed and oil yield and oil concentration over the control but with the two S rates performing similar in both years. In the absence of S application, seed yield was reduced irrespective of N rate indicating that S is critical to obtain a positive response to N fertilizer. Economically optimal N rate ranged from 47 to 93 kg N ha −1 whereas economic optimum S rate ranged from 20 to 26 kg S ha −1 . The economic optimum yield ranged from 1.0 Mg ha −1 to 1.5 Mg ha −1 . These findings suggest that carinata seed yield and agronomic trait response to N fertilization can vary depending on S availability in the soil.
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Claims 7
Claim · model-written summary
Increasing N increased seed yield, peaking at 112 kg N ha −1 in both years.
- Taxon
- Carinata
Brassica carinatae1 - Treatment
- Increasing N ratee0
- Outcome
- seed yielde2
- Direction
- increasede0
- Value
- 112 kg N ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing N rate increased seed and oil yield each peaking at 112 kg N ha −1 in both years.”
e1“Carinata ( Brassica carinata A. Braun)”
e2“In the absence of S application, seed yield was reduced irrespective of N rate”
Claim · model-written summary
Increasing N increased oil yield, peaking at 112 kg N ha −1 in both years.
- Taxon
- CarinataBrassica carinatae1
- Treatment
- Increasing N ratee0
- Outcome
- oil yielde0
- Direction
- increasede0
- Value
- 112 kg N ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing N rate increased seed and oil yield each peaking at 112 kg N ha −1 in both years.”
e1“Carinata ( Brassica carinata A. Braun)”
Claim · model-written summary
S fertilizer increased seed and oil yield and oil concentration over control, with similar performance at both S rates.
- Taxon
- CarinataBrassica carinatae1
- Treatment
- S fertilizere0
- Outcome
- seed and oil yield and oil concentratione0
- Direction
- increasede0
- Qualifier
- two S rates performing similare0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying S fertilizer increased seed and oil yield and oil concentration over the control but with the two S rates performing similar in both years.”
e1“Carinata ( Brassica carinata A. Braun)”
Claim · model-written summary
Without S application, seed yield was reduced regardless of N rate.
- Taxon
- CarinataBrassica carinatae1
- Treatment
- absence of S applicatione0
- Outcome
- seed yielde0
- Direction
- reducede0
- Qualifier
- irrespective of N ratee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the absence of S application, seed yield was reduced irrespective of N rate”
e1“Carinata ( Brassica carinata A. Braun)”
Claim · model-written summary
Economically optimal N rate ranged from 47 to 93 kg N ha −1.
- Taxon
- CarinataBrassica carinatae1
- Outcome
- Economically optimal N ratee0
- Value
- 47 to 93 kg N ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Economically optimal N rate ranged from 47 to 93 kg N ha −1”
e1“Carinata ( Brassica carinata A. Braun)”
Claim · model-written summary
Economically optimal S rate ranged from 20 to 26 kg S ha −1.
- Taxon
- CarinataBrassica carinatae1
- Outcome
- economic optimum S ratee0
- Value
- 20 to 26 kg S ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“economic optimum S rate ranged from 20 to 26 kg S ha −1”
e1“Carinata ( Brassica carinata A. Braun)”
Claim · model-written summary
Economic optimum yield ranged from 1.0 to 1.5 Mg ha −1.
- Taxon
- CarinataBrassica carinatae1
- Outcome
- economic optimum yielde0
- Value
- 1.0 Mg ha −1 to 1.5 Mg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The economic optimum yield ranged from 1.0 Mg ha −1 to 1.5 Mg ha −1 .”
e1“Carinata ( Brassica carinata A. Braun)”
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