Abstract
Field experiments were conducted in 2003, 2004, and 2005 on a S‐deficient Gray Luvisol (Boralf) soil near Star City, in northeastern Saskatchewan, to determine yield, seed quality and S uptake response of different Brassica ( B. ) oilseed species/cultivars to S deficiency and S fertilization. A total of 20 treatments were tested in a factorial combination of four oilseed crops ( B. juncea canola cv. Arid, B. juncea canola cv. Amulet, B. juncea mustard cv. Cutlass, and B. napus cv. InVigor 2663 hybrid canola) and five rates of potassium sulfate fertilizer (0, 10, 20, 30, and 40 kg S ha −1 ). All B. species/cultivars responded positively for seed yield and most other parameters to S fertilizer in all 3 yr, but the magnitude of response varied with species/cultivar and year. Seed yield was highest with Cutlass juncea mustard in a dry year (2003), but was highest with InVigor 2663 hybrid canola in years with above‐average precipitation (2004 and 2005). Seed yield was usually maximized at the rate of 30 kg S ha −1 for all B. species/cultivars. Oil concentration in seed increased with S fertilization for all B. species/cultivars. There was a significant (albeit small) increase of protein concentration in seed due to S fertilization. Cutlass juncea mustard accumulated considerably high concentrations of glucosinolates in seed, but glucosinolate concentrations were low in other B. species/cultivars. Sulfur uptake in seed was highest with Cutlass juncea mustard in all years. The effects of S deficiency and applied S were more pronounced on seed than straw. In conclusion, S fertilizer requirements for optimum seed yield were similar for all the B. species/cultivars used in this study on S‐deficient soil, but higher yielding types of B. would produce greater seed yield by using S more efficiently.
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Claims 13
Claim · model-written summary
Sulfur fertilizer responded positively for seed yield in all Brassica species and cultivars.
- Treatment
- S fertilizere1
- Outcome
- seed yielde1
- Direction
- responded positivelye1
- Setting
- near Star City, in northeastern Saskatchewane2
BrassicaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“All B. species/cultivars responded positively for seed yield and most other parameters to S fertilizer in all 3 yr, but the magnitude of response varied with species/cultivar and year”
e2“near Star City, in northeastern Saskatchewan”
Claim · model-written summary
The magnitude of the response to S fertilization varied with species/cultivar and year.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“All B. species/cultivars responded positively for seed yield and most other parameters to S fertilizer in all 3 yr, but the magnitude of response varied with species/cultivar and year”
Claim · model-written summary
Cutlass juncea mustard had the highest seed yield in a dry year (2003).
- Material
- Cutlass juncea mustarde1
- Outcome
- Seed yielde1
- Direction
- higheste1
- Qualifier
- in a dry year (2003)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“Seed yield was highest with Cutlass juncea mustard in a dry year (2003)”
Claim · model-written summary
InVigor 2663 hybrid canola had the highest seed yield in years with above-average precipitation (2004 and 2005).
- Material
- InVigor 2663 hybrid canolae1
- Outcome
- Seed yielde1
- Direction
- higheste1
- Qualifier
- in years with above‐average precipitation (2004 and 2005)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“Seed yield was highest with Cutlass juncea mustard in a dry year (2003), but was highest with InVigor 2663 hybrid canola in years with above‐average precipitation (2004 and 2005)”
Claim · model-written summary
Seed yield was usually maximized at 30 kg S ha −1 for all Brassica species and cultivars.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“Seed yield was usually maximized at the rate of 30 kg S ha −1 for all B. species/cultivars”
Claim · model-written summary
Oil concentration in seed increased with S fertilization for all Brassica species and cultivars.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“Oil concentration in seed increased with S fertilization for all B. species/cultivars”
Claim · model-written summary
Protein concentration in seed increased significantly, though slightly, due to S fertilization.
- Treatment
- S fertilizatione1
- Outcome
- protein concentration in seede1
- Direction
- increasee1
- Qualifier
- albeit smalle1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“There was a significant (albeit small) increase of protein concentration in seed due to S fertilization”
Claim · model-written summary
Cutlass juncea mustard accumulated considerably high glucosinolate concentrations in seed.
- Material
- Cutlass juncea mustarde1
- Outcome
- glucosinolates in seede1
- Qualifier
- considerably high concentrationse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“Cutlass juncea mustard accumulated considerably high concentrations of glucosinolates in seed”
Claim · model-written summary
Glucosinolate concentrations were low in the other Brassica species and cultivars.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“glucosinolate concentrations were low in other B. species/cultivars”
Claim · model-written summary
Sulfur uptake in seed was highest in Cutlass juncea mustard in all years.
- Material
- Cutlass juncea mustarde1
- Outcome
- Sulfur uptake in seede1
- Direction
- higheste1
- Qualifier
- in all yearse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“Sulfur uptake in seed was highest with Cutlass juncea mustard in all years”
Claim · model-written summary
Effects of S deficiency and applied S were more pronounced on seed than on straw.
- Organ / stage
- seede1
- Outcome
- The effects of S deficiency and applied Se1
- Direction
- more pronouncede1
- Comparator
- strawe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“The effects of S deficiency and applied S were more pronounced on seed than straw”
Claim · model-written summary
S fertilizer requirements for optimum seed yield were similar for all Brassica species and cultivars on S-deficient soil.
- Outcome
- S fertilizer requirements for optimum seed yielde1
- Direction
- similare1
- Setting
- on S‐deficient soile1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“S fertilizer requirements for optimum seed yield were similar for all the B. species/cultivars used in this study on S‐deficient soil”
Claim · model-written summary
Higher yielding Brassica types would produce greater seed yield by using S more efficiently.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Brassica ( B. ) oilseed species/cultivars”
e1“but higher yielding types of B. would produce greater seed yield by using S more efficiently”
The same questions in other papers
sulfur atom · yield · BrassicaResults agree
1 paper in the same direction as this paper
- positive
sulfur atom · quality: oil · BrassicaResults agree
1 paper in the same direction as this paper
- positive
sulfur atom · quality: protein · BrassicaResults agree
1 paper in the same direction as this paper
- positive
fertilization · quality: oil · BrassicaPositive and negative results
1 in the opposite direction
- negative
fertilization · yield · BrassicaResults agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.