Abstract
This study investigated the influence of plant density on several agronomic traits of four sunflower (Helianthus annuus L.) cultivars grown at Indian Head and Saskatoon, Saskatchewan in the semiarid prairies. At populations of 40 000–85 000 plants∙ha −1 , plant density had no significant effect on seed yield. The increase in percentage oil content with increase in plant density (44.3–45.6%) was small but significant. As plant density was increased, days to flower, height and test weight increased while days to maturity, head diameter and average seed weight decreased. Cultivars × density interactions were generally not significant. Environment (five location-years) had a significant effect on all variables, and environments × cultivar interactions were significant for most of these. Results of this experiment indicated that testing of sunflower lines at several locations in the growing area would be necessary for best assessment but one plant density, suitable to that area, could be used.Key words: Sunflower, plant density, seed, oil, seed size, Helianthus annuus L.
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Claims 9
Claim · model-written summary
Plant density from 40 000–85 000 plants∙ha −1 had no significant effect on seed yield.
- Taxon
- SUNFLOWER
Helianthus annuust0 - Treatment
- plant densitye0
- Outcome
- seed yielde0
- Direction
- no significant effecte0
- Qualifier
- 40 000–85 000 plants∙ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At populations of 40 000–85 000 plants∙ha −1 , plant density had no significant effect on seed yield.”
t0“SUNFLOWER”
Claim · model-written summary
Oil content rose slightly but significantly as plant density increased.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- plant densitye0
- Outcome
- percentage oil contente0
- Direction
- increasee0
- Value
- 44.3–45.6%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in percentage oil content with increase in plant density (44.3–45.6%) was small but significant.”
t0“SUNFLOWER”
Claim · model-written summary
Days to flower, height and test weight increased with plant density.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- plant densitye0
- Outcome
- days to flower, height and test weighte0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As plant density was increased, days to flower, height and test weight increased”
t0“SUNFLOWER”
Claim · model-written summary
Days to maturity, head diameter and average seed weight decreased with plant density.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- PLANT DENSITYt0
- Outcome
- days to maturity, head diameter and average seed weighte0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while days to maturity, head diameter and average seed weight decreased”
t0“EFFECT OF PLANT DENSITY ON THE AGRONOMIC PERFORMANCE OF SUNFLOWER ON DRYLAND”
Claim · model-written summary
Cultivar-by-density interactions were generally nonsignificant.
- Taxon
- SUNFLOWERHelianthus annuust0
- Outcome
- Cultivars × density interactionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivars × density interactions were generally not significant.”
t0“SUNFLOWER”
Claim · model-written summary
Environment significantly affected every measured variable.
- Taxon
- SUNFLOWERHelianthus annuust0
- Outcome
- all variablese0
- Setting
- five location-yearse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Environment (five location-years) had a significant effect on all variables”
t0“SUNFLOWER”
Claim · model-written summary
Environment-by-cultivar interactions were significant for most variables.
- Taxon
- SUNFLOWERHelianthus annuust0
- Outcome
- environments × cultivar interactionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“environments × cultivar interactions were significant for most of these”
t0“SUNFLOWER”
Claim · model-written summary
The authors recommend testing lines at several locations.
- Taxon
- sunflowerHelianthus annuuse0
- Outcome
- testing of sunflower lines at several locations in the growing areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“testing of sunflower lines at several locations in the growing area would be necessary for best assessment”
Claim · model-written summary
The authors conclude that one locally suitable plant density could be used.
- Taxon
- SUNFLOWERHelianthus annuust0
- Outcome
- one plant density, suitable to that areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“one plant density, suitable to that area, could be used”
t0“SUNFLOWER”
The same questions in other papers
density · yield · Helianthus annuus (common sunflower)Positive and negative results
14 papers in the same direction as this paper · 70 in the opposite direction
- no effect
- positive
- positive
81 papers more in this group
See all 85 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.