Abstract
To compare the effects of varying seeding rate on the agronomic performance, phenology and seed quality of hybrid and conventional summer rape cultivars, four hybrid and two conventional summer rape cultivars were seeded at 1.5, 3.0, 4.5, 6.0 and 9.0 kg ha −1 at two locations for 3 yr. The hybrid cultivars were, very importantly, 24% higher yielding and produced 50% more total dry matter than the conventional cultivars. The hybrid cultivars were, on average, 1.3% lower in seed oil content, 1.0% higher in seed protein content and equal in sum of oil and protein in the seed compared with the conventional cultivars. The hybrid cultivars were on average, 1.3 d later to 50% flowering and 1.1 d later to maturity than the average for the conventional cultivars, (i.e., equal or earlier to flowering and maturity than Regent). The hybrid cultivars were also 3.9% lower in harvest index and 1.3 ppm lower in chlorophyll content than the conventional cultivars. In spite of these differences, there were no significant cultivar-by-seeding-rate interactions, indicating that the hybrid and conventional cultivars responded similarly to varying seeding rate. Lodging, days to 50% flowering, days to maturity, harvest index, survival, oil content and protein content displayed significant linear responses to varying seeding rate. Stand at maturity, seed yield and total dry matter production displayed significant linear and quadratic responses to varying seeding rate. Varying seeding rate had no effect on seed formation period, the sum of oil and protein content, or chlorophyll content. A seeding rate of 6 kg ha −1 maximized seed yield for both hybrid and conventional summer rape cultivars.Key words: Brassica napus, canola, seed quality, agronomy, phenology
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Claims 15
Claim · model-written summary
Hybrid cultivars yielded 24% more than conventional cultivars.
- Taxon
- summer rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Material
- hybrid cultivarse0
- Outcome
- yieldinge0
- Direction
- highere0
- Value
- 24%e0
- Comparator
- conventional cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“The hybrid cultivars were, very importantly, 24% higher yielding and produced 50% more total dry matter than the conventional cultivars.”
t0“summer rape”
Claim · model-written summary
Hybrid cultivars produced 50% more total dry matter.
- Taxon
- summer rapeBrassica napust0
- Material
- hybrid cultivarse0
- Outcome
- total dry mattere0
- Direction
- moree0
- Value
- 50%e0
- Comparator
- conventional cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid cultivars were, very importantly, 24% higher yielding and produced 50% more total dry matter than the conventional cultivars.”
t0“summer rape”
Claim · model-written summary
Hybrid cultivars had 1.3% lower seed oil content.
- Taxon
- summer rapeBrassica napust0
- Material
- hybrid cultivarse0
- Outcome
- seed oil contente0
- Direction
- lowere0
- Value
- 1.3%e0
- Comparator
- conventional cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid cultivars were, on average, 1.3% lower in seed oil content, 1.0% higher in seed protein content and equal in sum of oil and protein in the seed compared with the conventional cultivars.”
t0“summer rape”
Claim · model-written summary
Hybrid cultivars had 1.0% higher seed protein content.
- Taxon
- summer rapeBrassica napust0
- Material
- hybrid cultivarse0
- Outcome
- seed protein contente0
- Direction
- highere0
- Value
- 1.0%e0
- Comparator
- conventional cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid cultivars were, on average, 1.3% lower in seed oil content, 1.0% higher in seed protein content and equal in sum of oil and protein in the seed compared with the conventional cultivars.”
t0“summer rape”
Claim · model-written summary
Hybrids and conventional cultivars had equal summed seed oil and protein.
- Taxon
- summer rapeBrassica napust0
- Material
- hybrid cultivarse0
- Outcome
- sum of oil and protein in the seede0
- Direction
- equale0
- Comparator
- conventional cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid cultivars were, on average, 1.3% lower in seed oil content, 1.0% higher in seed protein content and equal in sum of oil and protein in the seed compared with the conventional cultivars.”
t0“summer rape”
Claim · model-written summary
Hybrid cultivars reached 50% flowering 1.3 days later.
- Taxon
- summer rapeBrassica napust0
- Material
- hybrid cultivarse0
- Outcome
- 50% floweringe0
- Direction
- latere0
- Value
- 1.3 de0
- Comparator
- conventional cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid cultivars were on average, 1.3 d later to 50% flowering and 1.1 d later to maturity than the average for the conventional cultivars”
t0“summer rape”
Claim · model-written summary
Hybrid cultivars matured 1.1 days later.
- Taxon
- summer rapeBrassica napust0
- Material
- hybrid cultivarse0
- Outcome
- maturitye0
- Direction
- latere0
- Value
- 1.1 de0
- Comparator
- conventional cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid cultivars were on average, 1.3 d later to 50% flowering and 1.1 d later to maturity than the average for the conventional cultivars”
t0“summer rape”
Claim · model-written summary
Hybrid cultivars had 3.9% lower harvest index.
- Taxon
- summer rapeBrassica napust0
- Material
- hybrid cultivarse0
- Outcome
- harvest indexe0
- Direction
- lowere0
- Value
- 3.9%e0
- Comparator
- conventional cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid cultivars were also 3.9% lower in harvest index and 1.3 ppm lower in chlorophyll content than the conventional cultivars.”
t0“summer rape”
Claim · model-written summary
Hybrid cultivars had 1.3 ppm lower chlorophyll content.
- Taxon
- summer rapeBrassica napust0
- Material
- hybrid cultivarse0
- Outcome
- chlorophyll contente0
- Direction
- lowere0
- Value
- 1.3 ppme0
- Comparator
- conventional cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid cultivars were also 3.9% lower in harvest index and 1.3 ppm lower in chlorophyll content than the conventional cultivars.”
t0“summer rape”
Claim · model-written summary
No significant cultivar-by-seeding-rate interactions were detected.
- Taxon
- summer rapeBrassica napust0
- Outcome
- cultivar-by-seeding-rate interactionse0
- Direction
- no significante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were no significant cultivar-by-seeding-rate interactions, indicating that the hybrid and conventional cultivars responded similarly to varying seeding rate.”
t0“summer rape”
Claim · model-written summary
Lodging, flowering, maturity, harvest index, survival, oil content, and protein content had significant linear responses to seeding rate.
- Taxon
- summer rapeBrassica napust0
- Treatment
- varying seeding ratee0
- Outcome
- Lodging, days to 50% flowering, days to maturitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lodging, days to 50% flowering, days to maturity, harvest index, survival, oil content and protein content displayed significant linear responses to varying seeding rate.”
t0“summer rape”
Claim · model-written summary
Harvest index, survival, oil content and protein content had significant linear responses to seeding rate.
- Taxon
- summer rapeBrassica napust0
- Treatment
- varying seeding ratee0
- Outcome
- harvest index, survival, oil content and protein contente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lodging, days to 50% flowering, days to maturity, harvest index, survival, oil content and protein content displayed significant linear responses to varying seeding rate.”
t0“summer rape”
Claim · model-written summary
Mature stand, seed yield and dry matter had significant linear and quadratic responses to seeding rate.
- Taxon
- summer rapeBrassica napust0
- Treatment
- varying seeding ratee0
- Outcome
- Stand at maturity, seed yield and total dry matter productione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stand at maturity, seed yield and total dry matter production displayed significant linear and quadratic responses to varying seeding rate.”
t0“summer rape”
Claim · model-written summary
Seeding rate did not affect seed formation period, summed oil and protein content, or chlorophyll content.
- Taxon
- summer rapeBrassica napust0
- Treatment
- Varying seeding ratee0
- Outcome
- seed formation period, the sum of oil and protein content, or chlorophyll contente0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Varying seeding rate had no effect on seed formation period, the sum of oil and protein content, or chlorophyll content.”
t0“summer rape”
Claim · model-written summary
A seeding rate of 6 kg ha −1 maximized seed yield for both cultivar types.
- Taxon
- summer rapeBrassica napuse0
- Material
- hybrid and conventional summer rape cultivarse0
- Treatment
- 6 kg ha −1e0
- Outcome
- seed yielde0
- Direction
- maximizede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A seeding rate of 6 kg ha −1 maximized seed yield for both hybrid and conventional summer rape cultivars.”
The same questions in other papers
density · physiology: pigments · Brassica napus (oilseed rape)Results agree
2 papers in the same direction as this paper
- no effect
- negative
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.