Abstract
Full exploitation of the potential of new varieties requires research, whose aim is to adapt the technology to their needs. A two-factor experiment evaluated the effect of row spacing (33, 44, and 55 cm) of three oilseed rape (OSR) varieties (conventional, hybrid, and "semi-dwarf" hybrid variety) on canopy area index (CAI) and yield components. At higher row spacing, OSR plants were characterized by a strong increase in the CAI at successive growth stages; thereby, the incomplete use of production area was compensated at the pod development stage. The differences in the CAI between row spacings were significant until the end of flowering, whereas differences in the CAI between varieties were significant until the flower bud development stage. In the next development phases, CAI of OSR plants was at a similar level to all plots. However, the statistical analysis showed a declining trend in seed yield and yield biomass (pods and straw weight) with increasing row spacing. A positive aspect of increased row spacing was a decrease in glucosinolates content in seeds. The differences in fat content were statistically insignificant. The hybrid varieties of OSR produced the highest seed yield at a row spacing of 33 cm, while the conventional – at a row spacing of 44 cm. These relationships are confirmed by high positive correlations of seed weight and pod weight per unit area with CAI. The results have important practical aspect, because it shows that it is possible to reduce the number of OSR plants per unit area, thereby reducing demand for expensive certified seeds for sowing but to certain limits. Too small plant density binds to the risk of decreased seed yield. It may be justified, e.g., in extensive or organic farming where wide row creates the possibility of mechanical weed control.
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Claims 12
Claim · model-written summary
At higher row spacing, oilseed rape plants showed a strong increase in canopy area index at successive growth stages.
- Taxon
- oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- higher row spacinge1
- Outcome
- CAIe1
- Direction
- strong increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
t0“oilseed rape”
e1“At higher row spacing, OSR plants were characterized by a strong increase in the CAI at successive growth stages”
Claim · model-written summary
Differences in canopy area index between row spacings were significant until the end of flowering.
- Taxon
- oilseed rapeBrassica napust0
- Treatment
- row spacingse1
- Outcome
- differences in the CAIe1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“oilseed rape”
e1“The differences in the CAI between row spacings were significant until the end of flowering”
Claim · model-written summary
Differences in canopy area index between varieties were significant until the flower bud development stage.
- Taxon
- oilseed rapeBrassica napust0
- Material
- varietiese1
- Outcome
- differences in the CAIe1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“oilseed rape”
e1“differences in the CAI between varieties were significant until the flower bud development stage”
Claim · model-written summary
In later development phases, canopy area index of oilseed rape plants was at a similar level in all plots.
- Taxon
- oilseed rapeBrassica napust0
- Outcome
- CAI of OSR plants was at a similar level to all plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“oilseed rape”
e1“In the next development phases, CAI of OSR plants was at a similar level to all plots”
Claim · model-written summary
Seed yield and yield biomass (pods and straw weight) showed a declining trend with increasing row spacing.
- Taxon
- oilseed rapeBrassica napust0
- Treatment
- increasing row spacinge1
- Outcome
- seed yield and yield biomasse1
- Direction
- declining trende1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“oilseed rape”
e1“the statistical analysis showed a declining trend in seed yield and yield biomass (pods and straw weight) with increasing row spacing”
Claim · model-written summary
Increased row spacing decreased glucosinolates content in seeds, which the authors consider a positive aspect.
- Taxon
- oilseed rapeBrassica napust0
- Organ / stage
- seedse1
- Treatment
- increased row spacinge1
- Outcome
- glucosinolates contente1
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“oilseed rape”
e1“A positive aspect of increased row spacing was a decrease in glucosinolates content in seeds”
Claim · model-written summary
Differences in fat content were statistically insignificant.
- Taxon
- oilseed rapeBrassica napust0
- Outcome
- fat contente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“oilseed rape”
e1“The differences in fat content were statistically insignificant”
Claim · model-written summary
Hybrid oilseed rape varieties produced the highest seed yield at a row spacing of 33 cm.
- Taxon
- oilseed rapeBrassica napust0
- Material
- hybrid varietiese1
- Outcome
- highest seed yielde1
- Value
- 33 cme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“oilseed rape”
e1“The hybrid varieties of OSR produced the highest seed yield at a row spacing of 33 cm, while the conventional – at a row spacing of 44 cm”
Claim · model-written summary
The conventional oilseed rape variety produced the highest seed yield at a row spacing of 44 cm.
- Taxon
- oilseed rapeBrassica napust0
- Material
- conventionale1
- Outcome
- highest seed yielde1
- Value
- 44 cme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“oilseed rape”
e1“The hybrid varieties of OSR produced the highest seed yield at a row spacing of 33 cm, while the conventional – at a row spacing of 44 cm”
Claim · model-written summary
Seed weight and pod weight per unit area were highly positively correlated with canopy area index.
- Taxon
- oilseed rapeBrassica napust0
- Outcome
- seed weight and pod weight per unit areae1
- Direction
- positive correlationse1
- Comparator
- CAIe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“oilseed rape”
e1“high positive correlations of seed weight and pod weight per unit area with CAI”
Claim · model-written summary
The authors conclude that the number of OSR plants per unit area can be reduced, lowering demand for certified seed, but only to certain limits.
- Taxon
- oilseed rapeBrassica napust0
- Outcome
- reduce the number of OSR plants per unit areae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“oilseed rape”
e1“it is possible to reduce the number of OSR plants per unit area, thereby reducing demand for expensive certified seeds for sowing but to certain limits”
Claim · model-written summary
Too small a plant density carries a risk of decreased seed yield.
- Taxon
- oilseed rapeBrassica napust0
- Treatment
- Too small plant densitye1
- Outcome
- seed yielde1
- Direction
- decreasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“oilseed rape”
e1“Too small plant density binds to the risk of decreased seed yield”
The same questions in other papers
density · quality: phytochemicals · Brassica napus (oilseed rape)Positive and negative results
1 in the opposite direction
- no effect
density · yield · Brassica napus (oilseed rape)Positive and negative results
31 papers in the same direction as this paper · 54 in the opposite direction
- positive
- negative
- no effect
82 papers more in this group
See all 86 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.