Abstract
In this study, the yield and yield components were studied using a conventional variety Zhongshuang 11 (ZS 11) and a hybrid variety Zhongyouza 12 (ZYZ 12) at varying plant densities. The increase in plant density led to an initial increase in seed yield and pod numbers per unit area, followed by a decrease. The optimal plant density was 58.5 × 10 4 plants ha −1 in both ZS 11 and ZYZ 12. The further researches on physiological traits showed a rapid decrease in the green leaf area index (GLAI) and chlorophyll content and a remarkable increase in malondialdehyde content in high plant density (HPD) population than did the low plant density (LPD) population, which indicated the rapid leaf senescence. However, HPD had higher values in terms of pod area index (PAI), pod photosynthesis, and radiation use efficiency (RUE) after peak anthesis. A significantly higher level of dry matter accumulation and nitrogen utilization efficiency were observed, which resulted in higher yield. HPD resulted in a rapid decrease in root morphological parameters (root length, root tips, root surface area, and root volume). These results suggested that increasing the plant density within a certain range was a promising option for high seed yield in winter rapeseed in China.
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Claims 17
Claim · model-written summary
Increasing density first increased and then decreased seed yield.
- Taxon
- Winter Oilseed Rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- increase in plant densitye0
- Outcome
- seed yielde0
- Direction
- initial increasee0
- Qualifier
- followed by a decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“The increase in plant density led to an initial increase in seed yield and pod numbers per unit area, followed by a decrease”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
Increasing density first increased and then decreased pod numbers per unit area.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Treatment
- increase in plant densitye0
- Outcome
- pod numbers per unit areae0
- Direction
- initial increasee0
- Qualifier
- followed by a decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in plant density led to an initial increase in seed yield and pod numbers per unit area, followed by a decrease”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
The optimal density was 58.5 × 10 4 plants ha −1 for both varieties.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Material
- ZS 11 and ZYZ 12e0
- Outcome
- optimal plant densitye0
- Value
- 58.5 × 10 4 plants ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimal plant density was 58.5 × 10 4 plants ha −1 in both ZS 11 and ZYZ 12”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High plant density produced a decrease in green leaf area index relative to low density.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Treatment
- high plant density (HPD)e0
- Outcome
- green leaf area indexe0
- Direction
- decreasee0
- Comparator
- low plant density (LPD)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a rapid decrease in the green leaf area index (GLAI) and chlorophyll content and a remarkable increase in malondialdehyde content in high plant density (HPD) population than did the low plant density (LPD) population”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High plant density produced a decrease in chlorophyll content relative to low density.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Treatment
- high plant density (HPD)e0
- Outcome
- chlorophyll contente0
- Direction
- decreasee0
- Comparator
- low plant density (LPD)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a rapid decrease in the green leaf area index (GLAI) and chlorophyll content and a remarkable increase in malondialdehyde content in high plant density (HPD) population than did the low plant density (LPD) population”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High plant density produced a increase in malondialdehyde content relative to low density.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Treatment
- high plant density (HPD)e0
- Outcome
- malondialdehyde contente0
- Direction
- increasee0
- Comparator
- low plant density (LPD)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a rapid decrease in the green leaf area index (GLAI) and chlorophyll content and a remarkable increase in malondialdehyde content in high plant density (HPD) population than did the low plant density (LPD) population”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High density had higher pod area index (PAI) after peak anthesis.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Treatment
- HPDe0
- Outcome
- pod area index (PAI)e0
- Direction
- highere0
- Qualifier
- after peak anthesise0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HPD had higher values in terms of pod area index (PAI), pod photosynthesis, and radiation use efficiency (RUE) after peak anthesis”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High density had higher pod photosynthesis after peak anthesis.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Treatment
- HPDe0
- Outcome
- pod photosynthesise0
- Direction
- highere0
- Qualifier
- after peak anthesise0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HPD had higher values in terms of pod area index (PAI), pod photosynthesis, and radiation use efficiency (RUE) after peak anthesis”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High density had higher radiation use efficiency (RUE) after peak anthesis.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Treatment
- HPDe0
- Outcome
- radiation use efficiency (RUE)e0
- Direction
- highere0
- Qualifier
- after peak anthesise0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HPD had higher values in terms of pod area index (PAI), pod photosynthesis, and radiation use efficiency (RUE) after peak anthesis”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High density was associated with higher dry matter accumulation.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Outcome
- dry matter accumulatione0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significantly higher level of dry matter accumulation and nitrogen utilization efficiency were observed, which resulted in higher yield”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High density was associated with higher nitrogen utilization efficiency.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Outcome
- nitrogen utilization efficiencye0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significantly higher level of dry matter accumulation and nitrogen utilization efficiency were observed, which resulted in higher yield”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High density was associated with higher yield.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Outcome
- yielde0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significantly higher level of dry matter accumulation and nitrogen utilization efficiency were observed, which resulted in higher yield”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High density decreased root length.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Treatment
- HPDe0
- Outcome
- root lengthe0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HPD resulted in a rapid decrease in root morphological parameters (root length, root tips, root surface area, and root volume)”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High density decreased root tips.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Treatment
- HPDe0
- Outcome
- root tipse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HPD resulted in a rapid decrease in root morphological parameters (root length, root tips, root surface area, and root volume)”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High density decreased root surface area.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Treatment
- HPDe0
- Outcome
- root surface areae0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HPD resulted in a rapid decrease in root morphological parameters (root length, root tips, root surface area, and root volume)”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
High density decreased root volume.
- Taxon
- Winter Oilseed RapeBrassica napust0
- Treatment
- HPDe0
- Outcome
- root volumee0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HPD resulted in a rapid decrease in root morphological parameters (root length, root tips, root surface area, and root volume)”
t0“Winter Oilseed Rape (Brassica napus L.)”
Claim · model-written summary
The authors recommend increasing density within a certain range for high seed yield.
Verbatim
e0“increasing the plant density within a certain range was a promising option for high seed yield in winter rapeseed in China”
The same questions in other papers
density · growth · Brassica napus (oilseed rape)Positive and negative results
15 papers in the same direction as this paper · 9 in the opposite direction
- no effect
- negative
- positive
21 papers more in this group
See all 25 papers →density · physiology: photosynthesis · Brassica napus (oilseed rape)Results agree
1 paper in the same direction as this paper
- positive
density · physiology: pigments · Brassica napus (oilseed rape)Results agree
2 papers in the same direction as this paper
- no effect
- no effect
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.