Abstract
Abstract The field experiments conducted on the grey‐brown podzolic soil in the four growing seasons (1998–2001) at Krzeslice Farm, central‐western Poland comprised seven fertilization variants: 80 NF + 80 CAN ; 80 CAN + 80 CAN ; 80 AN + 80 AN ; 80 NF + 50 CAN + 30 CN ; 80 CAN + 50 CAN +30 CN ; 80 AN + 50 AN + 30 CN (where NF – nitrofos NPK; CAN – calcium‐ammonium nitrate; AN – ammonium nitrate; CN – calcium nitrate) and control (without N) applied in split rates at the beginning of spring regrowth (80 kg N ha −1 ), stem elongation (80 or 50) and flower buds visible stages (30). The yielding effect of tested fertilization variants was significant in comparison with the control (2.24 t ha −1 ). The highest mean seed yield (3.64 t ha −1 ) was collected from 80 AN + 80 AN and 80 CAN + 80 CAN variants. Mean values of 4 years indicate that the second N rate division (80 + 50 + 30) decreased yield, although not significantly in comparison with these two N treatments. Plants grown on these treatments have developed different patterns of growth to yield the seeds. These patterns were characterized by very high crop growth rate during flowering (above 21 g m −2 day −1 ) and negative at maturation (down to −2.5 g m −2 day −1 ). Plants fertilized with ammonium nitrate (80 AN + 80 AN ) reached maximum growth rate earlier (65 days), which lasted longer (20 days) than plants fertilized with calcium‐ammonium nitrate (71 days lasting 17.5 days). Plants grown on the control treatment reached the highest crop growth rate within 79 days (14.8 g m −2 day −1 ), which lasted 15 days.
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Claims 11
Claim · model-written summary
Tested fertilization significantly affected seed yield relative to the unfertilized control at 2.24 t ha −1.
- Taxon
- Brassica napus L.
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- tested fertilization variantse0
- Outcome
- yielding effecte0
- Qualifier
- 2.24 t ha −1e0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“The yielding effect of tested fertilization variants was significant in comparison with the control (2.24 t ha −1 )”
t0“Brassica napus L.”
Claim · model-written summary
80 AN + 80 AN produced highest mean seed yield of 3.64 t ha −1.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- 80 AN + 80 ANe0
- Outcome
- mean seed yielde0
- Direction
- higheste0
- Value
- 3.64 t ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest mean seed yield (3.64 t ha −1 ) was collected from 80 AN + 80 AN and 80 CAN + 80 CAN variants”
t0“Brassica napus L.”
Claim · model-written summary
80 CAN + 80 CAN produced highest mean seed yield of 3.64 t ha −1.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- 80 CAN + 80 CANe0
- Outcome
- mean seed yielde0
- Direction
- higheste0
- Value
- 3.64 t ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest mean seed yield (3.64 t ha −1 ) was collected from 80 AN + 80 AN and 80 CAN + 80 CAN variants”
t0“Brassica napus L.”
Claim · model-written summary
Splitting nitrogen 80 + 50 + 30 decreased four-year yield nonsignificantly relative to the two highest-yield treatments.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- 80 + 50 + 30e0
- Outcome
- yielde0
- Direction
- decreasede0
- Qualifier
- Mean values of 4 yearse0
- Comparator
- these two N treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mean values of 4 years indicate that the second N rate division (80 + 50 + 30) decreased yield, although not significantly in comparison with these two N treatments”
t0“Brassica napus L.”
Claim · model-written summary
High-yield treatments showed flowering growth rates above 21 g m −2 day −1.
- Taxon
- Brassica napus L.Brassica napust0
- Organ / stage
- floweringe0
- Outcome
- crop growth ratee0
- Direction
- very highe0
- Value
- above 21 g m −2 day −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These patterns were characterized by very high crop growth rate during flowering (above 21 g m −2 day −1 )”
t0“Brassica napus L.”
Claim · model-written summary
Growth rates became negative at maturation, down to −2.5 g m −2 day −1.
- Taxon
- Brassica napus L.Brassica napust0
- Organ / stage
- maturatione0
- Outcome
- negative at maturatione0
- Direction
- down toe0
- Value
- −2.5 g m −2 day −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“negative at maturation (down to −2.5 g m −2 day −1 )”
t0“Brassica napus L.”
Claim · model-written summary
Ammonium nitrate plants reached maximum growth earlier at 65 days versus calcium-ammonium nitrate at 71 days.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- ammonium nitrate (80 AN + 80 AN )e0
- Outcome
- maximum growth ratee0
- Direction
- earliere0
- Value
- 65 dayse0
- Qualifier
- 71 dayse0
- Comparator
- calcium‐ammonium nitratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants fertilized with ammonium nitrate (80 AN + 80 AN ) reached maximum growth rate earlier (65 days), which lasted longer (20 days) than plants fertilized with calcium‐ammonium nitrate (71 days lasting 17.5 days)”
t0“Brassica napus L.”
Claim · model-written summary
Maximum growth lasted longer with ammonium nitrate, 20 days versus 17.5 days.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- ammonium nitrate (80 AN + 80 AN )e0
- Outcome
- maximum growth ratee0
- Direction
- longere0
- Value
- 20 dayse0
- Qualifier
- 17.5 dayse0
- Comparator
- calcium‐ammonium nitratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants fertilized with ammonium nitrate (80 AN + 80 AN ) reached maximum growth rate earlier (65 days), which lasted longer (20 days) than plants fertilized with calcium‐ammonium nitrate (71 days lasting 17.5 days)”
t0“Brassica napus L.”
Claim · model-written summary
Control plants attained their peak growth rate within 79 days.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- control treatmente0
- Outcome
- highest crop growth ratee0
- Direction
- higheste0
- Value
- 79 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants grown on the control treatment reached the highest crop growth rate within 79 days (14.8 g m −2 day −1 ), which lasted 15 days”
t0“Brassica napus L.”
Claim · model-written summary
Control peak crop growth rate was 14.8 g m −2 day −1.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- control treatmente0
- Outcome
- crop growth ratee0
- Direction
- higheste0
- Value
- 14.8 g m −2 day −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants grown on the control treatment reached the highest crop growth rate within 79 days (14.8 g m −2 day −1 ), which lasted 15 days”
t0“Brassica napus L.”
Claim · model-written summary
Control peak growth lasted 15 days.
- Taxon
- Brassica napus L.Brassica napust0
- Treatment
- control treatmente0
- Outcome
- highest crop growth ratee0
- Value
- 15 dayse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants grown on the control treatment reached the highest crop growth rate within 79 days (14.8 g m −2 day −1 ), which lasted 15 days”
t0“Brassica napus L.”
The same questions in other papers
fertilization · yield · Brassica napus (oilseed rape)Positive and negative results
336 papers in the same direction as this paper · 37 in the opposite direction · 4 reporting no difference from an alternative
- positive
- positive
- positive
374 papers more in this group
See all 378 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.