Abstract
The understanding of plant nutrient uptake and dynamics is a necessary step to develop site-specific, economically viable, and environmentally responsible management practices. A field study on canola (Brassica napus L.), treated with preplant and sidedress nitrogen (N) applications under ample phosphorus (P) supply conditions, was conducted to determine seasonal plant dry matter (DM) and N and P uptake patterns. We found that periodic DM measured at 20% flowering (FL), from FL to 50% pods reaching maximum size (FL-RI), and from RI to physiological maturity (RI-PM) contributed to 30%, 57%, and 14% of total DM, respectively. Yields ranged from 111 to 447 g m −2 with a sharp decline in 2012 induced by heat and drought. The crop took up about 58%–71% of total plant N by FL, whereas up to 42% of total plant P was assembled during the RI-PM. Canola seed accounted for 60%–66% of total plant N and 59%–63% of total plant P. Accumulation of DM and N post-FL, and of P during RI-PM could explain 69%, 43%, and 55%, respectively, variations in yield, seed N, and seed P. Our data indicated that plant P uptake under adequate P supply conditions in canola was largely enhanced by N application.
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Claims 13
Claim · model-written summary
Periodic dry matter measured at 20% flowering contributed 30% of total dry matter in canola.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napuse6 - Outcome
- periodic DM measured at 20% flowering (FL)e0
- Value
- 30%e0
- Setting
- field studye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e6“A field study on canola (Brassica napus L.)”
e0“periodic DM measured at 20% flowering (FL), from FL to 50% pods reaching maximum size (FL-RI), and from RI to physiological maturity (RI-PM) contributed to 30%, 57%, and 14% of total DM, respectively”
Claim · model-written summary
Dry matter from flowering to 50% pods reaching maximum size contributed 57% of total dry matter in canola.
- Taxon
- canolaBrassica napus var. napuse6
- Outcome
- from FL to 50% pods reaching maximum size (FL-RI)e0
- Value
- 57%e0
- Setting
- field studye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A field study on canola (Brassica napus L.)”
e0“periodic DM measured at 20% flowering (FL), from FL to 50% pods reaching maximum size (FL-RI), and from RI to physiological maturity (RI-PM) contributed to 30%, 57%, and 14% of total DM, respectively”
Claim · model-written summary
Dry matter from physiological maturity onwards contributed 14% of total dry matter in canola.
- Taxon
- canolaBrassica napus var. napuse6
- Outcome
- from RI to physiological maturity (RI-PM)e0
- Value
- 14%e0
- Setting
- field studye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A field study on canola (Brassica napus L.)”
e0“periodic DM measured at 20% flowering (FL), from FL to 50% pods reaching maximum size (FL-RI), and from RI to physiological maturity (RI-PM) contributed to 30%, 57%, and 14% of total DM, respectively”
Claim · model-written summary
Canola yields ranged from 111 to 447 g m−2 across seasons.
- Taxon
- canolaBrassica napus var. napuse6
- Outcome
- Yieldse1
- Value
- 111 to 447 g m −2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A field study on canola (Brassica napus L.)”
e1“Yields ranged from 111 to 447 g m −2 with a sharp decline in 2012 induced by heat and drought”
Claim · model-written summary
Canola yield declined sharply in 2012, induced by heat and drought.
- Taxon
- canolaBrassica napus var. napuse6
- Treatment
- heat and droughte1
- Outcome
- Yieldse1
- Direction
- sharp declinee1
- Qualifier
- in 2012e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A field study on canola (Brassica napus L.)”
e1“Yields ranged from 111 to 447 g m −2 with a sharp decline in 2012 induced by heat and drought”
Claim · model-written summary
Canola took up about 58%–71% of total plant N by flowering.
- Taxon
- canolaBrassica napus var. napuse6
- Outcome
- total plant Ne2
- Value
- 58%–71%e2
- Qualifier
- by FLe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A field study on canola (Brassica napus L.)”
e2“The crop took up about 58%–71% of total plant N by FL, whereas up to 42% of total plant P was assembled during the RI-PM”
Claim · model-written summary
Up to 42% of total plant P was assembled in canola during the RI-PM.
- Taxon
- canolaBrassica napus var. napuse6
- Outcome
- total plant Pe2
- Value
- 42%e2
- Qualifier
- during the RI-PMe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A field study on canola (Brassica napus L.)”
e2“The crop took up about 58%–71% of total plant N by FL, whereas up to 42% of total plant P was assembled during the RI-PM”
Claim · model-written summary
Canola seed accounted for 60%–66% of total plant N.
- Taxon
- canolaBrassica napus var. napuse6
- Organ / stage
- seede3
- Outcome
- Canola seede3
- Value
- 60%–66%e3
- Qualifier
- of total plant Ne3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A field study on canola (Brassica napus L.)”
e3“Canola seed accounted for 60%–66% of total plant N and 59%–63% of total plant P”
Claim · model-written summary
Canola seed accounted for 59%–63% of total plant P.
- Taxon
- canolaBrassica napus var. napuse6
- Organ / stage
- seede3
- Outcome
- Canola seede3
- Value
- 59%–63%e3
- Qualifier
- of total plant Pe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A field study on canola (Brassica napus L.)”
e3“Canola seed accounted for 60%–66% of total plant N and 59%–63% of total plant P”
Claim · model-written summary
Accumulation of dry matter and N after flowering could explain 69% of the variation in canola yield.
- Taxon
- canolaBrassica napus var. napuse6
- Treatment
- Accumulation of DM and N post-FLe4
- Outcome
- variations in yielde4
- Value
- 69%e4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A field study on canola (Brassica napus L.)”
e4“Accumulation of DM and N post-FL, and of P during RI-PM could explain 69%, 43%, and 55%, respectively, variations in yield, seed N, and seed P”
Claim · model-written summary
Accumulation of P during RI-PM could explain 55% of the variation in canola seed P.
- Taxon
- canolaBrassica napus var. napuse6
- Treatment
- of P during RI-PMe4
- Outcome
- seed Pe4
- Value
- 55%e4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A field study on canola (Brassica napus L.)”
e4“Accumulation of DM and N post-FL, and of P during RI-PM could explain 69%, 43%, and 55%, respectively, variations in yield, seed N, and seed P”
Claim · model-written summary
Accumulation of DM and N after flowering could explain 43% of the variation in canola seed N.
- Taxon
- canolaBrassica napus var. napuse6
- Treatment
- Accumulation of DM and N post-FLe4
- Outcome
- seed Ne4
- Value
- 43%e4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A field study on canola (Brassica napus L.)”
e4“Accumulation of DM and N post-FL, and of P during RI-PM could explain 69%, 43%, and 55%, respectively, variations in yield, seed N, and seed P”
Claim · model-written summary
Plant P uptake under adequate P supply in canola was largely enhanced by N application.
- Taxon
- canolaBrassica napus var. napuse6
- Treatment
- N applicatione5
- Outcome
- plant P uptakee5
- Direction
- enhancede5
- Qualifier
- under adequate P supply conditionse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A field study on canola (Brassica napus L.)”
e5“Our data indicated that plant P uptake under adequate P supply conditions in canola was largely enhanced by N application”
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See all 55 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.