Abstract
Distribution of leaf nitrogen with respect to leaf mass per unit area (M(a)), nitrogen per unit mass (N(m)) and nitrogen per unit area (N(a)) within peach (Prunus persica L.) tree canopies was studied in two field experiments. In one experiment, leaf light exposure and M(a) were measured on leaves from different canopy positions of peach trees subjected to five nitrogen (N) fertilization treatments. Leaf light exposure and M(a) were linearly related and the relationship was independent of N fertilization. In a subsequent experiment, N fertilizer was applied to previously unfertilized trees in midsummer, after shoot growth had terminated. Application of N fertilizer did not affect mean canopy M(a). Fertilization increased N(m) of all leaves throughout the canopy compared with non-fertilized trees. No significant relationship between N(m) and M(a) was found in either fertilized or control trees. There was a linear relationship between N(a) and M(a) and the slope of the relationship was increased by N fertilizer application. We conclude that distribution of N(a) in peach tree canopies is primarily a function of M(a) partitioning with light and N(m), which is related to soil N availability.
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Claims 7
Claim · model-written summary
Leaf light exposure and leaf mass per unit area were linearly related in peach canopies, and this relation did not depend on N fertilization.
- Taxon
- peach (Prunus persica L.)
Prunus persicae0 - Treatment
- N fertilizatione1
- Outcome
- Leaf light exposure and M(a)e1
- Qualifier
- the relationship was independent of N fertilizatione1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“within peach (Prunus persica L.) tree canopies was studied in two field experiments”
e1“Leaf light exposure and M(a) were linearly related and the relationship was independent of N fertilization”
Claim · model-written summary
Application of N fertilizer did not affect mean canopy M(a) of previously unfertilized peach trees.
- Taxon
- peach (Prunus persica L.)Prunus persicae0
- Treatment
- Application of N fertilizere1
- Outcome
- mean canopy M(a)e1
- Direction
- did not affecte1
- Comparator
- previously unfertilized treese2
- Setting
- field experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“within peach (Prunus persica L.) tree canopies was studied in two field experiments”
e1“Application of N fertilizer did not affect mean canopy M(a)”
e2“N fertilizer was applied to previously unfertilized trees in midsummer”
Claim · model-written summary
Fertilization increased N(m) of all leaves throughout the canopy compared with non-fertilized peach trees.
- Taxon
- peach (Prunus persica L.)Prunus persicae0
- Organ / stage
- leavese1
- Treatment
- Fertilizatione1
- Outcome
- N(m)e1
- Direction
- increasede1
- Comparator
- non-fertilized treese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“within peach (Prunus persica L.) tree canopies was studied in two field experiments”
e1“Fertilization increased N(m) of all leaves throughout the canopy compared with non-fertilized trees”
Claim · model-written summary
No significant relationship between N(m) and M(a) was found in fertilized or control peach trees.
- Taxon
- peach (Prunus persica L.)Prunus persicae0
- Treatment
- fertilized or control treese1
- Outcome
- relationship between N(m) and M(a)e1
- Direction
- no_changeinferrede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“within peach (Prunus persica L.) tree canopies was studied in two field experiments”
e1“No significant relationship between N(m) and M(a) was found in either fertilized or control trees”
Claim · model-written summary
There is a linear relationship between N(a) and M(a) in peach canopies in the field experiments.
- Taxon
- peach (Prunus persica L.)Prunus persicae0
- Outcome
- linear relationship between N(a) and M(a)e1
- Setting
- field experimentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“within peach (Prunus persica L.) tree canopies was studied in two field experiments”
e1“There was a linear relationship between N(a) and M(a)”
Claim · model-written summary
N fertilizer application increased the slope of the N(a) and M(a) relationship in peach trees compared with previously unfertilized trees.
- Taxon
- peach (Prunus persica L.)Prunus persicae0
- Treatment
- N fertilizer applicatione1
- Outcome
- slope of the relationshipe1
- Direction
- increasede1
- Comparator
- previously unfertilized treese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“within peach (Prunus persica L.) tree canopies was studied in two field experiments”
e1“the slope of the relationship was increased by N fertilizer application”
e2“N fertilizer was applied to previously unfertilized trees in midsummer”
Claim · model-written summary
Distribution of N(a) in peach tree canopies is primarily a function of M(a) partitioning with light and N(m), which is related to soil N availability.
- Taxon
- peach (Prunus persica L.)Prunus persicae0
- Outcome
- distribution of N(a)e1
- Qualifier
- M(a) partitioning with light and N(m), which is related to soil N availabilitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“within peach (Prunus persica L.) tree canopies was studied in two field experiments”
e1“We conclude that distribution of N(a) in peach tree canopies is primarily a function of M(a) partitioning with light and N(m), which is related to soil N availability”
The same questions in other papers
nitrogen · growth · Prunus persica (peach)Positive and negative results
3 papers in the same direction as this paper · 22 in the opposite direction
- positive
- positive
- positive
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See all 26 papers →fertilization · growth · Prunus persica (peach)Positive and negative results
2 papers in the same direction as this paper · 33 in the opposite direction
- positive
- positive
- positive
32 papers more in this group
See all 36 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.