Abstract
Ammonium-nitrate (NH4NO3) double enriched with the 15N isotope (1.5 atom %) was used to evaluate fertilizer N recovery, N partitioning, and aboveground N status in container-grown common hackberry (Celtis occidentalis L.) trees back-filled with native soil at Arlington, Wisconsin and Lisle, Illinois, U.S. Treatments consisted of 0, 1.42 g N tree-1 (0.05 oz) and 4.27 g N tree-1 (0.15 oz), the area equivalent of 0, 0.49, and 1.47 kg N 100 m-2 (0, 1, and 3 lb N 1000 ft-2). Trees were harvested 14, 30, 60, and 90 days after fertilization. Fertilizer-induced changes in aboveground N status were significant only at the 4.27 g N tree-1 (0.15 oz) treatment level. The amount of fertilizer N recovered in aboveground tissues increased with rate of application. Fertilizer N was preferentially partitioned to foliage and current season stem wood. The percentage of fertilizer recovered in aboveground tissues did not differ between the application rates, ranging from 15%–25% at Arlington, WI, and 5%–9% at Lisle, IL. Frost damage to the foliage at Lisle, IL may have resulted in location differences in aboveground biomass which affected fertilizer N uptake and recovery. These data suggest fertilizer N accumulated in nontarget sinks and/or were lost from the site of application at both rates of application.
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Claims 8
Claim · model-written summary
Fertilizer-induced changes in aboveground N status of container-grown hackberry trees were significant only at the 4.27 g N tree-1 treatment.
- Taxon
- Common Hackberry (Celtis occidentalis)
Celtis occidentalist0 - Treatment
- 4.27 g N tree-1 (0.15 oz)e0
- Outcome
- aboveground N statuse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Common Hackberry (Celtis occidentalis)”
e0“Fertilizer-induced changes in aboveground N status were significant only at the 4.27 g N tree-1 (0.15 oz) treatment level”
Claim · model-written summary
The amount of fertilizer N recovered in aboveground tissues of hackberry trees increased with the rate of fertilizer application.
- Taxon
- Common Hackberry (Celtis occidentalis)Celtis occidentalist0
- Treatment
- rate of applicatione0
- Outcome
- amount of fertilizer N recovered in aboveground tissuese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Common Hackberry (Celtis occidentalis)”
e0“The amount of fertilizer N recovered in aboveground tissues increased with rate of application”
Claim · model-written summary
Fertilizer N was preferentially partitioned to foliage and current season stem wood in hackberry trees.
- Taxon
- Common Hackberry (Celtis occidentalis)Celtis occidentalist0
- Organ / stage
- foliage and current season stem woode0
- Outcome
- Fertilizer N was preferentially partitionede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Common Hackberry (Celtis occidentalis)”
e0“Fertilizer N was preferentially partitioned to foliage and current season stem wood”
Claim · model-written summary
The percentage of fertilizer N recovered in aboveground tissues did not differ between the two application rates.
- Taxon
- Common Hackberry (Celtis occidentalis)Celtis occidentalist0
- Treatment
- application ratese0
- Outcome
- percentage of fertilizer recovered in aboveground tissuese0
- Direction
- did not differe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Common Hackberry (Celtis occidentalis)”
e0“The percentage of fertilizer recovered in aboveground tissues did not differ between the application rates”
Claim · model-written summary
At Arlington, Wisconsin, 15%-25% of the fertilizer was recovered in aboveground tissues.
- Taxon
- Common Hackberry (Celtis occidentalis)Celtis occidentalist0
- Outcome
- percentage of fertilizer recovered in aboveground tissuese0
- Value
- 15%–25%e1
- Setting
- Arlington, WIe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Common Hackberry (Celtis occidentalis)”
e0“The percentage of fertilizer recovered in aboveground tissues”
e1“15%–25% at Arlington, WI”
Claim · model-written summary
At Lisle, Illinois, 5%-9% of the fertilizer was recovered in aboveground tissues.
- Taxon
- Common Hackberry (Celtis occidentalis)Celtis occidentalist0
- Outcome
- percentage of fertilizer recovered in aboveground tissuese0
- Value
- 5%–9%e1
- Setting
- Lisle, ILe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Common Hackberry (Celtis occidentalis)”
e0“The percentage of fertilizer recovered in aboveground tissues”
e1“5%–9% at Lisle, IL”
Claim · model-written summary
Frost damage to the foliage at Lisle may have caused location differences in aboveground biomass that affected fertilizer N uptake and recovery.
- Taxon
- Common Hackberry (Celtis occidentalis)Celtis occidentalist0
- Outcome
- fertilizer N uptake and recoverye0
- Qualifier
- Frost damage to the foliagee0
- Setting
- Lisle, ILe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Common Hackberry (Celtis occidentalis)”
e0“Frost damage to the foliage at Lisle, IL may have resulted in location differences in aboveground biomass which affected fertilizer N uptake and recovery”
Claim · model-written summary
Fertilizer N accumulated in nontarget sinks and/or was lost from the site of application at both application rates.
- Taxon
- Common Hackberry (Celtis occidentalis)Celtis occidentalist0
- Outcome
- fertilizer N accumulated in nontarget sinkse0
- Qualifier
- lost from the site of applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Common Hackberry (Celtis occidentalis)”
e0“fertilizer N accumulated in nontarget sinks and/or were lost from the site of application at both rates of application”