Abstract
There are few growth studies evaluating within‐season effects of N on vegetative growth and N accumulation of tomato ( Lycopersicon esculentum Mill.). Growth analysis of field‐grown tomato for a number of Florida locations and management systems is presented here. Severe N stress resulted in fewer and smaller, but thicker, leaves. With increasing N, average leaf area index (LAI) increased from ≈0.75 to ≈3, but radiation use efficiency (RUE) typically increased less then 30%. Lower RUE under N‐limited conditions reflected a decrease in N concentration of the most recently matured leaves from 40 mg g −1 to as little as 15 mg g −1 . Over the life of well‐fertilized crops, leaf N concentrations dropped from 55 to 65 mg g −1 during initial growth to 20 to 35 mg g −1 at final harvest. Corresponding N concentrations for fruit and for stems were 30 to 35 mg g −1 and 15 to 25 mg g −1 . Severe N stress affected leaf and stem N concentrations most drastically, whereas N in fruits was less variable. With lower N supply (N < 180 kg ha −1 ) under careful management, nitrogen use efficiency (NUE) for field‐grown tomato was ≈0.4 Mg fresh fruit (kg N) −1 and average crop N accumulation increased from 37 to 210 kg N ha −1 as N fertilization increased from 0 to 333 kg N ha −1 . As a fraction of the fertilizer N applied N fertilizer recovery ranged from 0.36 to 0.74 and 0.61 to 0.96 for drip‐irrigated and subirrigated crops, respectively.
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Claims 12
Claim · model-written summary
Severe nitrogen stress produced fewer, smaller and thicker tomato leaves.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- Severe N stresse0
- Outcome
- fewer and smaller, but thicker, leavese0
- Direction
- fewer and smaller, but thickere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe N stress resulted in fewer and smaller, but thicker, leaves.”
t0“Field‐Grown Tomato”
Claim · model-written summary
Tomato leaf area index rose from about 0.75 to about 3 with increasing nitrogen.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- increasing Ne0
- Outcome
- average leaf area index (LAI)e0
- Direction
- increasede0
- Value
- ≈0.75 to ≈3e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing N, average leaf area index (LAI) increased from ≈0.75 to ≈3”
t0“Field‐Grown Tomato”
Claim · model-written summary
Tomato radiation use efficiency rose by less than 30% with increasing nitrogen.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Nitrogent0
- Outcome
- radiation use efficiency (RUE)e0
- Direction
- increasede0
- Value
- 30%e0
- Qualifier
- less then 30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but radiation use efficiency (RUE) typically increased less then 30%.”
t0“Nitrogen Stress Effects on Growth and Nitrogen Accumulation by Field‐Grown Tomato”
Claim · model-written summary
Nitrogen limited tomato leaves had lower nitrogen concentration, from 40 to as little as 15 mg per g.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- most recently matured leavese0
- Treatment
- N‐limited conditionse0
- Outcome
- N concentration of the most recently matured leavese0
- Direction
- decreasee0
- Value
- 40 mg g −1 to as little as 15 mg g −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower RUE under N‐limited conditions reflected a decrease in N concentration of the most recently matured leaves from 40 mg g −1 to as little as 15 mg g −1 .”
t0“Field‐Grown Tomato”
Claim · model-written summary
Well fertilized tomato leaf nitrogen concentration fell from 55–65 mg per g initially to 20–35 mg per g at harvest.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- leaf N concentrationse0
- Direction
- droppede0
- Value
- 55 to 65 mg g −1e0
- Qualifier
- 20 to 35 mg g −1 at final harveste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Over the life of well‐fertilized crops, leaf N concentrations dropped from 55 to 65 mg g −1 during initial growth to 20 to 35 mg g −1 at final harvest.”
t0“Field‐Grown Tomato”
Claim · model-written summary
Tomato fruit nitrogen concentration was 30–35 mg per g.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- fruite0
- Outcome
- N concentrations for fruite0
- Value
- 30 to 35 mg g −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corresponding N concentrations for fruit and for stems were 30 to 35 mg g −1 and 15 to 25 mg g −1 .”
t0“Field‐Grown Tomato”
Claim · model-written summary
Tomato stem nitrogen concentration was 15–25 mg per g.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- stemse0
- Outcome
- N concentrations for fruit and for stemse0
- Value
- 15 to 25 mg g −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corresponding N concentrations for fruit and for stems were 30 to 35 mg g −1 and 15 to 25 mg g −1 .”
t0“Field‐Grown Tomato”
Claim · model-written summary
Severe nitrogen stress affected tomato leaf and stem nitrogen concentrations most, while fruit nitrogen varied less.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Severe N stresse0
- Outcome
- leaf and stem N concentrationse0
- Direction
- most drasticallye0
- Qualifier
- N in fruits was less variablee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe N stress affected leaf and stem N concentrations most drastically, whereas N in fruits was less variable.”
t0“Field‐Grown Tomato”
Claim · model-written summary
Under nitrogen supply below 180 kg per hectare, tomato nitrogen use efficiency was about 0.4 Mg fresh fruit per kg nitrogen.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- nitrogen use efficiency (NUE)e0
- Value
- ≈0.4 Mg fresh fruit (kg N) −1e0
- Qualifier
- N < 180 kg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With lower N supply (N < 180 kg ha −1 ) under careful management, nitrogen use efficiency (NUE) for field‐grown tomato was ≈0.4 Mg fresh fruit (kg N) −1”
Claim · model-written summary
Tomato crop nitrogen accumulation rose from 37 to 210 kg nitrogen per hectare as fertilization rose from 0 to 333 kg nitrogen per hectare.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- N fertilizatione0
- Outcome
- average crop N accumulatione0
- Direction
- increasede0
- Value
- 37 to 210 kg N ha −1e0
- Qualifier
- 0 to 333 kg N ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“average crop N accumulation increased from 37 to 210 kg N ha −1 as N fertilization increased from 0 to 333 kg N ha −1 .”
t0“Field‐Grown Tomato”
Claim · model-written summary
Nitrogen fertilizer recovery in drip irrigated tomato was 0.36–0.74.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- drip‐irrigatede0
- Outcome
- N fertilizer recoverye0
- Value
- 0.36 to 0.74e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer recovery ranged from 0.36 to 0.74 and 0.61 to 0.96 for drip‐irrigated and subirrigated crops, respectively.”
t0“Field‐Grown Tomato”
Claim · model-written summary
Nitrogen fertilizer recovery in subirrigated tomato was 0.61–0.96.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- subirrigatede0
- Outcome
- N fertilizer recoverye0
- Value
- 0.61 to 0.96e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer recovery ranged from 0.36 to 0.74 and 0.61 to 0.96 for drip‐irrigated and subirrigated crops, respectively.”
t0“Field‐Grown Tomato”
The same questions in other papers
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See all 271 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.