Abstract
`Sunny' tomato (Lycopersicon esculentum Mill.) seedlings were pretransplant nutritionally conditioned (PNC) in 1988 and 1989 with factorial combinations of N from 100 to 300 mg·liter -1 and P from 10 to 70 mg·liter -1 . In 1988, all conditioned seedlings were exposed to 12 hours of 2C for eight consecutive nights before transplanting. In 1989, half of the conditioned plants were exposed to a low-temperature treatment of 8 days with 12-hour nights at 2C and 12-hour days in a warm greenhouse (19C/26C, night/day). In both years, as N PNC increased to 200 mg·liter -1 , seedling growth increased. Increasing P PNC from 10 to 40 mg·liter -1 increased seedling growth, but only in 1988. In both years, P PNC did not affect yields. Low-temperature exposure in 1989 decreased seedling growth in comparison to those held in a warm greenhouse (19C/26C, day/night). In 1988, first harvest yields were not affected by N PNC; however, in 1989, as N increased to 200 mg·liter -1 , early yields increased. In 1988, total yields increased wit h N PNC from 100 to 200 mg·liter -1 and in 1989 with N at 50 to 100 mg·liter -1 with no further increases from 100 to 200 mg·liter -1 . Low-temperature exposure had no effect on earliness, yield, or quality. A PNC regime combining at least 200 mg N/liter and up to 10 mg P/liter should be used to nutritionally condition `Sunny' tomato seedlings to enhance yield.
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Claims 10
Claim · model-written summary
Increasing N conditioning to 200 mg·liter -1 increased seedling growth in both years.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- N PNCe0
- Outcome
- seedling growthe0
- Direction
- increasede0
- Value
- 200 mg·liter -1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both years, as N PNC increased to 200 mg·liter -1 , seedling growth increased”
t0“Tomato”
Claim · model-written summary
Increasing P conditioning from 10 to 40 mg·liter -1 increased seedling growth only in 1988.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- P PNCe0
- Outcome
- seedling growthe0
- Direction
- increasede0
- Value
- 40 mg·liter -1e0
- Qualifier
- only in 1988e0
- Comparator
- 10e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing P PNC from 10 to 40 mg·liter -1 increased seedling growth, but only in 1988”
t0“Tomato”
Claim · model-written summary
P conditioning did not affect yield in either year.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- P PNCe0
- Outcome
- yieldse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both years, P PNC did not affect yields”
t0“Tomato”
Claim · model-written summary
Low temperature decreased seedling growth relative to a warm greenhouse in 1989.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Low-temperature exposuree0
- Outcome
- seedling growthe0
- Direction
- decreasede0
- Comparator
- those held in a warm greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low-temperature exposure in 1989 decreased seedling growth in comparison to those held in a warm greenhouse (19C/26C, day/night)”
t0“Tomato”
Claim · model-written summary
N conditioning did not affect first harvest yield in 1988.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- N PNCe0
- Outcome
- first harvest yieldse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1988, first harvest yields were not affected by N PNC”
t0“Tomato”
Claim · model-written summary
Early yield increased with N to 200 mg·liter -1 in 1989.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Ne0
- Outcome
- early yieldse0
- Direction
- increasede0
- Value
- 200 mg·liter -1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in 1989, as N increased to 200 mg·liter -1 , early yields increased”
t0“Tomato”
Claim · model-written summary
Total yield increased as N rose from 100 to 200 mg·liter -1 in 1988.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- N PNCe0
- Outcome
- total yieldse0
- Direction
- increasede0
- Value
- 200 mg·liter -1e0
- Comparator
- 100e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1988, total yields increased wit h N PNC from 100 to 200 mg·liter -1”
t0“Tomato”
Claim · model-written summary
In 1989 total yield increased with N from 50 to 100 mg·liter -1, with no further rise to 200 mg·liter -1.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Ne0
- Direction
- no further increasese0
- Value
- 100 mg·liter -1e0
- Comparator
- 50e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in 1989 with N at 50 to 100 mg·liter -1 with no further increases from 100 to 200 mg·liter -1”
e1“In 1988, total yields increased wit h N PNC from 100 to 200 mg·liter -1”
t0“Tomato”
Claim · model-written summary
Low temperature had no effect on earliness, yield or quality.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Low-temperature exposuree0
- Outcome
- earliness, yield, or qualitye0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low-temperature exposure had no effect on earliness, yield, or quality”
t0“Tomato”
Claim · model-written summary
The authors recommend at least 200 mg N/liter and up to 10 mg P/liter to enhance yield.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- at least 200 mg N/liter and up to 10 mg P/litere0
- Outcome
- enhance yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A PNC regime combining at least 200 mg N/liter and up to 10 mg P/liter should be used to nutritionally condition `Sunny' tomato seedlings to enhance yield”
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