Abstract
SummaryThe aim of the research work was to evaluate the effects of two levels of electrical conductivity (EC) of the nutrient solution, i.e. high night and low day EC v continuously low EC, on water consumption, physiological responses, yield, and fruit quality of two tomato cultivars (Diana and Naomi). The use of a nutrient solution with high EC during the night (6.dS m±1) did not modify plant growth. The daily water consumption of tomato plants was not modi®ed by the nutrient solution EC, however water consumption during the night was on average 9±19% of the total daily uptake. Both at the second cluster setting stage and beginning of harvests, the high night and low day EC treatment decreased stomatal conductance (13%) and leaf net CO2 assimilation (8%). The values of `Diana' and `Naomi' of yield of tomato (4.5 and 3.0.kg plant±1, respectively, for `Diana' and `Naomi') or mass of fruits, fruit dry mass, titratable acidity, and ascorbic acid were not in¯uenced by the nutrient solution EC. However, in the cherry tomato type (`Naomi') the number of fruits within optimal size values (<40.mm), which is of crucial importance for their marketability, was higher with high EC in the night hours. The total soluble solids were higher with low/high (day/ night) EC than continuously low EC (7.0 v 6.6 8Brix for `Naomi' and 4.6 v 4.3 for `Diana'), so nutrient solutions with high night and low day EC appear to improve the quality of fruits of soilless grown tomato plants without affecting fruit yield.
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Claims 9
Claim · model-written summary
High night EC did not modify plant growth.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- high EC during the night (6.dS m±1)e0
- Outcome
- plant growthe0
- Direction
- did not modifye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“The use of a nutrient solution with high EC during the night (6.dS m±1) did not modify plant growth.”
Claim · model-written summary
Nutrient solution EC did not modify daily water consumption.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- nutrient solution ECe0
- Outcome
- daily water consumptione0
- Direction
- not modi®ede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The daily water consumption of tomato plants was not modi®ed by the nutrient solution EC”
Claim · model-written summary
Night water consumption averaged 9±19% of daily uptake.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- water consumption during the nighte0
- Value
- 9±19%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water consumption during the night was on average 9±19% of the total daily uptake”
t0“tomato”
Claim · model-written summary
High night and low day EC decreased stomatal conductance by 13%.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- high night and low day EC treatmente0
- Outcome
- stomatal conductancee0
- Direction
- decreasede0
- Value
- 13%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“the high night and low day EC treatment decreased stomatal conductance (13%) and leaf net CO2 assimilation (8%)”
Claim · model-written summary
High night and low day EC decreased leaf net CO2 assimilation by 8%.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- high night and low day EC treatmente0
- Outcome
- leaf net CO2 assimilatione0
- Direction
- decreasede0
- Value
- 8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“the high night and low day EC treatment decreased stomatal conductance (13%) and leaf net CO2 assimilation (8%)”
Claim · model-written summary
Nutrient EC did not influence yield or fruit mass.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- nutrient solution ECe0
- Outcome
- yield of tomatoe0
- Direction
- not in¯uencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“yield of tomato (4.5 and 3.0.kg plant±1, respectively, for `Diana' and `Naomi') or mass of fruits, fruit dry mass, titratable acidity, and ascorbic acid were not in¯uenced by the nutrient solution EC.”
Claim · model-written summary
High night EC increased optimally sized fruits in Naomi.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Naomie0
- Treatment
- high EC in the night hourse0
- Outcome
- number of fruits within optimal size valuese0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“in the cherry tomato type (`Naomi') the number of fruits within optimal size values (<40.mm), which is of crucial importance for their marketability, was higher with high EC in the night hours.”
Claim · model-written summary
Low day and high night EC raised soluble solids in Naomi.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Naomie0
- Treatment
- low/high (day/ night) ECe0
- Outcome
- total soluble solidse0
- Direction
- highere0
- Value
- 7.0 v 6.6 8Brixe0
- Comparator
- continuously low ECe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“The total soluble solids were higher with low/high (day/ night) EC than continuously low EC (7.0 v 6.6 8Brix for `Naomi' and 4.6 v 4.3 for `Diana')”
Claim · model-written summary
Low day and high night EC raised soluble solids in Diana.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Dianae0
- Treatment
- low/high (day/ night) ECe0
- Outcome
- total soluble solidse0
- Direction
- highere0
- Value
- 4.6 v 4.3e0
- Comparator
- continuously low ECe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“The total soluble solids were higher with low/high (day/ night) EC than continuously low EC (7.0 v 6.6 8Brix for `Naomi' and 4.6 v 4.3 for `Diana')”
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