Abstract
The study was conducted in greenhouse at horticulture department of the Instituto Federal do Espírito Santo, Campus Itapina, Colatina, northwestern Espírito Santo state, Brazil, with the objective of evaluating the effect of cooling and electrical conductivity of nutrient solution on growth and development of lettuce cv. Vitória de Santo Antão in hydroponics. The study was conducted in a completely randomized design with two factors (control of the maximum temperature of the nutrient solution: 26ºC and without control; and electrical conductivity, EC, of the solution: 1, 2 and 3 dS m-1) with three repetitions. The plants were harvested fifty-two days after sowing (DAS). We evaluated the dry and fresh mass of leaves, stems and roots, stem and root length, root volume and plant water content (%). The temperature of the nutrient solution influenced the behavior of lettuce influenced by the electrical conductivity, showing that the increase of the EC did not reduce the lettuce productivity when the maximum temperature of the nutrient solution is limited, which in this experiment was tested at 26ºC. The cooling of the nutrient solution provided greater accumulation of mass and a higher water percentage in plants, increasing the productivity of hydroponic lettuce in tropical climate.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 4
Claim · model-written summary
Increasing conductivity did not reduce lettuce productivity when solution temperature was limited to 26ºC.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- the increase of the ECe0
- Outcome
- lettuce productivitye0
- Direction
- did not reducee0
- Value
- 26ºCe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase of the EC did not reduce the lettuce productivity when the maximum temperature of the nutrient solution is limited, which in this experiment was tested at 26ºC”
Claim · model-written summary
Cooling the nutrient solution increased mass accumulation in lettuce.
- Taxon
- lettuceLactuca sativae0
- Treatment
- cooling of the nutrient solutione0
- Outcome
- accumulation of masse0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cooling of the nutrient solution provided greater accumulation of mass and a higher water percentage in plants, increasing the productivity of hydroponic lettuce in tropical climate.”
Claim · model-written summary
Cooling the nutrient solution increased plant water percentage.
- Taxon
- lettuceLactuca sativae0
- Treatment
- cooling of the nutrient solutione0
- Outcome
- water percentagee0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cooling of the nutrient solution provided greater accumulation of mass and a higher water percentage in plants, increasing the productivity of hydroponic lettuce in tropical climate.”
Claim · model-written summary
Cooling the nutrient solution increased hydroponic lettuce productivity in tropical climate.
- Taxon
- lettuceLactuca sativae0
- Treatment
- cooling of the nutrient solutione0
- Outcome
- productivity of hydroponic lettucee0
- Direction
- increasinge0
- Setting
- tropical climatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cooling of the nutrient solution provided greater accumulation of mass and a higher water percentage in plants, increasing the productivity of hydroponic lettuce in tropical climate.”
The same questions in other papers
processing · molecular: metabolites · Lactuca sativa (garden lettuce)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- no effect
3 papers more in this group
See all 7 papers →processing · yield · Lactuca sativa (garden lettuce)Positive and negative results
10 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
9 papers more in this group
See all 13 papers →fertilization · molecular: metabolites · Lactuca sativa (garden lettuce)Positive and negative results
50 papers in the same direction as this paper · 11 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
59 papers more in this group
See all 63 papers →fertilization · yield · Lactuca sativa (garden lettuce)Positive and negative results
212 papers in the same direction as this paper · 34 in the opposite direction · 2 reporting no difference from an alternative
- positive
- negative
- no effect
245 papers more in this group
See all 249 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.