Abstract
Abstract The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses. The “ventilated” control house was cooled at 26.5°C with conventional ventilation fans and wetted pads. The “unventilated” houses were cooled at 26.5° by recirculating the greenhouse air through direct-contact heat exchanger pads sprayed with water from evaporative cooling towers and also under severely humid conditions by ventilating at 29.5°. For the first spring crop, the ventilated control house at ambient CO 2 yielded 8.58 kg/plant (0.35 m 2 /plant). Unventilated houses enriched with 650 and 1000 μl CO 2 /liter air had 17 and 48% greater yields than the control. An unventilated, unenriched house suffered a 13% yield decrease. For the second winter crop, the control house yielded 8.48 and 9.70 kg/plant at standard and high nutrient levels, respectively. At the standard nutrient level, unventilated houses yielded 64 and 63% greater than the control at 1000 and 1350 μl CO 2 /liter, respectively. At the high nutrient level, they yielded 35 and 37% greater. A ventilated house enriched to 1000 μl/liter whenever cooling was not required yielded 8 and 10% greater than the control at the standard and high nutrient levels, respectively.
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Claims 12
Claim · model-written summary
Unventilated houses enriched with 650 μl CO2/liter had 17% greater tomato yield than the control
- Taxon
- tomatoes
Solanum lycopersicume1 - Material
- Tropice1
- Treatment
- enriched with 650 and 1000 μl CO 2 /liter aire2
- Outcome
- yieldse2
- Direction
- greatere2
- Value
- 17e2
- Qualifier
- 650e2
- Comparator
- the controle2
- Setting
- greenhousese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e2“Unventilated houses enriched with 650 and 1000 μl CO 2 /liter air had 17 and 48% greater yields than the control”
Claim · model-written summary
Unventilated houses enriched with 1000 μl CO2/liter had 48% greater tomato yield than the control
- Taxon
- tomatoesSolanum lycopersicume1
- Material
- Tropice1
- Treatment
- enriched with 650 and 1000 μl CO 2 /liter aire2
- Outcome
- yieldse2
- Direction
- greatere2
- Value
- 48e2
- Qualifier
- 1000e2
- Comparator
- the controle2
- Setting
- greenhousese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e2“Unventilated houses enriched with 650 and 1000 μl CO 2 /liter air had 17 and 48% greater yields than the control”
Claim · model-written summary
An unventilated, unenriched tomato house suffered a 13% yield decrease
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e3“An unventilated, unenriched house suffered a 13% yield decrease”
Claim · model-written summary
The ventilated control house yielded 8.58 kg/plant in the first spring crop
- Taxon
- tomatoesSolanum lycopersicume1
- Material
- Tropice1
- Outcome
- yieldede4
- Value
- 8.58 kg/plante4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e4“For the first spring crop, the ventilated control house at ambient CO 2 yielded 8.58 kg/plant”
Claim · model-written summary
The control house yielded 8.48 kg/plant in the second winter crop at standard nutrient level
- Taxon
- tomatoesSolanum lycopersicume1
- Outcome
- yieldede5
- Value
- 8.48e5
- Qualifier
- standarde5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e5“For the second winter crop, the control house yielded 8.48 and 9.70 kg/plant at standard and high nutrient levels, respectively”
Claim · model-written summary
The control house yielded 9.70 kg/plant in the second winter crop at high nutrient level
- Taxon
- tomatoesSolanum lycopersicume1
- Outcome
- yieldede5
- Value
- 9.70e5
- Qualifier
- highe5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e5“For the second winter crop, the control house yielded 8.48 and 9.70 kg/plant at standard and high nutrient levels, respectively”
Claim · model-written summary
Unventilated houses at standard nutrient level yielded 64% more than the control at 1000 μl CO2/liter
- Taxon
- tomatoesSolanum lycopersicume1
- Treatment
- unventilated housese6
- Outcome
- yieldede6
- Direction
- greatere6
- Value
- 64e6
- Qualifier
- 1000e6
- Comparator
- the controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e6“At the standard nutrient level, unventilated houses yielded 64 and 63% greater than the control at 1000 and 1350 μl CO 2 /liter, respectively”
Claim · model-written summary
Unventilated houses at standard nutrient level yielded 63% more than the control at 1350 μl CO2/liter
- Taxon
- tomatoesSolanum lycopersicume1
- Treatment
- unventilated housese6
- Outcome
- yieldede6
- Direction
- greatere6
- Value
- 63e6
- Qualifier
- 1350e6
- Comparator
- the controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e6“At the standard nutrient level, unventilated houses yielded 64 and 63% greater than the control at 1000 and 1350 μl CO 2 /liter, respectively”
Claim · model-written summary
Unventilated houses at high nutrient level yielded 35% more than the control at 1000 μl CO2/liter
- Taxon
- tomatoesSolanum lycopersicume1
- Treatment
- unventilated housese6
- Outcome
- yieldede7
- Direction
- greatere7
- Value
- 35e7
- Qualifier
- high nutrient levele7
- Comparator
- the controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e6“At the standard nutrient level, unventilated houses yielded 64 and 63% greater than the control at 1000 and 1350 μl CO 2 /liter, respectively”
e7“At the high nutrient level, they yielded 35 and 37% greater”
Claim · model-written summary
Unventilated houses at high nutrient level yielded 37% more than the control at 1350 μl CO2/liter
- Taxon
- tomatoesSolanum lycopersicume1
- Treatment
- unventilated housese6
- Outcome
- yieldede7
- Direction
- greatere7
- Value
- 37e7
- Qualifier
- high nutrient levele7
- Comparator
- the controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e6“At the standard nutrient level, unventilated houses yielded 64 and 63% greater than the control at 1000 and 1350 μl CO 2 /liter, respectively”
e7“At the high nutrient level, they yielded 35 and 37% greater”
Claim · model-written summary
A ventilated house enriched to 1000 μl/liter when cooling was not required yielded 8% more than the control at standard nutrient level
- Taxon
- tomatoesSolanum lycopersicume1
- Treatment
- enriched to 1000 μl/liter whenever cooling was not requirede2
- Outcome
- yieldede2
- Direction
- greatere2
- Value
- 8e2
- Qualifier
- standarde2
- Comparator
- the controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e2“A ventilated house enriched to 1000 μl/liter whenever cooling was not required yielded 8 and 10% greater than the control at the standard and high nutrient levels, respectively”
Claim · model-written summary
A ventilated house enriched to 1000 μl/liter when cooling was not required yielded 10% more than the control at high nutrient level
- Taxon
- tomatoesSolanum lycopersicume1
- Treatment
- enriched to 1000 μl/liter whenever cooling was not requirede2
- Outcome
- yieldede2
- Direction
- greatere2
- Value
- 10e2
- Qualifier
- highe2
- Comparator
- the controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The yield of 2 crops of tomatoes ( Lycopersicon esculentum Mill. cv. Tropic) was determined in CO 2 enriched, unventilated and conventionally ventilated greenhouses”
e2“A ventilated house enriched to 1000 μl/liter whenever cooling was not required yielded 8 and 10% greater than the control at the standard and high nutrient levels, respectively”
The same questions in other papers
co2 · yield · Solanum lycopersicum (tomato)Results differ
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- positive
- no effect
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35 papers in the same direction as this paper · 8 in the opposite direction
- negative
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See all 44 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.