Abstract
The method of automatically controlling the CO2 concentration in a greenhouse depending on ventilation was examined in order to efficiently improve the productivity of strawberries under the weather conditions in the northern part of Kyushu in Japan. The effects of CO2 enrichment on the yields, fruit Brix, and economic value of the strawberry ‘Sagahonoka’ were investigated. In addition, in order to clarify the physiological response of ‘Sagahonoka’ to the CO2 concentration, the photosynthetic rate, translocation, and photoassimilate distribution rate were measured. It was found that maintaining the CO2 concentrations above 800 μmol mol−1 and 400 μmol mol−1 during no ventilation and ventilation, respectively, resulted in 25% increases in marketable fruit yields and a 0.2–1.2% higher fruit Brix compared to control, which was kept in 400 μmol mol−1 CO2 or above all day regardless of ventilation. Additionally, the economic value of ‘Sagahonoka’ was increased. The photosynthetic rate of ‘Sagahonoka’ increased linearly up to 800 μmol mol−1 CO2, and high CO2 concentrations affected the distribution for the primary fruit, the most significant sink. It was clarified that CO2 enrichment at 800 μmol mol−1 for ‘Sagahonoka’ was effective in increasing the photosynthetic rate and distribution of photoassimilates to fruits, and the yields of strawberries could be increased efficiently by automatically controlling the CO2 concentration depending on ventilation in a southern region of Japan.
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Claims 6
Claim · model-written summary
Ventilation-dependent CO2 control increased marketable fruit yield by 25%.
- Taxon
- Strawberry
_single2.jpg?width=60)
Fragaria ×ananassat0 - Treatment
- maintaining the CO2 concentrations above 800 μmol mol−1 and 400 μmol mol−1 during no ventilation and ventilatione0
- Outcome
- marketable fruit yieldse0
- Direction
- increasese0
- Value
- 25%e0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“maintaining the CO2 concentrations above 800 μmol mol−1 and 400 μmol mol−1 during no ventilation and ventilation, respectively, resulted in 25% increases in marketable fruit yields”
t0“Strawberry”
e1“a 0.2–1.2% higher fruit Brix compared to control”
Claim · model-written summary
Ventilation-dependent CO2 control raised fruit Brix by 0.2–1.2%.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- CO2 enrichmente1
- Outcome
- fruit Brixe0
- Direction
- highere0
- Value
- 0.2–1.2%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 0.2–1.2% higher fruit Brix compared to control”
t0“Strawberry”
e1“CO2 enrichment at 800 μmol mol−1 for ‘Sagahonoka’ was effective in increasing the photosynthetic rate and distribution of photoassimilates to fruits”
Claim · model-written summary
CO2 enrichment increased Sagahonoka economic value.
- Taxon
- StrawberryFragaria ×ananassat0
- Material
- Sagahonokae0
- Treatment
- CO2 enrichmente1
- Outcome
- economic valuee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the economic value of ‘Sagahonoka’ was increased”
t0“Strawberry”
e1“CO2 enrichment at 800 μmol mol−1 for ‘Sagahonoka’ was effective in increasing the photosynthetic rate and distribution of photoassimilates to fruits”
Claim · model-written summary
Sagahonoka photosynthesis rose linearly up to 800 μmol mol−1 CO2.
- Taxon
- StrawberryFragaria ×ananassat0
- Material
- Sagahonokae0
- Treatment
- CO2e0
- Outcome
- photosynthetic ratee0
- Direction
- increasede0
- Value
- 800 μmol mol−1 CO2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthetic rate of ‘Sagahonoka’ increased linearly up to 800 μmol mol−1 CO2”
t0“Strawberry”
Claim · model-written summary
High CO2 affected photoassimilate distribution to primary fruit.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- high CO2 concentrationse0
- Outcome
- distribution for the primary fruite0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high CO2 concentrations affected the distribution for the primary fruit, the most significant sink”
t0“Strawberry”
Claim · model-written summary
The authors concluded 800 μmol mol−1 CO2 increased photosynthetic rate and fruit photoassimilate distribution.
- Taxon
- StrawberryFragaria ×ananassat0
- Material
- Sagahonokae0
- Treatment
- CO2 enrichment at 800 μmol mol−1e0
- Outcome
- photosynthetic rate and distribution of photoassimilates to fruitse0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO2 enrichment at 800 μmol mol−1 for ‘Sagahonoka’ was effective in increasing the photosynthetic rate and distribution of photoassimilates to fruits”
t0“Strawberry”
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