Abstract
Solar radiation entering a high-wire tomato greenhouse is mostly intercepted by the top of the crop canopy, while the role of lower leaves diminishes with age, turning them into sink organs rather than sources. Accordingly, the defoliation of basal leaves is a widely applied agronomic practice in high-wire greenhouse cultivation management. However, the recent increase in the application of supplemental light emitting diode (LED) lighting for high-density tomato production may affect the role of basal leaves, promoting their source role for fruit development and growth. The present research aims to explore the application of supplementary LED lighting on Solanum lycopersicum cv. Siranzo in the Mediterranean area during the cold season in combination with two regimes of basal defoliation. The defoliation factors consisted of the early removal of the leaves (R) right under the developing truss before the fruit turning stage and a non-removal (NR) during the entire cultivation cycle. The lighting factors consisted of an artificial LED lighting treatment with red and blue diodes for 16 h d−1 (h 8-00) with an intensity of 180 µmol s−1 m−2 (RB) and a control cultivated under natural light only (CK). The results demonstrated a great effect of the supplemental LED light, which increased the total yield (+118%), favoring fruit setting (+46%) and faster ripening (+60%) regardless of defoliation regimes, although the increased energy prices hinder the economic viability of the technology. Concerning fruit quality, defoliation significantly reduced the soluble solid content, while it increased the acidity when combined with natural light.
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Claims 6
Claim · model-written summary
Supplemental LED light increased total tomato yield by 118% compared with natural light only, regardless of defoliation.
- Taxon
- Solanum lycopersicum
Solanum lycopersicume0 - Material
- Siranzoe0
- Treatment
- supplemental LED lighte2
- Outcome
- total yielde2
- Direction
- increasede2
- Value
- +118%e2
- Qualifier
- regardless of defoliation regimese2
- Comparator
- natural light onlye1
- Setting
- Mediterranean areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“explore the application of supplementary LED lighting on Solanum lycopersicum cv. Siranzo in the Mediterranean area during the cold season”
e1“a control cultivated under natural light only (CK)”
e2“The results demonstrated a great effect of the supplemental LED light, which increased the total yield (+118%), favoring fruit setting (+46%) and faster ripening (+60%) regardless of defoliation regimes”
Claim · model-written summary
Supplemental LED light increased fruit setting by 46% compared with natural light only.
- Taxon
- Solanum lycopersicumSolanum lycopersicume0
- Material
- Siranzoe0
- Treatment
- supplemental LED lighte2
- Outcome
- fruit settinge2
- Direction
- increaseinferrede2
- Value
- +46%e2
- Qualifier
- regardless of defoliation regimese2
- Comparator
- natural light onlye1
- Setting
- Mediterranean areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“explore the application of supplementary LED lighting on Solanum lycopersicum cv. Siranzo in the Mediterranean area during the cold season”
e1“a control cultivated under natural light only (CK)”
e2“The results demonstrated a great effect of the supplemental LED light, which increased the total yield (+118%), favoring fruit setting (+46%) and faster ripening (+60%) regardless of defoliation regimes”
Claim · model-written summary
Supplemental LED light gave faster ripening (+60%) compared with natural light only.
- Taxon
- Solanum lycopersicumSolanum lycopersicume0
- Material
- Siranzoe0
- Treatment
- supplemental LED lighte2
- Outcome
- ripeninge2
- Direction
- fastere2
- Value
- +60%e2
- Qualifier
- regardless of defoliation regimese2
- Comparator
- natural light onlye1
- Setting
- Mediterranean areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“explore the application of supplementary LED lighting on Solanum lycopersicum cv. Siranzo in the Mediterranean area during the cold season”
e1“a control cultivated under natural light only (CK)”
e2“The results demonstrated a great effect of the supplemental LED light, which increased the total yield (+118%), favoring fruit setting (+46%) and faster ripening (+60%) regardless of defoliation regimes”
Claim · model-written summary
Defoliation significantly reduced tomato soluble solid content.
- Taxon
- Solanum lycopersicumSolanum lycopersicume0
- Treatment
- defoliatione3
- Outcome
- soluble solid contente3
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“explore the application of supplementary LED lighting on Solanum lycopersicum cv. Siranzo in the Mediterranean area during the cold season”
e3“Concerning fruit quality, defoliation significantly reduced the soluble solid content, while it increased the acidity when combined with natural light”
Claim · model-written summary
Defoliation combined with natural light increased tomato fruit acidity.
- Taxon
- Solanum lycopersicumSolanum lycopersicume0
- Treatment
- defoliatione3
- Outcome
- aciditye3
- Direction
- increasede3
- Qualifier
- when combined with natural lighte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“explore the application of supplementary LED lighting on Solanum lycopersicum cv. Siranzo in the Mediterranean area during the cold season”
e3“Concerning fruit quality, defoliation significantly reduced the soluble solid content, while it increased the acidity when combined with natural light”
Claim · model-written summary
Increased energy prices are stated to hinder the economic viability of the LED lighting technology for tomato.
- Taxon
- Solanum lycopersicumSolanum lycopersicume0
- Outcome
- economic viability of the technologye4
- Qualifier
- increased energy pricese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“explore the application of supplementary LED lighting on Solanum lycopersicum cv. Siranzo in the Mediterranean area during the cold season”
e4“although the increased energy prices hinder the economic viability of the technology”
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