Effects of nutrient solution EC, plant microclimate and cultivars on fruit quality and yield of hydroponic tomatoes (Lycopersicon esculentum)

Min Wu, Johann S. Buck, Chieri Kubota

Research output: Chapter in Book/Report/Conference proceedingConference contribution

31 Citations (Scopus)

Abstract

Four cultivars (Blitz, Mariachi, Quest and Rapsodie) of tomato were grown hydroponically on rockwool in two microclimates (east and west) inside the greenhouse (Tucson, AZ) under two nutrient solution electrical conductivity (EC) levels (2.6 or 4.5 dS m-1), adjusted by adding NaCl and CaCl2 after the setting of first fruit truss. In all cultivars, total soluble solid (TSS, %Brix at 20oC) and lycopene concentration of fruits increased by 12-23 % and 34-85 %, respectively, with increasing EC level. Fruits harvested from the east side of the greenhouse had higher TSS than those from the west side, due to the different plant microclimate varying by daily PPF (photosynthetic photon flux) and VPD (vapor pressure deficit). However, lycopene concentration in fruits was not significantly affected by plant microclimate regardless of cultivars or EC. The cultivar Mariachi had the strongest effect in response to nutrient solution EC levels regarding both TSS and lycopene concentration among the cultivars examined. The cumulative yield at 7 weeks had no significant differences between nutrient solution EC and locations, regardless of cultivars. The results indicated that value added tomato fruits could be produced by manipulating EC and plant microclimate in the greenhouse without causing yield reduction.

Original languageEnglish (US)
Title of host publicationActa Horticulturae
Pages541-547
Number of pages7
Volume659
StatePublished - 2004

Publication series

NameActa Horticulturae
Volume659
ISSN (Print)05677572

Fingerprint

microclimate
hydroponics
fruit yield
Solanum lycopersicum var. lycopersicum
nutrient solutions
electrical conductivity
fruit quality
tomatoes
cultivars
lycopene
fruits
greenhouses
value added
brix
vapor pressure
total soluble solids

Keywords

  • Cultivar
  • Fruit yield
  • Gas exchange
  • Greenhouse
  • Harvest
  • Lycopene
  • Total soluble solid
  • Vapor pressure deficit

ASJC Scopus subject areas

  • Horticulture

Cite this

Wu, M., Buck, J. S., & Kubota, C. (2004). Effects of nutrient solution EC, plant microclimate and cultivars on fruit quality and yield of hydroponic tomatoes (Lycopersicon esculentum). In Acta Horticulturae (Vol. 659, pp. 541-547). (Acta Horticulturae; Vol. 659).

Effects of nutrient solution EC, plant microclimate and cultivars on fruit quality and yield of hydroponic tomatoes (Lycopersicon esculentum). / Wu, Min; Buck, Johann S.; Kubota, Chieri.

Acta Horticulturae. Vol. 659 2004. p. 541-547 (Acta Horticulturae; Vol. 659).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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