Claim · model-written summary
Decreasing PFD or lighting frequency increased mean light utilization.
- Taxon
- pot roses ( Rosa sp. cv. Golden Hit), Kalanchoe blossfeldiana cv. Debbie and Begonia × hiemalis cv. Barkos
Rosa sp._Kalanchoe_blossfeldiana_-_inflorescence.jpg?width=60)
Kalanchoe blossfeldiana
Begonia ×hiemalise0 - Treatment
- decreasing the PFD or lighting frequencye1
- Outcome
- mean light utilizatione1
- Direction
- increasede1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Kalanchoe_blossfeldiana_-_inflorescence.jpg?width=500)
Verbatim
e0“pot roses ( Rosa sp. cv. Golden Hit), Kalanchoe blossfeldiana cv. Debbie and Begonia × hiemalis cv. Barkos”
e1“The mean light utilization, defined as dry weight produced per plant per mol m -2 day -1 , was increased by decreasing the PFD or lighting frequency.”
Title
Growth and light utilization of pot plants at variable day-to-day irradiances
L. M. Mortensen European Journal of Horticultural Science 2004. doi:10.1079/ejhs.2004/20708
Other claims from this paper (5)
- Intervention effect Increasing photon flux density or lighting frequency reduced time to flowering in all three species.
- Intervention effect Increasing PFD from 50 to 150 increased plant dry weight and mean daily growth rate.
- Intervention effect Further PFD increase to 200 had no effect on plant dry weight and growth rate.
- Observation Low PAR for one to three days could not be compensated by high PAR on other days.
- Recommendation Sufficient PAR should be applied daily for good plant growth.