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Daily Evapotranspiration of Guzmania ‘Irene’ and Vriesea ‘Carly’ Bromeliads Produced in a Shaded Greenhouse
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Bromeliads are important ornamental foliage plants, but until now, their daily water use during production was unknown. Using a canopy closure model developed for container-grown woody ornamental plants, in this study we investigated actual evapotranspiration (ET
A
) of
Guzmania
‘Irene’ and
Vriesea
‘Carly’ from tissue-cultured liners grown in 15-cm containers to marketable sizes in a shaded greenhouse. The mean daily ET
A
of
Guzmania
‘Irene’ ranged from 4.02 to 66.35 mL per plant, and the mean cumulative ET
A
was 16.66 L over a 95-week production period. The mean daily ET
A
of
Vriesea
‘Carly’ varied from 3.98 to 59.89 mL per plant, and the mean cumulative ET
A
was 15.52 L over the same production period as the
Guzmania
cultivar. The best-fit models for predicting daily ET
A
of the two bromeliads were developed, which had correlation coefficients (
r
2
) of 0.79 for
Guzmania
‘Irene’ and 0.68 for
Vriesea
‘Carly’. The success in the model of ET
A
for both bromeliads suggested that the canopy closure model was equally applicable to container-grown ornamental foliage plants produced in greenhouse conditions. The daily ET
A
and cumulative ET
A
values represent research-based information on water requirements, and, when applied, could improve irrigation practices in bromeliad production. This study also showed that roots per se of the two epiphytic bromeliads were able to absorb water and nutrients from a peat-based container substrate and support their complete life cycles.
Title: Daily Evapotranspiration of Guzmania ‘Irene’ and Vriesea ‘Carly’ Bromeliads Produced in a Shaded Greenhouse
Description:
Bromeliads are important ornamental foliage plants, but until now, their daily water use during production was unknown.
Using a canopy closure model developed for container-grown woody ornamental plants, in this study we investigated actual evapotranspiration (ET
A
) of
Guzmania
‘Irene’ and
Vriesea
‘Carly’ from tissue-cultured liners grown in 15-cm containers to marketable sizes in a shaded greenhouse.
The mean daily ET
A
of
Guzmania
‘Irene’ ranged from 4.
02 to 66.
35 mL per plant, and the mean cumulative ET
A
was 16.
66 L over a 95-week production period.
The mean daily ET
A
of
Vriesea
‘Carly’ varied from 3.
98 to 59.
89 mL per plant, and the mean cumulative ET
A
was 15.
52 L over the same production period as the
Guzmania
cultivar.
The best-fit models for predicting daily ET
A
of the two bromeliads were developed, which had correlation coefficients (
r
2
) of 0.
79 for
Guzmania
‘Irene’ and 0.
68 for
Vriesea
‘Carly’.
The success in the model of ET
A
for both bromeliads suggested that the canopy closure model was equally applicable to container-grown ornamental foliage plants produced in greenhouse conditions.
The daily ET
A
and cumulative ET
A
values represent research-based information on water requirements, and, when applied, could improve irrigation practices in bromeliad production.
This study also showed that roots per se of the two epiphytic bromeliads were able to absorb water and nutrients from a peat-based container substrate and support their complete life cycles.
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