Beitrag in Konferenzband

Influence of varying plastic films on plant and fruit performance of primocane raspberry 'Erika'


Details zur Publikation

AutorenlisteZaar A., Dietrich H., Krüger E.

Jahr der Veröffentlichung2016

BuchtitelProceedings of the XI International Rubus and Ribes Symposium

SerientitelActa Horticulturae

Serienzählung1133

Erste Seite291

Letzte Seite297

OrtLeuven

ISBN978-94-6261-115-3

DOI10.17660/ActaHortic.2016.1133.45

SprachenEnglisch

Peer reviewed


Abstract

In 2014, potted primocane raspberry Rubus idaeus 'Erika' was
cultivated under open field conditions and under high tunnels with two
plastic types (UVB-blocking: transmittance 90% with 0% transparency for
UV B radiation and UVB-window: transmittance 90%, with 75% transparency
for UV B) to evaluate their impact on net photosynthesis and different
plant characteristics like yield and diverse fruit quality traits.
Diurnal photosynthetic response curves displayed a strong midday
depression with a partial recovery in the late afternoon and were mostly
influenced by air temperature and rel. humidity of ambient conditions
but also by varying climatic conditions under the high tunnels
(increased air temperature and reduced rel. humidity than in open
field). Critical temperature for net photosynthesis in this study was
slightly above 20°C. However, the effect of the different plastic
materials on photosynthesis was negligible compared to temperature and
relative humidity.
At harvest end net photosynthesis was influenced by the treatment as
harvest period under high tunnels was 3 weeks earlier in comparison to
open field and plant senescence occurred earlier.
Yield was lowest in the open field while fruit weight was lowest under
the UV B window plastic film.
The treatments had no influence on fruit firmness, soluble solids,
titratable acidity and vitamin C content.
Fruits grown in open field were more intense in their red color (a*
value and Hue), corresponding to higher total anthocyanin content.
Individual anthocyanins were inconsistently affected