The aim of this research was to investigate the radiometric properties of innovative covering films for protected cultivation capable of modifying the spectral distribution of the transmitted radiation and thus the vegetative activity. Two photoselective films, three photoluminescent films and one low-density polyethylene film were used as greenhouse coverings for cherry trees and peach trees, grown in pots. The transmissivity of the different films under natural radiation was measured to compute R/FR and B/FR ratios. The photoselective films were characterised by a reduction of the R/FR ratio in comparison to the natural solar radiation. Tree growth parameters, such as apical shoot of cherry trees and shoot of peach trees, were monitored. Different response to vegetative activities has been observed under the films, depending of species, with higher shoots growth rate in peach respect to cherry. The photoselective film characterised by the lowest R/FR ratio and by the highest B/FR ratio enhanced significantly the growth of cherry and peach in comparison to the trees cultivated under the other greenhouse films.
Influence of the Radiometric Characteristics of Innovative Photoselective and Photoluminescent Plastic Films on the Growth of Fruit Trees
SCHETTINI, Evelia;VOX, Giuliano;SCARASCIA MUGNOZZA, Giacomo;
2008-01-01
Abstract
The aim of this research was to investigate the radiometric properties of innovative covering films for protected cultivation capable of modifying the spectral distribution of the transmitted radiation and thus the vegetative activity. Two photoselective films, three photoluminescent films and one low-density polyethylene film were used as greenhouse coverings for cherry trees and peach trees, grown in pots. The transmissivity of the different films under natural radiation was measured to compute R/FR and B/FR ratios. The photoselective films were characterised by a reduction of the R/FR ratio in comparison to the natural solar radiation. Tree growth parameters, such as apical shoot of cherry trees and shoot of peach trees, were monitored. Different response to vegetative activities has been observed under the films, depending of species, with higher shoots growth rate in peach respect to cherry. The photoselective film characterised by the lowest R/FR ratio and by the highest B/FR ratio enhanced significantly the growth of cherry and peach in comparison to the trees cultivated under the other greenhouse films.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
