Film foto selettivi e fotoluminescenti ed effetti sulla crescita delle piante

Photoselective and photoluminescent films and effects on the plant growth. Photoselective and photoluminescent plastic films for protected cultivation modify the spectral distribution of the solar radiation thus influencing plant growth. This paper shows the results of the tests carried out at the experimental farm of the University of Bari from December 2006 to September 2007; two photoselective films (GREEN4% and GREEN2%), three photoluminescent films (RED, BLUE and RED-BLUE) and one low density polyethylene film were used to cover greenhouses where cherry and peach trees were grown. The lowest vegetative activity was recorded for the trees grown in open field in comparison with the trees grown inside the greenhouses. The photoselective films influenced positively the growth of the trees, especially the GREEN4% film. Among the photoluminescent films the RED film was more efficient in increasing the vegetative activity; it was due to the film capacity of absorbing UV radiation and re-emitting it in the wavelength band of the red radiation, which is very efficient for photosynthesis.

Photoselective and photoluminescent plastic films for protected cultivation modify the spectral distribution of the solar radiation thus influencing plant growth. This paper shows the results of the tests carried out at the experimental farm of the University of Bari from December 2006 to September 2007; two photoselective films (GREEN4%and GREEN2%), three photoluminescent films (RED, BLUE and REDBLUE) and one low density polyethylene film were used to cover greenhouses where cherry and peach trees were grown. The lowest vegetative activity was recorded for the trees grown in open field in comparison with the trees grown inside the greenhouses. The photoselective films influenced positively the growth of the trees, especially the GREEN4% film. Among the photoluminescent films the RED film was more efficient in increasing the vegetative activity; it was due to the film capacity of absorbing UV radiation and retransmitting it in the wavelength band of the red radiation, which is very efficient for photosynthesis.

I filmfotoselettivi e fotoluminescenti per la protezione delle colture modificano la distribuzione spettrale della radiazione solare, influenzando la crescita delle piante. In questo lavoro sono riportati i risultati di prove sperimentali condotte su alberi di pesco e ciliegio allevati in ambiente protetto presso il centro sperimentale dell’Università di Bari da Dicembre 2006 a Settembre 2007; nella prova sono stati utilizzati due film sperimentali fotoselettivi (GREEN4% e GREEN2%), tre film sperimentali fotoluminescenti (RED, BLUE e REDBLUE) e, per confronto, un film standard in polietilene a bassa densità. I risultati della ricerca hanno evidenziato come vi sia stato un minore sviluppo vegetativo delle piante in pieno campo rispetto alle serre, con differenze anche nell’ambito di queste ultime in funzione del tipo di film. I film fotoselettivi hanno indotto la più elevata attività vegetativa e tra questi soprattutto il film GREEN4%. Tra i fotoluminescenti, il RED è stato il materiale che ha stimolato di più lo sviluppo delle piante probabilmente per la sua capacità di assorbimento nello spettro dell’UV e riemissione nella banda del rosso, ritenuta molto efficiente dal punto di vista della fotosintesi.