Growth and flowering response of Euphorbia x lomi Poysean cultivars under different irrigation regimes
Fascella, G.; Agnello, S.; Maggiore, P.; Zizzo, G.V.
International Symposium on High Technology for Greenhouse Systems - GreenSys 2009, Quebec City (Canada), 14-19 giugno. Book of abstracts
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A one-year pot-cultivation trial of two Euphorbia x lomi Rauh Poysean hybrids with different irrigation regimes was carried out with the aim to evaluate plant response to drought and to define a growing protocol with limited water resources. Plants of the cultivars ‘Nam Chok’ and ‘Udom Sab’ were grown under greenhouse in plastic pots filled with an organic mixed substrate. Two water regimes were applied: plants daily irrigated when substrate matric potential reached 10 kPa to 100% of container capacity (Control); plants daily irrigated when matric potential was 30 kPa to 100% of container capacity (Deficit). Irrigation regime influenced plant growth and characteristics: plants with deficit irrigation resulted higher and with more inflorescences than control plants; no differences were recorded as regards the other ornamental traits. Deficit plants also resulted in higher top and root dry weight than Control plants. Tested cultivars differed for most of the considered parameters except for trunk diameter and length of inflorescences.