Evaluation of gerbera varieties in soilless culture [Gerbera jamesonii Hook.]

coltura senza terra colture in serra crop yield cultivo sin tierra cultivos de invernadero culture sans sol cut flowers ensayos de variedades fiori recisi fitomejoramiento flor cortada gerbera greenhouse crops growing media miglioramento genetico vegetale plant breeding plante de serre prove varietali rendement des cultures rendimiento de cultivos repiquage soilless culture substrat de culture substratos de cultivo transplanting trapianto trasplante variedades varieties variety trials