Effect of different preparations for prolonged vase life of rose flower

Istraživanje trajanja rezanog cvijeta ruže u vazi provedeno je 2011. u laboratoriju Zavoda za bilinogojstvo na Poljoprivrednom fakultetu u Osijeku. Za potrebe ovog istraživanja korištene su ruže mirisne sorte Red Naomi nizozemskog proizvođača Schreurs uzgojene na OPG Maltar u Valpovu. Kao medij u pokusu korištena je obična voda iz slavine, Chrysal clear i gel Crystal soil. Srednja temperatura tijekom pokusa iznosila je 24,3ºC. Statističkom obradom podataka utvrđena je značajna razlika u trajanju rezanog cvijeta u vazi (vase life) u ovisnosti o mediju čuvanja rezanog cvijeta. Rezani cvijet ruže čuvan u Chrysal clear prosječno je trajao 11 dana, dok je rezani cvijet ruže čuvane u vodi trajao prosječno osam dana. Najmanje se dana očuvao rezani cvijet u gelu koji je propao nakon pet dana. Intenzitet transpiracije i gubitak tekućine u posudama u ovisnosti su jedan o drugome, kao i o mediju u kojem su biljke bile čuvane. Najveći intenzitet transpiracije utvrđen je kod rezane ruže čuvane u mediju Chrysal, a najmanji u gelu. Nakon petog dana pokusa na nekoliko stabljika ruža u gelu uočena je siva pahuljasta prevlaka te je izolacijom patogena utvrđeno da se radi o uzročniku sive plijesni Botrytis cinerea. Istraživanje ukazuje da primjena preparata Chrysal, koji sadrži glukozu, biocide i acidifere, utječe na trajnost cvijeta ruže i produžava život cvijeta u vazi (vase life), isto tako gel nepovoljno utječe na čuvanje rezanog cvijeta ruže.The research of cut rose flower vase life was conducted in the laboratory of the Department of Crop Production, Faculty of Agriculture in Osijek. For the needs of this research there were used roses of fragrant cultivar Red Naomi of the Dutch producer Schreurs cultivated at the family farm Maltar in Valpovo, Croatia. As the medium in the experiment there was used regular tap water, Chrysal clear and Crystal soil gel. Mean temperature during the experiment was 24.35°C. Statistical data analysis determined a significant difference in cut flower vase life depending on the medium for keeping a cut flower. Cut rose flower kept in Chrysal clear was fresh for 11 days on average, whereas cut rose flower kept in water was fresh for 8 days on average. Cut rose flower kept in gel had the shortest vase life of 5 days. Transpiration intensity and loss of fluid in pots were interdependent and also depend on the medium for keeping flowers. The highest transpiration intensity was determined with cut rose flower kept in Chrysal medium, and the lowest in gel. After the 5th day of the experiment there was noticed a gray flaky coating on few rose stalks, so pathogen isolation determined that it was the causative agent of gray mold, Botrytis cinerea. The research indicates that the application of the preparation Chrysal, which contains glucose, biocides and acidifiers, affects the viability of rose flower and prolongs the vase life. Also, gel influences unfavorably the keeping of cut rose flower