OVERWINTERING OF SOME HARDY IRIS SPECIES IN AGROBOTANICAL GARDEN UASVM CLUJ-NAPOCA
Abstract
In this study conducted in two winter seasons on eight Iris species of hardiness
seven from Agrobotanical Garden UASVM Cluj-Napoca, by exploring the link between temperature and senescence it was shown that this factor affects differently the iris species in relation to leaf senescence onset and progression. It was observed that temperature variation from one studied overwintering interval to another seems to cause a stronger response in some semievergreen species (I. pallida, I. orientalis). Climatic data from last five winters suggests that hardy
iris species that can withstand temperatures that reach -20°C and lower are best suited for Cluj County.
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