Olive flowering was monitored in 15 monitoring stations located in four south-Italy regions (Campania, Calabria, Puglia and Sicily) representing about the 90% of national olive territories. The flowering phenophase has been studied through the pollen emission monitoring realized utilizing scientific instruments which capture defined volumes of atmoshpere and which permit us to know the pollen emission trends determining daily average pollen concentrations (pollen grains/m3). The combined analysis of pollen monitoring and meteorological data permitted to determine firstly a group of stations characterized by the fact that the better relationships between reproductive structure development and Growing degree days were obtained using low spring threshold temperatures (7-10° C). This first group is constituted by 4 stations (Benevento, Avellino, Salerno and Cosenza) located on Appenninic mountains those coldest of the entire monitoring database. Probably in theses areas the cultivated olive cultivars need lower temperatures to start their awakening processes to develop the reproductive structures. A second group of stations is characterized by higher threshold temperatures (11- 14° C) where the olive cultivars evidenced thermal requirements typical of warm mediterranean areas. The stations of this group are above all those located in Sicily and Puglia. The scientific instrument utilized to monitor flowering phenomenon permit to show “recent” climatic trends furnishing useful information about the relationships plant-climate.
Il ruolo delle temperature primaverili sull'evento fioritura in olivo ed elaborazione delle soglie di "risveglio" degli apparati riproduttivi
FORNACIARI DA PASSANO, Marco;ORLANDI, Fabio;SGROMO, CARLO;BONOFIGLIO, TOMMASO;RUGA, LUIGIA;ROMANO, Bruno
2010
Abstract
Olive flowering was monitored in 15 monitoring stations located in four south-Italy regions (Campania, Calabria, Puglia and Sicily) representing about the 90% of national olive territories. The flowering phenophase has been studied through the pollen emission monitoring realized utilizing scientific instruments which capture defined volumes of atmoshpere and which permit us to know the pollen emission trends determining daily average pollen concentrations (pollen grains/m3). The combined analysis of pollen monitoring and meteorological data permitted to determine firstly a group of stations characterized by the fact that the better relationships between reproductive structure development and Growing degree days were obtained using low spring threshold temperatures (7-10° C). This first group is constituted by 4 stations (Benevento, Avellino, Salerno and Cosenza) located on Appenninic mountains those coldest of the entire monitoring database. Probably in theses areas the cultivated olive cultivars need lower temperatures to start their awakening processes to develop the reproductive structures. A second group of stations is characterized by higher threshold temperatures (11- 14° C) where the olive cultivars evidenced thermal requirements typical of warm mediterranean areas. The stations of this group are above all those located in Sicily and Puglia. The scientific instrument utilized to monitor flowering phenomenon permit to show “recent” climatic trends furnishing useful information about the relationships plant-climate.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
