科研之友
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摘要
The plant adaptation to climate trends appears as a main research field in the recent past. In the Mediterranean environment a 14-year (1997-2010) phenological study was realized inside a phenological garden to investigate the climate/plant relationships. The average phenological data thus obtained provide a mean model of development for the different species in relation to the 14-year period of observation (1997-2010). Meteorological recordings showed June and July as the months with the highest temperature increases during the central period of the study period. The phenological data showed a double-trend behaviour during the historical series considering the first two growth phases (V3, V5) that was not seen for the later phases (V7, V8). Moreover, different leaf presence periods on the tree were calculated for some of the plant species, and commonly the clearest trends were seen for V3 to V7 with a decreasing period length from 1997 to 2002-2003 and a successive quite constant behaviour. The lowest correlations between annual vegetative phases and temperature variations were manifested above all by two species (Sambucus nigra L. and Robinia pseudoacacia L.) for which the first leaf development phases appeared probably influenced by photoperiod.
- 出版日期2014
- 单位Perugia
