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- W2078255783 abstract "Abstract Observations on needle length and longevity of Pinus pinea L. - We investigated needle length and longevity of Pinus pinea L. to understand their ecological significance. Samplings regarded five coastal pinewoods (four in the province of Grosseto, one in the province of Lucca) and isolated trees in different sites of Tuscany. We found a significant variation in needle length among different positions of the crown (central, intermediate and peripheral), among individuals of the same site and among different sites; isolated trees showed longer needles and a longer retention than pines in stands. We also obtained a highly significant linear regression between length of different-aged needles (from 1988 to 1992) and rainfall of the period march-august of the same years. Our results suggest that, despite its high variability, needle ength is influenced by climatic conditions (overall by rainfalls) and by the water availability of the site where pines grow. Needle retention depends largely on the position of needles within the crown and on the drought effect: at the upper position, three or, seldom, four-year old needle can persist if the summer drought period is not too long and the site conditions are favourable; at the lower level only two-year old needles are retained. Needle longevity decreases sharply in years with severe drought, therefore it can be used as an index of climatic and edaphic stress." @default.
- W2078255783 created "2016-06-24" @default.
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- W2078255783 date "1994-01-01" @default.
- W2078255783 modified "2023-09-25" @default.
- W2078255783 title "Osservazioni sulla lunghezza e sulla longevità degli aghi di pino domestico (Pinus pinea L.)" @default.
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- W2078255783 doi "https://doi.org/10.1080/11263509409430313" @default.
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