Trend debljinskog prirasta crnog bora u kulturama na području Raške
Diameter increment trend of the Austrian pine plantations in Raška
Izvod: U radu su izneti rezultati istraživanja višegodišnjeg trenda debljinskog prirasta stabala srednjedobnih kultura crnog bora. Starost kultura je 35-55 godina, a bonitet staništa I-V. Analiziran je uticaj klimatskih faktora i proreda na veličinu i tok debljinskog prirasta. Obuhvaćen je vremenski period od 1988. do 2009. godine. Utvrđeno je da postoji statistički značajna zavisnost debljinskog prirasta stabala od količine padavina, dok je zavisnost od temperature vazduha i izvedenih proreda slučajna. Količina padavina u vegetacionom periodu odražava se direktno na veličinu debljinskog prirasta, a temperatura vazduha i prorede indirektno. Prorede u izvesnoj meri ublažavaju negativne efekte ekstremno niskih padavina i visokih temperature vazduha na debljinski prirast. Ovi odnosi su najjasnije izraženi u analizi debljinskog prirasta dominantnih stabala.
Abstract: This paper presents the results of the research of the multi-annual trend of the diameter increment of the trees of the middle-aged Austrian pine plantations. The age of the plantations ranges from 35 to 55 years, and the site classes from I-V. The impact of the climate factors and thinning on the trend of the diameter increment for the period 1988-2009 was analyzed. The statistically significant dependence of the diameter increment on the quantity of precipitation was determined, whereas the dependence on the air temperature and thinning is random. The quantity of precipitation over the vegetation season is directly reflected in the diameter increment, whereas the air temperatures and thinning are reflected indirectly. The thinning partially alleviates the adverse effects of the extremely low precipitation and high air temperatures on the diameter increment of the dominant trees. These relations are most clearly expressed in the analysis of the diameter increment of the dominant trees.
engleski
2009
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Ključne reči: kulture, crni bor, debljinski prirast, padavine, temperatura, prorede.
Key words: plantations, Austrian pine, diameter increment, precipitation temperature, thinning.