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Abstract

Structure, quality, production, LAI and dendrochronology of 100 years old Austrian pine (Pinus nigra Arnold) stand.

Abstract

This paper evaluates the growth, structure, production, quality, leaf area index and dendrochronology of a 100-year old Austrian pine (Pinus nigra Arnold) monoculture situated in the forest type group Fageto-Quercetum in the locality Horné Lefantovce (Nitrianska Streda Forest District, Topol'čianky Forest Enterprise), Slovakia. Codominant trees, trees with stem of high quality, with medium-sized crown, medium dense and straight crown are the most abundant in the stand. The number of trees in the stand is 1024 trees/ha, the basal area is 51.75 m2/ha, the growing stock is 571.56 m3/ha, the aboveground biomass stock is 348.76 t/ha and the leaf area index is 21.85 ha/ha. Dendrochronological analyses examined the response in individual sample trees and minimum annual ring width was found in 1920, 1922, 1925, 1929, 1933, 1938, 1944, 1946, 1947, 1949, 1952, 1954, 1963, 1968, 1976, 1982, 1990, 1993, 1998, and 2001. Marked maximum values of annual ring width in the years 1919, 1923, 1926, 1930, 1936, 1937, 1941, 1948, 1951, 1955, 1959, 1966, 1972, 1975, 1980, 1985, and 1997 were found as a positive productive feature. Beginning 1993, dry Austrian pine trees occurred in the stand as a result of the fungal infection by Sphaeropsis sapinea.