Loading...
Paper

Written Paper

Lietuvos misku bukles monitoringas: 1988-1995.  [1996]

Ozolincius R. Stakenas V Lithuanian Ministry of Forestry (Lithuania). Lithuanian Inst. of Forestry. [Corporate Author]

Access the full text

NOT AVAILABLE
In 1988 forest monitoring network (grid size 4x4 km) including more than 960 permanent observation plots (POP) and more than 23 thou. sample trees was established in Lithuania. In 1992-1995 the number of POP and sample trees have been reduced. The mean defoliation of all species (22-24) has not been increasing during the past 2-3 years, whereas the significant defoliation increase (t-test has been used) was started in 1989-1991. Various tree species can be ranked according to the mean defoliation as follows (forest monitoring data, 1995): ash (Fraxinus excelsior)- mean defoliation 16.1, black alder (Alnus glutinosa)-17.4, birch (Betula sp.)- 20.5, grey alder (Almus incana)-22.9, aspen (Populus tremula)-23.6, Scots pine (Pinus sylvestris)- 24.0, oak (Quercus robur)-25.5, Norway spruce (Picea abies)-28.6.