Galimybės cheminiais preparatais apsaugoti eglės (Picea abies (L) Karst.) kamienų žaizdas nuo medieną pūdančių grybų infekcijos

Santr. angl., rusBibliogr.: 32 pavadVytauto Didžiojo universitetasŽemės ūkio akademij

Eglės (Picea abies (L.) P. Karsten), ąžuolo (Quercus robur L.) bei uosio (Fraxinus excelsior L.) žaizdas kolonizuojančių grybų populiacijų biologija ir reikšmė miško ūkiui : Habil. darbo santrauka, biomedicinos mokslai, (B 000), biologi

Santr. anglVytauto Didžiojo universitetasŽemės ūkio akademij

Spread of Stereum sanguinolentum vegetative compatibility groups within a stand and within stems of Picea abies

ibility groups within a stand and within stems of Picea abies. Silva Fennica 32(4): 301

Modulio AFAA 113, Augalų apsauga, 2 kr.( 16T, 32L, 32S) : Programa

Bibliogr.: p. 3-4 (17 pavad.)Vytauto Didžiojo universitetasŽemės ūkio akademij

Ąžuolynų apsauga nuo kenkėjų ir ligų

Vytauto Didžiojo universitetasŽemės ūkio akademij

Žvėrių sudarkytų miško želdinių ir pakenktų medynų inventorizavimas, atkūrimas ir ūkininkavimas : metodiniai nurodymai

Vytauto Didžiojo universitetasŽemės ūkio akademij

Clonality in the postfire root rot ascomycete Rhizina undulata

The aim of the present work was to investigate the potential for territorial and dispersive clonality in natural populations of the postfire root rot ascomycete Rhizina undulata. Population studies based on vegetative compatibility tests were done with strains isolated from individual sporocarps at five burned sites in three different localities (separated by 20-40 km) in the Curronian Spit of western Lithuania. Among a total of 103 strains, the tests identified 14 distinct vegetative compatibility groups (VCGs) of R. undulata, 13 of which were represented by 2-48 strains and three were encountered at 2-4 different sites. Occurrence on spatially separated sites of the same VCG of the fungus indicated a presence of dispersive clonality in R. undulata populations. On a local scale clusters of vegetative compatible sporocarps usually occupied discrete territories, implying territorial clonality. The two largest VCGs covered areas up to 7 and 3 m across. The results show that both dispersive and territorial clones are characteristics of natural populations of the fungus

Effects of thinning on growth of six tree species in north-temperate forests of Lithuania

This paper summarises the results from 35 years-observed thinning experiments on 256 permanent sample plots in 10-60 year-old stands of ash, aspen, birch, oak, pine and spruce in Lithuania. Thinning enhanced crown projection area increment of residual trees. The largest effect was observed in stands of aspen and birch (growth increase by 200%), followed by ash and oak (over 100%), and spruce and pine (about 80%). Thinning also promoted dbh increment, especially in younger stands, and the increase of dbh increment was positively correlated with the thinning intensity. The strongest reaction was exhibited by oak and aspen, while ash, birch and conifers reacted to a lower extent. Low and moderate intensities of thinning stimulated volume production in younger stands while the opposite was observed in older stands with increasing removals. Spruce stands exhibited relatively strongest increase of volume increment and pine, -the weakest, while the effect on deciduous species was intermediate. The results demonstrate that significant increase in volume increment is achievable with thinning of only young forest stands, e.g. 10-20 year-old pine, birch and ash, or 10-30 year-old oak, aspen and spruceVytauto Didžiojo universitetasŽemės ūkio akademij