SVIBOR - Project code: 4-04-099


Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69


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Project code: 4-04-099

Forest cultures, protection and regeneration of the damaged stands

Main researcher: KOMLENOVIĆ, NIKOLA (21896)

Type of research: basic
Duration from: 01/01/91. to 12/31/94.

Papers on project (total): 131
Papers on project quoted in Current Contents: 44
Institution name: Šumarski institut, Jastrebarsko (24)
Phone: 385 (0)1-83-10-22
Fax: 385 (0)1-83-14-93

Summary: During the research period 166 stands has been selected and 65 management programmes for seed stands are worked out. It has been stated in the experiments that the application of the corresponding substrata, mineral fertilizers and pesticides and cultivation of plants in plastic houses can considerably reduce the production cycle of seedlings and improve their quality. Detailed pedological, sylvicultural and plant-nutritional researches for the establishment of new cultures have been carried out on 550 ha. Categorization of forest soils was carried out in Podravina, Varaždin region. Research results have shown that the appropriate choice of tree species, methods of establishment, spacing and the application of regular silvicultural and control measures can significantly influence the growth of cultures. Better results were achieved in experiments with local provenances of common oak and with domestic provenances of Norway spruce and Scotch pine results are poorer. Within the framework of the EU an international experiment comprising 49 Beech provenances, has been established. Among foreign provenances, Sudetic larch, Douglas fir from Washington state and Eastern White pine from Croatia are the best. Research results indicate to intensive soil desiccation in lowland forests of Pokuplje and Posavina. In Varoški Lug and Turopoljski Lug dieback of Pedunculate Oak has been caused primarily by the lack of moisture in the soil as a consequence of drainage canals and several arid years. Considerable increase of sulphur in assimilation organs of forest trees has been determined in the surrounding of SO2 sources (Plomin, Rijeka-Bakar, Zagreb). Further away from SO2 sources, particularly in regions of northern and western Croatia, imission soil acidification and significant introduction of lead and other heavy metals into forest soils on many locations was found. Partyculary high quantities of heavy metals are introduced into soils of lowland forests by polluted flood waters. Seed quality and nutritional state have been deteriorating in direct proportion with tree-crown damage in the Fir and Spruce. Defoliators often cause leaf area reduction.

Keywords: seed, forest cultures, provenances, pollution, water regime, intergrated pest control

Research goals: -Choise, selection and management of seed stands, -New methods for controling seed quality, -New methods for seedlings production, -Finding of appropriate substratum and mineral nutrients applications, -Weed, plant disease and pest control in forest nurseries, -Methods forest cultures establishment, -Finding the most favourable species and provenances of domestic and foregin tree species, -Investigating the basic genetic properties of the Beech in Europe, -Selection of sites for forest cultures establishment, -Categorization of alluvial soils for reforestation of damaged stands, -Impact of density on biomass production, -Determination of the relation of tree-crown damage of Fir and Spruce, state of nutrition and seed quality, -Impact of underground and surface waters regime, pollutants and biotic factors on the forest ecosystem stability and finding measures for the prevention of forest decline.


  1. Name of institution: Šumarski fakultet Sveučilišta u Zagrebu
    Type of institution: University/Faculty
    Type of cooperation: Systematic exchange of information
    City: 10000 - Zagreb, Croatia

  2. Name of institution: "Hrvatske šume", Javno poduzeće za gospodarenje šumama i šumskim zemljištima R. Hrvatske
    Type of institution: Economical/Production
    Type of cooperation: Systematic exchange of information
    City: 10000 - Zagreb, Croatia


  1. Name: Mediteranean Forest Trees - A Guide for Crown Assessment
    Type of achievement: Other
    Authors: Mediterranean Experts Group (Komlenović, N., etc) CEC-UN/ECE

  2. Name: Forest Condition in Europe Results of 1993. Survey
    Type of achievement: Other
    Authors: CEC-UN/ECE (Komlenović, N.)

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Last update: 10/13/95