Influence of salvage cutting on management of forest by tender silvicultural systems

anglais. The objective of the paper is evaluation of the influence of salvage cutting in forest user's unit on management ofthe forest. For mutual comparison the analysis of two time periods was made. The first one is the period of validity of forest management plan 1988-1997 and the second one is at present time valid forest management plan 1998-2007. The ratio of salvage cutting oftotal realized final cut was found out. In both evaluated periods almost 50 % of salvage cutting was observed. Obtained cutting data where summarized within the production forest in chosen management sets of forest vavs from 6th altitudinal zone where final cut was prescribed and realized. It is the solution of the problems of mountain forest. Lower rate of realized cut than planned final cut in period 1988-1997 was influenced by salvage cutting. Some of planned final cuts where not realized. It negatives resulted in forest stands with prescribed shelterwood cut. High rate of salvage cutting is also in the first 4 years of period 1998-2007. The conception tends to more tender silvicultural systems. To decrease rate of salvage cutting and to make better forest stands state in the future some arrangements were suggested.

slovaque. Cielom tejto prace bolo zhodnotenie vplyvu nahodnych tazieb v LHC na obhospodarovanie lesa. Pre vzajomne porovnanie sa vykonal rozbor v dvoch casovych obdobiach, a to za obdobie platnosti lesneho hospodarskeho planu 1998-2007. Zistil sa podiel nahodnych tazieb z celkovej vysky realizovanej obnovnej tazby. V obidvoch analyzovanych obdobiach dosahovala vyska nahodnej tazby takmer 50 %. Ziskane udaje o tazbach sa spracovali v ramci kategorie hospodarskych lesov z vybranych hospodarskych suborov lesnych typov 6. vegetacneho stupna, v ktorych bola predpisana a realizovana obnovna tazba. Jedna sa o riesenie problematiky horskych lesov. Vplyvom realizacie nahodnych tazieb bol etat za sledovane obdobie 1988-1997 nizsi ako planovany. Niektore umyselne tazby neboli zrealizovane, co sa negativne prejavilo v porastoch s predpisanou clonnou obnovou. Vysoky podiel nahodnej tazby je aj v prvych 4 rokoch evidovaneho obdobia 1998-2007. Koncepcia tazieb vsak smeruje k jemnejsim sposobom. Pre znizenie podielu nahodnych tazieb a tym zlepsenie stavu porastov boli do buducnosti navrhnute niektore opatrenia.