Soil damage caused by mechanized cutting in regenerated stands in the Kočevski Rog area

Meritve za diplomsko nalogo so potekale avgusta, septembra in oktobra leta 2009 v kraju Podturn, krajevna enota Podturn, v gozdnogospodarski enoti Poljane. Namen naloge je bil analizirati in preučiti poškodbe tal na spravilnih poteh pri voţnji lesa z zgibnim polprikoličarjem, vlačenju lesa s traktorjem in sečnji s strojem za sečnjo ter podati oceno o primernosti izbire strojev na izbrani lokaciji. Raziskava je bila izvedena v dveh stratumih pribliţno enake velikosti. V enem stratumu je bila izvedena sečnja s strojem za sečnjo John Deere 1470D ECO v kombinaciji z motorno ţago, spravilo pa z zgibnim polprikoličarjem John Deere 1410 ECO III. Prečno na poti gibanja strojev je bilo postavljenih 34 profilov, na katerih smo spremljali spremembe oblike profila. V drugem stratumu pa je bil les posekan z motornimi ţagami in izvlečen s prilagojenim kmetijskim traktorjem John Deere 6220. V tem stratumu je bilo postavljenih 21 profilov. V diplomskem delu so prikazani rezultati globine kolesnic za stroj za sečnjo, zgibni polprikoličar in traktor. Prikazane so tudi širine sečnih poti in motena površina na merjenih objektih. Ugotovili smo, da je bila pri večini merjenih profilov globina kolesnic niţja od 10 cm. Sečni ostanki so pri sečnji s strojem in spravilu ugodno vplivali na nosilnost gozdnih tal. Poškodbe tal so bile zaradi dobre nosilnosti tal zmerne. Stroj se je na izbrani lokaciji izkazal kot primeren.Measurements for the thesis took place in August, September and October 2009 in Podturn, the county Podturn, the forest management unit Poljane. The purpose of the thesis was to analyze and examine the damage done to the soil on skiding routes when transporting wood with forwarder, pulling logs with a tractor and woodcutting with tree harvester machine, and to make an assessment of the appropriate choices for choosing the machinery in the given location. The survey was conducted in two stratum of approximately equal size. In one location logging was carried out with the harvester tractor John Deere 1470D ECO in combination with a chainsaw, skidding it by a forwarder John Deere 1410 ECO III. Crosswise to the skidding, 34 profiles have been positioned, that monitored the routes. In the second location, the timber was cut by chainsaws and logged with adapted agricultural tractor John Deere 6220. In this stratum there have been 21 profiles. The paper presents the results of the rut depth of the harvester, forwarder and tractor. It also shows the width of the skidding routes and its interrupted surface of the measured objects. We have found that in the majority of the measured profiles the rut depth of less than 10 cm. Woodcutting residue by logging machines and harvesting have shown a positive impact on the capacity of the forest soil. Soil damage, due to good soil, were moderate. The machine at the selected location has proved to be suitable