Primerjava različnih načinov redčenja v bukovih drogovnjakih : diplomsko delo - univerzitetni študij

Triplat, Matevž (author), Diaci, Jurij (mentor), Roženbergar, Dušan (comentor)

Globalizacija trga je pripeljala do velikega razmaka med stroški dela in ceno lesa. Iskati je potrebno nove poti do vzgoje kakovostnejših dreves, ki še prinašajo ekonomski učinek. V sklopu diplomske naloge je bilo preverjeno, kakose novi gozdnogojitveni modeli, razviti v tujini, odzivajo pri nas. Raziskovalne ploskve so bile osnovane leta 2005 v sklopu projekta "Razvoj in preverjanje alternativnih modelov nege gozdov ob upoštevanju sodobnih tehnologij pridobivanja lesa". Izbrane so bile 4 ploskve na lokaciji Medvednica. Ploskvam so bili določeni različni gozdnogojitveni tretmaji, ki so se razlikovali po številu izbrancev in jakosti ukrepanja. Izvedena je bila druga serija popisa izbrancev, kjer so popisovali 20 karakternih znakov, ki bi vodili do novih spoznanj, opravljena pa je bila tudi meritev svetlobnih razmer s hemisferno fotografijo. Značilnost razlike med premeri, ki bi bili posledica različnega ukrepanja, so skušali dokazati z analizo kovariance, a razlik niso potrdili. Bolj značilno so se razlike med gozdnogojitvenimi tretmaji kazale pri analizi višinskega prirastka in površine krošnje. Ugotovljene so bile določene prednosti novih modelov redčenja, saj so se v močno redčenih sestojih z nizkim številom izbrancev (170 izbrancev na hektar) izbranci odzvali s povečano višinsko rastjo, površino krošnje in s povečano dolžino čistega debla, ki je za kakovost najbolj pomembna. Upoštevati je potrebno, da so bili rezultati preliminarni zaradi kratkega časovnega razdobjain dejstva, da raziskava ni bila ponovljena.

• Language: Slovenian
• Keywords: redčenje, nega gozdov, bukovi gozdovi, drogovnjaki, biološka racionalizacija
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [M. Triplat]
• Year: 2010
• Number of pages: VIII, 49 f.
• PID: 20.500.12556/RUL-15927
• UDC: 630*24(043.2)=163.6
• COBISS.SI-ID: 3057574
• Publication date in RUL: 11.07.2014

Secondary language

• Language: Unknown

Abstract

Globalisation led to a dramatic decline in economic return for timber due to low timber prices at constantly increasing labour cost. The key is to find forest management techniques leading to higher stem quality ensuring positive economic effects. The scope of the diploma thesis was to examine response of selected new forest management techniques developed abroad to local conditions. The research plots were established on Medvednica in 2005 as part of a project "Development and testing of alternative forest tending models in relation to modern timber extraction methods" - four plots were considered forthe analysis. Each plot was assigned a different type of forest growth treatment which differentiated in number of crop trees and intensity of pruning. A second series of measurements collecting twenty characteristic signs of crop trees was completed together with hemispherical photography to study light environment. Analysis of covariance could not confirm any significant difference in stem diameter as a consequence of different forest growth treatments. The differences were more significant for height increment and crown base. Some advantages of new pruning models were found; for example on a plot with low crop tree number (170 crop trees per hectare) the crops achieved larger height increments, larger crown base and also longer length of tree trunk which is the most important factor for timber quality. We must bear in mind however that presented results are preliminary due to a short research period and the fact that the research did not include any repetition.