engleski

GROWTH OF DOUGLAS FIR PROVENANCES (PSEUDOTSUGA MENZIESII (MIRB.) FRANCO) IN CENTRAL CROATIA

Douglas fir is one of the most productive and in economic terms the most interesting species of forest trees in the USA. Due to its wide ecological valence and adaptability, this species was introduced in Europe in the first half of the 19th century. European foresters very attentively studied its numerous provenances being aware of the fact that knowledge of the growth of an individual species is crucial when introducing it in areas out of its natural distribution. In Croatia the afforestation drive in the 60s of the last century gave rise to an ever increasing interst in douglas fir.Trials of various provenances of douglas fir are established in non-forest areas in order to examine the growth of individual provenances in various stand conditions of the Republic of Croatia as well as to find adequate provenances for our region (fast growth and increment, good quality, resistance to diseases etc.). In this paper we are going to report on growth results of 12 and 14 provenances of 37 year old douglas fir in field trials Paulinovac and Slatki potok (Central Croatia). Local provenance Buzet (S) is better than the average of all the provenances. Among the original North American provenances those belonging to the coastal area of the Federal State of Washington from lower heights above sea-level are considered to be the best.

Douglas fir; provenances; central Croatia

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