Serbian spruce (Picea omorika (Panč.) Purk.) represents a potential and not really widely used alternative to the Norway spruce (Picea abies (L.) H. Karst.). This research was conducted on a Serbian spruce plantation, located just under the top of a hill called Počivalnik, between Unec and Postojna. The trees were planted in 1988 and are currently classified as pole stands. We've measured tree diameters and assessed the health condition of each tree systematically throughout the plantation. Data processing consisted of calculating percentages of trees of each health contition for every provenance and phenotype present in the plantation, making a model of the plantation, analysis of variance and Tukey's post hoc test. We've realised that the provenances affect health condition, but not tree diameter. Phenotypes affect both. The correlation between phenotype and tree diameter is significant within phenotypes B (variety 'semidichotomy') and C (variety 'serbica'). Also, the affect of phenotypes on diameter increments varies between provenances. According to our research, this environment best suits the trees from the provenance called Šargan (read Shargan). Phenotypewise, C and F (type 'argentea') appear to be best suited. Those phenotypes are also the most desirable for use in horticulture; C for it's typical narrow crown, and F for the silvery appearance of it's crown.
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