Thriving of Serbian spruce (Picea omorika (Pančić) Purkyne) on a plantation near Postojna

Abstract

Omorika (Picea omorika (Panč.) Purk.) predstavlja malo izkoriščen potencial. Namen raziskave je ugotoviti, kako primerna je za pogozdovanje kot morebitna alternativa navadni smreki (Picea abies (L.) H. Karst.). Raziskavo smo izvedli na nasadu omorike pod vrhom hriba Počivalnik med Uncem in Postojno. Drevesa so bila posajena leta 1988 in so zdaj v fazi drogovnjaka. Sistematično smo izmerili prsni premer in ocenili zdravstveno stanje vseh dreves. Izračunali smo deleže dreves različnih zdravstvenih stanj za posamezne provenience in fenotipe, izdelali model nasada ter izvedli analizo variance in post hoc test. Ugotovili smo, da imajo provenience velik vpliv na vitalnost dreves, ne pa tudi na debelinski prirastek. Vitalnost dreves se prav tako razlikuje med posameznimi fenotipi. V nasprotju s proveniencami korelacija med fenotipi in prsnimi premeri obstaja, natančneje, obstaja pri dveh od petih fenotipov (Bsorta \u27semidichotomy\u27, Csorta \u27serbica\u27). Ugotovili smo tudi, da je vpliv fenotipov na debelinski prirastek v različnih proveniencah različen. Glede na našo raziskavo je za to okolje najprimernejši semenski material provenience Šargan, najprimernejša fenotipa pa sta C in F (tip \u27argentea\u27). Omenjena fenotipa sta najbolj zaželena tudi v hortikulturi. Prvi zaradi vitke krošnje, značilne za to vrsto, drugi pa zaradi srebrnkastega videza krošnje.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\u27ve 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\u27s post hoc test. We\u27ve 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 \u27semidichotomy\u27) and C (variety \u27serbica\u27). 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 \u27argentea\u27) appear to be best suited. Those phenotypes are also the most desirable for use in horticultureC for it\u27s typical narrow crown, and F for the silvery appearance of it\u27s crown

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