Miletić, Zoran Topalović, Milun Čokeša, Vlado All rights reserved application/pdf 3300884 bytes info:eu-repo/semantics/article Institut za šumarstvo srp Zbornik radova Instituta za šumarstvo number: 48-49 startpage: 44 endpage: 54 https://unilib.phaidrabg.rs/o:6556 cobiss:COBISS.SR-ID 27739138 ISSN: 0354-1894 Na dva ogledna polja na Torničkoj Bobiju, u kulturama jele i smrče starosti 30 godina i u susednim bukovim sastojinama ispitivan je sadržaj najvažnijih makroelemenata ishrane. Konstatovano je da je promenjen karakter organske materije, koja dospeva na površinu zemljišta, i promenjen bilans kruženja hranljivih materija u veštački podignutim ekosistemima rezultirao smanjenim proizvodnim potencijalom zemljišta na oba ogledna polja. The contents of the most important plant nutrition macro-elements was researched on two sample plots of Tornicka Bobija in fir and spruce plantations aged 30 years and in the adjacent beech stands. It was concluded that the character of the organic matter reaching the soil surface was changed and that the changed balance of nutrient cycling in artificially established ecosystems resulted in the reduced production potential of the soil in both sample plots. PROMENE SADRŽAJA PRISTUPAČNIH OBLIKA NAJVAŽNIJIH BIOGENIH ELEMENATA U ZEMLJIŠTU POSLE SUPSTITUCIJE BUKOVIH SASTOJINA SMRČOM I JELOM biogeni elementi, zamena vrsta, bukva,jela, smrča, distrični kambisol. biogenic elements, substitution of species, beech, fir, spruce, dystric cambisol. 2003