DIGITALNA ARHIVA ŠUMARSKOG LISTA
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D. Ugarković, I. Tikvić, M. Oršanić, Z. Seletković, I. Seletković, M Blažinkov, M. Mrkonjić Fuka, S Redžepović: NEKE ... Šum. list br. 3–4, CXXXV (2011), 99-111 Tikvić,I., 2001: Mikrobiološka aktivnost tla i miko-Vasilj,V., S.Redžepović, M.Bogunović, K. riza u jelovim šumama. U: Prpić, B. (ur.), Obična Babić, S. Sikora,2007: Mikrobiološke kajela (Abies alba Mill.) u Hrvatskoj, Akademija rakteristike različitih tipova tala zapadne Hercešumarskih znanosti i “Hrvatske šume”p.o. Za-govine.Agronomski glasnik 6: 425–444. greb, Zagreb,277–279. Vukadinović, V., Z. Lončarić, 1998: Ishrana Tikvić, I., 1996: Mikrobiološka istraživanja tala u bilja. Sveučilište Josipa Jurja Strossmayera u različitim stanišnim i strukturnim prilikama bu-Osijeku, Poljoprivredni fakultet Osijek, 293 str. ko vo-jelovih šuma Hrvatske. Magistarski rad, Wollum, A.G., 1982: Cultural methods for soil miŠu marski fakultet, Zagreb, 75 str. croorganisms. In: Methods of Soil Analysis, Part nd Trinajstić,I., 2001: Rasprostranjenost, morfologija 2: Chemical and Microbiological Properties. 2 i taksonomija jele u Hrvatskoj. U: Prpić, B. (ur.), edition, American Society of Agronomy, Inc., Obična jela (Abies albaMill.) u Hrvatskoj,Aka-Soil Science Society ofAmerica, Inc., Madison, demija šumarskih znanosti i “Hrvatske šume”, Wisconsin. Pp. 781–802. p.o.Zagreb, Zagreb, 93–102. Zogg, G. P., D. R. Zak, K. S. Pregitzer,A. J. Ugarković,D., 2009: Utjecaj stanišnih i strukturnih Burton,2000: Microbial immobilization and čimbenika na odumiranje obične jele (Abies alba the retention of antropogenic nitrate in a nort- Mill.) u Gorskom Kotaru. Disertacija, Šumarski hern hardwood forest. Ecology, 81: 1858–1866. fakultet, Zagreb, str. 200. SUMMARY:Silver fir (Abies albaMill.) is the most damaged forest tree species in Republic of Croatia. As a result of changes in natural biotope factors tree degradation and sudden decline is manifested. Intensive tree decline leads to canopy degradation and creating smaller or larger forest gaps. These advents cause changes in microclimatic and microbiological conditions, and regeneration problems. Researchers are carried out in Gorski kotar, in beech- fir and fir forest areal. The main aim of this research was to determine changes in chemical and microbiological composition of forest gap soil, and natural regeneration within gaps. Chemical and microbiological analyses of forest soil were done. Soil microbiological analyses included determination of total fungi and bacteria count, and presence of microorganism functional groups. According to chemical parameters higher values were found in control plots (canopy) than in large forest gaps. Exception was small forest gap where values of chemical variables were higher than in corresponding control plot (table 2). In large beech-fir forest gap was found smaller number of asymbiotic nitrogen fixators and cellulose decomposition fungi than in control plot (table 3). Small forest gap in beech-fir forest had higher value of individual soil functional microorganism groups than corresponding control plot, except cellulose decomposition fungi. The highest soil biogenity was found in small forest gap (table 4). In large fir with hard fern forest gap regarding control plot was found significantly smaller total fungi count and amount of cellulose decomposition fungi (table 5). Comparing gaps between themselves total fungi count in O1 and O2 beech-fir forest gaps was significantly higher than in O3 fir with hard fern gap. Amount of asymbiotic nitrogen fixators and ammonia forming bacteria was significantly the highest in small gap O2, then in large gap O1 in beech- fir forest, and the lowest in O3 fir with hard fern forest gap (table 6). Amount of asymbiotic nitrogen fixators, cellulose decomposition fungi and ammonia forming bacteria was significantly higher in beech-fir forest than in fir with hard fern forest (table 7). |