DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 9-10/1995 str. 46 <-- 46 --> PDF |
J. Sikora: POTRAJNOST I PRIRODNO OBNAVLJANJE ŠUMSKE VEGETACIJE POPLAVNOG PODRUČJA Šumarski lisl br. 9—10, CXIX (1995), 323-328 LITERATURA Bezak. K., Cestar, D., Hren, V., Kovačević, Z., Martino-Rauš, D., Matič, S., 1990: Vegetacijska i uzgojna istraživanja u GJ vić, J., Pelcer, Z., 1989: Uputstvo za izradu karte ekološko-"Vukovarske dunavske ade" PJ Vukovar. Šumarski list br. 1—2/ gospodarskih tipova brdskog i nizinskog područja (II) SR Hrvat90. Zagreb. ske. Šumarski institut Jastrebarsko, Radovi br. 79. Zagreb. Regent, B., 1972: Šumsko sjemenarstvo. Zagreb. Harapin, M., Vrataric, P., Vukelič, J., Bićanič, V., 1993:Za-Sekawin, M., 1975: Genetika bijele topole. Anali za šumarstvo 6/6. Za štita i očuvanje europskih šuma. Ministarstvo poljoprivrede i šugreb. marstva i J. P. "Hrvatske šume". Zagreb. Sikora, }., Lovaš, O., Jelčić, K., Starčevič, T., 1992: 19.-to zasjedanje Internacionalne komisije za topole (Izvješća Herpka, I., 1968: Ekološke i biološke osnove autohtonih topola i vrba u stručnjaka JP "Hrvatske šume" s nekih međunarodnih skupova u ritskim šumama Podunavlja. Doktorska disertacija. Zagreb. svijetu tijekom 1992. godine). Zagreb. Krstinič, A., Kajba, D., 1994: Conservation of poplar and arbore Škorič, A., 1986: Postanak, razvoj i sistematika tala. Zagreb. scent willow genetic resources in Croatia. Izmir (Turska). Zsuffa, L., 1964: Genetika crne topole. Anali za šumarstvo 6/2. Zagreb. Majer, Ž., 1994: Ritske šume Hrvatskog podunavlja i njihova prirodna Weber, E., 1974: Genetika vrste Salix alba L., Spec, plant. Anali za šu obnova. Glasnik za šumske pokuse br. 31. Zagreb. marstvo 6/1. Zagreb. Rauš, D., 1987: Šumarska fitocenologija. Zagreb. JP "Hrvatske šume", 1993: Program razvoja 1991—2025. god. Zagreb. Rauš, Đ., 1992: Vegetacija ritskih šuma uz rijeku Dravu od Varaždina do Osijeka s težištem na Varaždinske podravske šume. Glasnik za šum Službeni list Republike Hrvatske, 1990: Zakon o vodama. Narodske pokuse br. 28. Zagreb. ne novine 53. Zagreb. SUMMARY: The appearance of natural germinated seeds is the basis for preservation of heredity, natural heterogeneity and stability of broadleaved forests of poplar and willow in a flooded area. The emerging of germs from seeds is a specific natural phenomenon connected with the formation of river deposits along the banks or at the eyots formed on the riverbeds. Germination is conditioned by the height of the water level, climatic conditions at the time of spontaneous seed dissemination and by the duration of its germinative capacity. Survival of the germinated seed and consequent growth of the young stands, in particular during the first years of growth, depends to a large degree on the water regime. This sequence of events, including the consequent development of full-grown high spermatophytic trees, represents the progressive developmental course in the forest vegetation of this region. Because of the meandering of rivers and riverbed shifting full-grown stands are often "removed" from the watercourse. Due to the deposititon of the flood material the ground level is consederably higher than it was during formation of the stand. After the felling of forest decline (windfalls, calamities) of these stands a new generation is created primarily from the stumps and roots, to a lesser extent individually, or in groups, by the spontaneous seed dissemination of other species. This is the begining of the regression of spermatophytic poplars and willows, which further develops towards degradation or succession to other vegetational forms. Key words: germinated seed, hereditary basis, deciduous forests of poplar and willow, seed, spermatophytes, vegetation, progression, degradation, succession. |