61 KB1508 KB52 KB193820252010Mikoš, MatjažZorn, Matijaletnik:68številka:7/8str. 361-366, 379-392ISSN:0017-2723COBISSID:31783213URN:URN:NBN:SI:doc-IZ2Q97X5slZveza društev inženirjev in tehnikov gozdarstva in lesarstva SlovenijeGozdarski vestnikDragonjaerozija prstierozijski procesiIstraIstriapedogeografijaSloveniaSlovenijaMeritve površinske erozije tal v gozdu Slovenske Istre| Soil erosion measurements in a forest in Slovenian Istria|In order to assess protection role of forests we performed measurements of interrill soil erosion under three different land uses in Slovenian Istria between 2005 and 2008, namely on bare soils in a young olive grove, on a grassland under overgrowth, and in a forest. The measurements were performed south of the village of Marezige in the Rokava River catchment on eight close derosion plots of 1 m2 area. In the first year of measurements (May 2005 through April 2006), soil loss due to the surface erosion on bare soils in the olive grove with the slope of 5.5? amounted to 9013 g/m2 (90 t/ha), on the grassland under overgrowth with the slope of 9.4? it amounted to 168 g/m2 (1.68 t/ha), in the forest with the slope of 7.8? it amounted to 391 g/m2 (3.91 t/ha), and in the forest with the slope of 21.4? it amounted to 415 g/m2(4.15 t/ha). These results show that soil detachment and soil erosion on natural land (forest, grassland under overgrowth) is much less ample compared to intensive agricultural use (olive grove). The measurements also showed that only a few large rainfall events caused the major part of the annual soil lossZa oceno varovalne vloge gozdov smo med letoma 2005 in 2008 v Slovenski Istri izvedli meritve površinskega spiranja na treh različnih rabah tal, tj. na golih tleh v mladem oljčniku, na travniku v zaraščanju in v gozdu. Meritve so potekale južno od vasi Marezige v porečju Rokave na osmih zaprtih erozijskih poljih velikosti 1 m2. V prvem letu meritev (maj 2005-april 2006) je površinsko spiranje na golih tleh v oljčniku z naklonom 5,5 st. znašalo 9013 g/m2 (90 t/ha), na travniku v zaraščanju z naklonom 9,4 st. 168 g/m2 (1,68 t/ha), v gozdu z naklonom 7,8 st. 391 g/m2 (3,91 t/ha) in v gozdu z naklonom 21,4 st. 415 g/m2 (4,15 t/ha). Rezultati kažejo na bistveno manjše sproščanje in odplavljanje tal na naravnih tleh (gozd, travnik v zaraščanju) v primerjav iz intenzivno kmetijsko rabo (oljčnik). Meritve so tudi pokazale, da je le nekaj večjih padavinskih dogodkov povzročilo večji del celoletnega spiranja in odplavljanja talTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaZveza gozdarskih društev Slovenije