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Ključne besede: monitoring, stanje gozdov, osutost dreves, poškodovanost dreves, rast dreves, meteorološke meritve, ozon, pritalna vegetacija, fenološka opazovanja, foliarni popis, zračne usedline
Objavljeno v DiRROS: 12.11.2024; Ogledov: 104; Prenosov: 0
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Povzetek: Sistematično spremljanje stanja gozdnih tal v Sloveniji od leta 1995/96 omogoča oceno osnovnih pedoloških lastnosti in spremljanje sprememb v času. Intenzivni monitoring na izbranih lokacijah pa od leta 2003 omogoča tudi oceno vzročno-posledičnih odnosov in spremljanje procesov v tleh. Analiza mineralnega dela tal (0–10 cm) kaže na razlike med ploskvami na različnih lokacijah v Sloveniji, spremembe talnih parametrov v času intenzivnega spremljanja znotraj posameznih ploskev pa se niso zelo spremenile. Opazili smo nekoliko povečanje organskega ogljika in skupnega dušika, medtem ko so vrednosti razmerja med organskim ogljikom in skupnim dušikom (C/N) ter pH tal ostale stabilne. Kljub razlikam med ploskvami so vrednosti ogljika in dušika ter njunega razmerja primerljive z vrednostmi iz evropske mreže 16 km × 16 km. Čeprav so opazne manjše spremembe v analiziranih lastnostih tal med obdobjema vzorčenja (2003–2010 in 2022), so trendi stabilni. Analiza stanja gozdnih tal na ploskvah sistema intenzivnega monitoringa kaže na manjše spremembe med prvim in drugim obdobjem vzorčenja. Kljub temu so trendi stabilni, kar kaže na logično povezanost dinamike ogljika in dušika v gozdnih ekosistemih. Nadaljnje aktivnosti intenzivnega spremljanja gozdnih tal so ključne za razumevanje procesov v tleh in opredelitev kazalnikov zdravega stanja tal v prihodnosti.
Ključne besede: gozdna tla, gozdna rastišča, ogljik v tleh, dušik v tleh, lastnosti gozdnih tal, spremljanje stanja
Objavljeno v DiRROS: 07.11.2024; Ogledov: 80; Prenosov: 30
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Ključne besede: monitoring, ogljik, gozdna tla, mokrišča, urbana tla
Objavljeno v DiRROS: 24.05.2024; Ogledov: 517; Prenosov: 365
Celotno besedilo (9,92 MB)
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Povzetek: The soil organic carbon (SOC) was determined in soils of enclosed karst depressions (dolines) (NW Dinaric Mts.) to define their potential for organic carbon sequestration. SOC was measured in the forest, succession (scrubland), and grassland plots at the bottom of dolines at four depths (0–40 cm) and for 40 cm soil layer SOC stock was calculated. We demonstrated that the prevailing fine soil fractions, the C/N ratio and soil thickness play a positive role in the storage capacity of SOC in dolines regardless land use type. Grasslands have the lowest SOC storage capacity (106 t/ha/40 cm), while the highest SOC storage capacity is in succession plots (130 t/ha/40 cm). The last are covered by shrub communities dominated by Prunus spinosa, forming dense communities, and are typical of abandoned croplands or meadows that have been impacted by high levels of nutrients during cultivation phase. At this stage, there is no additional nutrient input in studied plots, which lowers the nutrient content and increases the C/N ratio. C/N ratio is the highest in the forest, where SOC stock capacity is 116 t/ha/40 cm. Given the trend towards the abandonment of agricultural land at Kras Plateau (SW Slovenia), we can expect more overgrowth of dolines, and thus an increase in carbon stocks and stabilization of organic carbon in forest soils. In contrary, we noticed the alarming decrease in grasslands and increase in urban land. The SOC storage in 2020 was for 12,538 t/ha/40 cm lower than in 2002. Although grasslands showed the lowest SOC storage, their contribution to total SOC storage in dolines is very important. Since there is a lack of studies on carbon stocks in doline soils, our research is of great importance and a novelty and gives an important background for further research on SOC stock in karst landscapes worldwide.
Ključne besede: organic carbon sequestration, karst, grassland, forests, scrubland, dolines
Objavljeno v DiRROS: 20.04.2023; Ogledov: 765; Prenosov: 542
Celotno besedilo (6,74 MB)
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Ključne besede: vzorčenje tal, gozdovi, travnik, terensko delo, opis tal
Objavljeno v DiRROS: 06.06.2022; Ogledov: 974; Prenosov: 0