Naslov
Beech nutrition depends on defoliation, soil and climate across Croatia

Autori
Ognjenović, Mladen ; Seletković, Ivan ; Potočić, Nenad ; Perčec - Tadić, Melita ; Sokol Jurković, Renata ; Marušić, Mia ; Sever, Krunoslav ; Ugarković, Damir ; Timmermann, Volkmar ; Rautio, Pasi ; Jonard, Mathieu

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Forest Monitoring to assess Forest Functioning under Air Pollution and Climate Change / Schaub, Marcus ; Vesterdal, Lars ; De Vos, Bruno ; Ukonmaanaho, Liisa ; Fleck, Stefan ; Schwärzel, Kai ; Ferretti, Marco - Birmensdorf : Swiss Federal Research Institute WSL, 2021, 70-70

Skup
9th Forest Ecosystem Monitoring Conference FORECOMON 2021

Mjesto i datum
Birmensdorf, Švicarska, 07.06.2021. - 09.06.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
European beech, crown defoliation, mineral nutrition

Sažetak
Changing climate conditions can be critical for the vitality of trees, as high temperatures and/or drought may cause inadequate nutrition of trees in parallel with a worsening of crown condition. It is crucial to account for nutrient limitation when studying the forest response to climate change (Jonard et al. 2015). Nutrient contents of tree foliage, which reflect atmospheric and soil-related influences, are an important part of UNECE ICP Forests monitoring programme (Krüger et al. 2020). The main goals of this study were to: (I) investigate the influence of climate conditions on mineral nutrition of common beech, and (II) determine if concentrations of N, P, K, Ca and Mg in common beech foliage differ between tree defoliation classes. Stratified sampling of trees based on their defoliation class (≤25%, >25%) was performed on 28 Level I beech plots (10 in Dinaric, 18 in Pannonian biogeographical region) in 2018, 2019 and 2020, five trees per plot and defoliation class. We detected significant nutritional differences between trees of different defoliation classes for P and Mg, but only in certain years – for less defoliated trees P was higher in 2019, and Mg was lower in 2018. The ratios of N/P, Ca/Mg, K/Ca, K/Mg and K/Ca+Mg were higher for less defoliated trees in most cases. All ratios with Ca (N/Ca, K/Ca, K/Ca+Mg) were higher for less defoliated trees in 2018 and 2019, but not in the drier 2020. Calcium concentrations increased with increasing soil pH (CaCl2) for plots in the Pannonian region, which has a wider span of pH values, while in Dinaric plots with pH mostly higher than 5 such correlation was not found. A multitude of climate factors correlated with nutrient concentrations, but summer temperatures seem to have the strongest negative influence.

Izvorni jezik
Engleski

Znanstvena područja
Šumarstvo

POVEZANOST RADA