A preliminary comparison between two forest plot with different N load

Bertini, Giada

Jakovljevic, Tamara

Krunoslaw, Indir

Marchetto, Aldo

Potoclc, Nenad

Seletkovic, Ivan

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Comparing two permanent plots in 
Croatia and Italy with different levels of 
nitrogen deposition
Tamara Jakovljević1, Aldo Marchetto2, Giada Bertini3, Nenad Potočić1, 
Ivan Seletković1, Krunoslav Indir1
1 Hrvatski šumarski institut ‐ Croatian Forest Research Institute (CFRI),
Jastrebarsko, Croatia
2 Consiglio Nazionale delle Ricerche – Istituto per lo Studio degli Ecosistemi
(CNR‐ISE), Verbania Pallanza, Italy
3 Consiglio per la Ricerca e la sperimentazione in Agricoltura Centro di
Ricerca per la Selvicoltura (CRA‐SEL), Arezzo, Italy
VEN 2, IT
110, HR
Jastrebarskilugovi, 110
dominated by pedunculate
oak (QuercusroburL.)
3rd ICP Forests Scientific Conference, Athens, Greece, 26‐27 May 2014
Pokupsko basinfloodplain,  
closeto Zagreb
(agriculturalarea)
3rd ICP Forests Scientific Conference, Athens, Greece, 26‐27 May 2014
BoscoFontana, VEN2 
dominated by pedunculateoak (Quercus roburL.) 
located in the Po plain, 
European area rich in industries & agriculture
3rd ICP Forests Scientific Conference, Athens, Greece, 26‐27 May 2014
METHODS AND OBJECTIVES
• deposition (BOF, THR), foliar composition comparation
• defoliation,  growth comparation
Long term objectives: 
1) to identify differences in N deposition and precipitation between 
the sites and across time (2010 - )
2) to evaluate differences in N uptake/release in the canopy and N 
ratio to other elements in foliage 
3) to evaluate if high amounts of N deposition can stimulate tree 
growth at different defoliation levels.
Methods:
3rd ICP Forests Scientific Conference, Athens, Greece, 26‐27 May 2014
 foliar tissues show 
C:N ratio similar 
 N:P ratio is higher 
in plot VEN2
 VEN2N deposition
stronger
than in plot 110
RESULTS
3rd ICP Forests Scientific Conference, Athens, Greece, 26‐27 May 2014
RESULTS
 defoliation larger than 25% is higher in plot VEN2
2010
Plot Tree
density
n ha‐¹
Mortality   
n ha‐¹
Ingrowth   
n ha‐¹
Basal
area
(total)  
m2 ha‐1
Mean
dbh
cm
Mean 
height  
m
Top 
height
m
Volume 
m³ha‐1
Age 
y
ImV Actual bai
m²ha‐2 y‐1
VEN2 
IT
428 56 52 27,33 28,5 25,1 29,1 473,9 125 3,79 0,3
110 
HR
596 N/A N/A 39,6 29,1 N/A N/A 498,0 136 6,42 0,4
 similar age, mean DBH & volume; 110 HR higher tree density & basal area  
(Common  hornbean)
110, HR
VEN2, IT
CONCLUSION‐preliminary results
• Plan: to include more parameters  (soil solution, soil, meteoclimatic etc.)
• N deposition higher VEN2, 
IT across time, exceedance 
of CLs
• VEN2 defoliation more 
pronounced
• C:N in foliage similar; the 
N:P ratio is higher in plot 
VEN2 
• 110, HR & VEN2, IT similar 
growth rates 
• both plots  normal  volume 
for the age



Comparing two permanent plots in Croatia and Italy with different levels of nitrogen deposition

http://puma.isti.cnr.it/rmydownload.php?filename=cnr.ise/cnr.ise/2014-A3-002/2014-A3-002.pdf

Comparing two permanent plots in Croatia and Italy with different levels of nitrogen deposition

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