Culbin Level II plot - Uptake of heavy metals

Rate of uptake of macronutrients and heavy metals based on estimated tree growth rates
Element Rate of uptake Sample size
Macronutrients (kg ha-1 yr-1) N 1.9 10
P 1.0 10
K 2.2 10
Ca 3.5 10
Mg 1.1 10
Heavy Metals (g ha-1 yr-1) Cu 7.5 10
Zn 37.0 10
Cd 0.60 10
Pb 3.27 10
Ni 1.0 10
Cr 1.4 10

Levels of various macronutrients (mg/kg) in bark, sapwood and heartwood of a selection of dominant and co-dominant trees
Element Bark Sapwood Heartwood
Average Standard error Sample size Average Standard error Sample size Average Standard error Sample size
N 0.222 0.014 5 0.024 0.002 5 0.022 0.003 5
P 0.016 0.001 5 0.007 0.001 5 0.001 0 5
K 0.044 0.001 5 0.051 0.002 5 0.029 0.001 5
Mg 0.04 0.002 5 0.016 0.001 5 0.023 0.001 5
Ca 0.207 0.040 5 0.045 0.004 5 0.072 0.001 5
S

Levels of various heavy metals (mg/kg) in bark, sapwood and heartwood of a selection of dominant and co-dominant trees
Element Bark Sapwood Heartwood
Average Standard error Sample size Average Standard error Sample size Average Standard error Sample size
Cu 3.04 0.320 5 0.92 0.111 5 1.86 0.556 5
Zn 16.78 1.611 5 6.16 0.560 5 6.9 0.826 5
Cd 0.13 0.017 5 0.121 0.015 5 0.107 0.011 5
Pb 3.520 0.453 5 0.426 0.050 5 0.447 0.029 5
Ni 0.409 0.078 5 0.232 0.047 5 0.122 0.025 5
Cr 0.454 0.093 5 0.268 0.098 5 0.227 0.068 5