Kiddens 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 4.0 10
P 2.2 10
K 3.7 10
Ca 10.6 10
Mg 0.8 10
Heavy Metals (g ha-1 yr-1) Cu 10.1 10
Zn 85.0 10
Cd 0.45 10
Pb 1.68 10
Ni 1.8 10
Cr 1.9 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 0.466 0.068 5 0.06 0.081 5 0.032 0.073 5
P 0.053 0.019 5 0.13 0.029 5 0.0008 0.015 5
K 0.304 0.059 5 0.54 0.038 5 0.051 0.107 5
Mg 0.061 0.048 5 0.010 0.020 5 0.010 0.021 5
Ca 1.403 0.169 5 0.089 0.034 5 0.124 0.017 5
S 0 0 0 0 0 0 0 0 0

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 5.1 0.232 5 1.94 1.173 5 1.44 0.454 5
Zn 134.7 1.920 5 5.96 0.361 5 7.58 0.625 5
Cd 0.364 0.170 5 0.057 0.036 5 0.072 0.119 5
Pb 1.599 0.136 5 0.259 0.200 5 0.178 0.184 5
Ni 0.820 0.300 5 0.454 0.289 5 0.177 0.238 5
Cr 0.843 0.176 5 0.420 0.548 5 0.236 0.284 5