Coalburn 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 2.0 10
P 0.5 10
K 3.2 10
Ca 6.1 10
Mg 0.8 10
Heavy Metals (g ha-1 yr-1) Cu 29.5 10
Zn 226 10
Cd 0.74 10
Pb 5.17 10
Ni 4.3 10
Cr 9.7 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 0.356 0.019 5 0.012 0.012 5 0 0 5
P 0.06 0.003 5 0.007 0.001 5 0.001 0 5
K 0.239 0.018 5 0.052 0.007 5 0.023 0.0008 5
Mg 0.063 0.004 5 0.009 0.0009 5 0.008 0.0004 5
Ca 0.571 0.065 5 0.055 0.002 5 0.070 0.008 5
S 129.4 9.798 5 16.98 2.790 5 16.11 2.265 5

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 7.06 0.269 5 5.1 1.200 5 4.275 0.534 5
Zn 96.06 7.181 5 39.42 6.990 5 24.47 8.235 5
Cd 0.356 0.065 5 0.074 0.022 5 0.132 0.049 5
Pb 1.196 0.171 5 0.787 0.091 5 0.860 0.112 5
Ni 1.348 0.155 5 0.843 0.196 5 0.467 0.169 5
Cr 4.917 0.977 5 1.758 0.529 5 0.906 0.550 5