Wangford 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 5.1 10
P 2.4 10
K 5.1 10
Ca 7.7 10
Mg 1.3 10
Heavy Metals (g ha-1 yr-1) Cu 7.5 10
Zn 30.0 10
Cd 0.24 10
Pb 1.29 10
Ni 3.2 10
Cr 3.0 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 0.59 0.013 5 0.078 0.0008 5 0.082 0.003 5
P 0.033 0.0008 5 0.007 0.0007 5 0.009 0.002 5
K 0.191 0.015 5 0.078 0.013 5 0.126 0.021 5
Mg 0.044 0.002 5 0.019 0.004 5 0.0312 0.005 5
Ca 1.644 0.142 5 0.072 0.005 5 0.101 0.005 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 3.7 0.412 5 1.24 0.252 5 1.6 0.294 5
Zn 15.64 7.993 5 2.3 0.364 5 10.5 3.435 5
Cd 0.079 0.025 5 0.042 0.004 5 0.054 0.014 5
Pb 1.497 0.307 5 0.195 0.068 5 0.230 0.050 5
Ni 0.883 0.081 5 0.588 0.030 5 0.681 0.084 5
Cr 1.358 0.192 5 0.596 0.245 5 0.496 0.050 5