Clocaenog 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 2.0 10
K 2.6 10
Ca 9.0 10
Mg 0.8 10
Heavy Metals (g ha-1 yr-1) Cu 6.1 10
Zn 96.9 10
Cd 1.10 10
Pb 0.88 10
Ni 2.0 10
Cr 2.1 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 0.51 0.020 5 0.07 0.013 5 0.036 0.005 5
P 0.056 0.003 5 0.011 0.002 5 0.001 0 5
K 0.280 0.022 5 0.046 0.003 5 0.029 0.002 5
Mg 0.09 0.010 5 0.012 0.001 5 0.009 0.0007 5
Ca 1.426 0.146 5 0.078 0.002 5 0.113 0.010 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 4.7 0.221 5 1.06 0.102 5 1.06 0.143 5
Zn 162.3 15.10 5 8.5 0.301 5 10.92 0.693 5
Cd 1.053 0.159 5 0.162 0.014 5 0.183 0.034 5
Pb 1.25 0.175 5 0.172 0.049 5 0.039 0.027 5
Ni 1.888 0.196 5 0.395 0.090 5 0.262 0.059 5
Cr 0.800 0.104 5 0.511 0.101 5 0.343 0.065 5