Kelty 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 3.3 10
P 1.6 10
K 2.2 10
Ca 2.9 10
Mg 0.6 10
Heavy Metals (g ha-1 yr-1) Cu 5.4 10
Zn 12.7 10
Cd 0.11 10
Pb 2.08 10
Ni 3.7 10
Cr 1.7 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 0.632 0.052 5 0.126 0.019 5 0.07 0.005 5
P 0.038 0.002 5 0.009 0.001 5 0.010 0.002 5
K 0.199 0.019 5 0.072 0.010 5 0.089 0.015 5
Mg 0.052 0.002 5 0.018 0.002 5 0.024 0.001 5
Ca 0.993 0.070 5 0.070 0.005 5 0.074 0.003 5
S 103.2 10.8 5 58.42 18.97 5 40.42 0.825 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 4.1 0.270 5 2.22 0.269 5 1.58 0.361 5
Zn 16.98 4.830 5 3.42 0.575 5 5.8 1.436 5
Cd 0.085 0.007 5 0.028 0.007 5 0.060 0.012 5
Pb 2.448 0.252 5 0.66 0.139 5 0.829 0.077 5
Ni 1.677 0.330 5 1.534 0.163 5 1.204 0.066 5
Cr 1.282 0.175 5 0.666 0.199 5 0.606 0.150 5