Rannoch 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 2.8 10
P 0.3 10
K 1.8 10
Ca 3.1 10
Mg 0.6 10
Heavy Metals (g ha-1 yr-1) Cu 10.1 10
Zn 23.3 10
Cd 0.50 10
Pb 1.09 10
Ni 2.3 10
Cr 4.9 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 0.274 0.031 5 0.084 0.005 5 0.046 0.002 5
P 0.03 0.005 5 0.008 0.001 5 0.0028 0.0003 5
K 0.132 0.022 5 0.062 0.005 5 0.0286 0.004 5
Mg 0.032 0.006 5 0.014 0.001 5 0.02 0.001 5
Ca 0.286 0.040 5 0.058 0.002 5 0.0892 0.003 5
S 25.92 2.714 5 26.97 2.682 5 12.39 0.958 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 7.64 0.958 5 3.125 1.013 4 2.06 0.338 5
Zn 13.02 1.895 5 5.225 0.718 4 7 0.584 5
Cd 0.284 0.077 5 0.095 0.018 4 0.164 0.020 5
Pb 1.47 0.286 5 0.372 0.112 4 0.106 0.056 5
Ni 1.94 0.381 5 0.856 0.098 5 0.253 0.059 5
Cr 3.646 0.644 5 1.83 0.265 5 0.633 0.146 5