Cannonteign 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 5.7 10
P 2.5 10
K 4.6 10
Ca 4.6 10
Mg 1.3 10
Heavy Metals (g ha-1 yr-1) Cu 9.6 10
Zn 24.7 10
Cd 0.30 10
Pb 1.13 10
Ni 3.3 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 0.622 0.065 5 0.12 0.01 2 0.085 0.005 2
P 0.037 0.003 5 0.006 0.0003 5 0.006 0.0006 5
K 0.201 0.008 5 0.074 0.006 5 0.141 0.010 5
Mg 0.049 0.005 5 0.016 0.0007 5 0.046 0.008 5
Ca 0.833 0.036 5 0.066 0.004 5 0.079 0.001 5
S 124.4 9.880 5 39.36 4.438 5 30.42 2.247 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 5.76 0.575 5 2.08 0.351 5 1.9 0.126 5
Zn 18.78 1.951 5 3.4 0.450 5 7.48 1.359 5
Cd 0.069 0.021 5 0.059 0.016 5 0.080 0.025 5
Pb 0.809 0.203 5 0.208 0.058 5 0.263 0.095 5
Ni 0.786 0.278 5 0.801 0.094 5 0.670 0.041 5
Cr 2.718 0.582 5 0.462 0.092 5 0.246 0.068 5