Covert Wood 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 6.8 10
P 3.1 10
K 4.2 10
Ca 9.9 10
Mg 1.5 10
Heavy Metals (g ha-1 yr-1) Cu 14.8 10
Zn 16.2 10
Cd 0.40 10
Pb 2.18 10
Ni 7.8 10
Cr 4.0 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 0.596 0.028 5 0.116 0.016 5 0.076 0.005 5
P 0.032 0.001 5 0.007 0.0009 5 0.005 0.0002 5
K 0.169 0.008 5 0.056 0.004 5 0.091 0.012 5
Mg 0.043 0.001 5 0.019 0.001 5 0.036 0.007 5
Ca 1.954 0.125 5 0.096 0.014 5 0.092 0.006 5
S 147.9 7.341 5 54.24 6.570 5 54.84 22.18 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 4.04 0.441 5 3.32 1.366 5 1.4 0.187 5
Zn 5.9 0.880 5 2.32 0.634 5 3.42 0.960 5
Cd 0.122 0.029 5 0.045 0.011 5 0.106 0.010 5
Pb 2.495 0.471 5 0.284 0.070 5 0.306 0.067 5
Ni 2.113 0.273 5 1.422 0.069 5 1.237 0.107 5
Cr 1.600 0.081 5 0.732 0.271 5 0.577 0.067 5