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Table 4 Element contents in mg kg−1 in above-ground plant biomass, values represent means ± sd (standard deviation) from samples of 2015 and 2016; table sorted by site and decreasing cobalt concentration

From: Trace element delivery for biogas production enhanced by alternative energy crops: results from two-year field trials

Variant n Co Mn Mo Ni
Reinshof
 Faba bean (Su) 8 0.188 ± 0.037 42.6 ± 7.1 0.64 ± 0.19 0.93 ± 0.20
 Faba bean (Wi) 8 0.127 ± 0.029 33.2 ± 5.8 0.86 ± 0.26 0.67 ± 0.16
 PF mix 8 0.059 ± 0.009 31.7 ± 4.5 0.52 ± 0.15 0.36 ± 0.07
 Amaranth 8 0.051 ± 0.007 44.5 ± 10.2 0.68 ± 0.36 0.17 ± 0.05
 Faba bean/trit 8 0.050 ± 0.018 30.6 ± 2.5 1.14 ± 0.30 0.35 ± 0.09
 Cup plant 4 0.028 ± 0.006 25.1 ± 2.8 0.08 ± 0.02 0.33 ± 0.03
 AF mix 8 0.027 ± 0.012 37.5 ± 8.1 0.39 ± 0.21 0.22 ± 0.05
 Ryegrass 24 0.020 ± 0.012 64.5 ± 25.6 2.50 ± 1.30 0.71 ± 0.18
 Amaranth/maize 8 0.011 ± 0.002 19.4 ± 0.5 0.43 ± 0.15 0.14 ± 0.01
 Rye/vetch 8 0.010 ± 0.007 18.6 ± 3.3 1.00 ± 0.30 0.13 ± 0.07
 Triticale (Wi) 8 0.010 ± 0.004 26.3 ± 3.9 1.33 ± 0.18 0.17 ± 0.11
 Maize 7 0.009 ± 0.005 18.2 ± 1.6 0.40 ± 0.18 0.14 ± 0.04
Sömmerling
 Faba bean (Su) 8 0.269 ± 0.074 44.3 ± 11.6 0.35 ± 0.18 0.53 ± 0.14
 Faba bean (Wi) 8 0.148 ± 0.065 40.1 ± 12.3 0.36 ± 0.17 0.35 ± 0.10
 AF mix 8 0.143 ± 0.073 43.6 ± 9.6 0.18 ± 0.05 0.27 ± 0.08
 Amaranth 8 0.130 ± 0.052 50.3 ± 30.6 0.38 ± 0.12 0.17 ± 0.09
 PF mix 8 0.126 ± 0.067 35.0 ± 9.1 0.33 ± 0.10 0.26 ± 0.07
 Faba bean/trit 8 0.111 ± 0.041 32.5 ± 6.8 0.31 ± 0.13 0.27 ± 0.07
 Cup plant 4 0.044 ± 0.035 32.9 ± 6.1 0.09 ± 0.02 0.28 ± 0.05
 Ryegrass 12 0.034 ± 0.019 77.6 ± 21.0 1.30 ± 0.20 0.42 ± 0.13
 Rye/vetch 4 0.031 ± 0.012 22.1 ± 5.3 0.58 ± 0.23 0.23 ± 0.16
 Amaranth/maize 8 0.014 ± 0.007 18.3 ± 1.5 0.32 ± 0.12 0.09 ± 0.01
 Triticale (Wi) 8 0.011 ± 0.003 20.4 ± 4.8 0.52 ± 0.34 0.09 ± 0.06
 Maize 8 0.008 ± 0.007 16.9 ± 3.3 0.32 ± 0.17 0.08 ± 0.02
  1. PF mix = perennial flower mixture, AF mix = annual flower mixture