Inhibitory effects of Plantago lanceolata L. on soil N mineralization

Journal: Plant and Soil

Marko Dietz1, Susanne Machill2, Herbert C. Hoffmann2, Knut Schmidtke1

1 Faculty of Agriculture/Landscape Management, Dresden University of Applied Sciences, Pillnitzer Platz 2, D-01326 Dresden, Germany

2 Department of Chemistry and Food Chemistry, Faculty of Science, Dresden University of Technology, Bergstraße 66, D-01069 Dresden, Germany

Corresponding author: M. Dietz -

Table ESI-3. Concentrations of inorganic N in soil assays with addition of P. lanceolata aqueous extract in dependence of incubation time. Same inorganic N species were compared applying Tukey´s test (α = 0.05) and are marked with different letters by excess of the accordant significant difference (SD). IC = initial concentration. Nmin-N = (NO3--N + NH4+-N). Means, n = 5.

Soil incubation time [d] / 0 / 14 / 28 / 42 / 56
Soil additive / N species / MV [µg g-1 DM soil] (n=5)
-
(control) / NO3--N / 7.81a / 11.66a / 18.15a / 22.22a / 23.89a
NH4+-N / 0.34a / 0.82a / 0.50a / 0.83a / 2.06b
Nmin,-N / 8.15a / 12.49a / 18.65a / 23.05a / 25.95a
P. lanceolata
extract
(IC) / NO3--N / 0.10b / 0.24c / 0.28c / 0.16c
NH4+-N / 0.06c / 0.24a / 0.57a / 1.59b
Nmin,-N / 0.16c / 0.48c / 0.85c / 1.75d
P. lanceolata
extract
(50% of IC) / NO3--N / 6.83b / 0.07b / 0.35c / 0.67c / 3.31c
NH4+-N / 0.44a / 0.38bc / 0.38a / 1.55a / 3.43a
Nmin,-N / 7.28b / 0.45bc / 0.73c / 2.22c / 6.74c
P. lanceolata
extract
(25% of IC) / NO3--N / 0.22b / 4.55b / 10.44b / 17.57b
NH4+-N / 0.63ab / 0.44a / 1.91a / 1.85b
Nmin,-N / 0.85b / 4.99b / 12.36b / 19.43b
Statistical values
P / NO3--N / 0.0011 / 0.0009 / 0.3433 / <0.0001 / <0.0001
NH4+-N / 0.6376 / < 0.0001 / <0.0001 / 0.1952 / 0.0013
Nmin,-N / 0.0072 / < 0.0001 / <0.0001 / <0.0001 / <0.0001
F / NO3--N / 69.15 / 2030.02 / 717.41 / 161.81 / 179.41
NH4+-N / 0.26 / 11.11 / 1.22 / 1.83 / 10.19
Nmin,-N / 25.47 / 2654.57 / 905.68 / 240.50 / 177.51
SD
[µg g-1 DM soil] / NO3--N / 0.3259 / 0.5245 / 1.3262 / 3.4126 / 3.5549
NH4+-N / 0.4142 / 0.393 / 0.4243 / 1.9266 / 1.0823
Nmin,-N / 0.4951 / 0.4887 / 1.1922 / 2.7935 / 3.5178