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Table 2 Shoot N and P concentration and content, and shoot dry matter, 55 days after sowing, (Rhizobox experiment)

From: Improving fertilizer-depot exploitation and maize growth by inoculation with plant growth-promoting bacteria: from lab to field

  N conc. (% DM) N content (mg N plant−1) P conc. (mg P g−1 DM) P content (mg P plant−1) Shoot DM (g plant−1)
LS means N*BE
 NO3-mixed*NoBE 1.83 114.0 2.18 13.7 6.35
 NO3-mixed*BE1 2.22 130.1 2.32 13.6 5.91
 NH4-Depot*NoBE 2.47 137.1 2.93 16.2 5.60
 NH4-Depot*BE1 2.66 133.9 3.15 15.9 5.09
 Standard error 0.134 4.69 0.146 0.62 0.420
Two-way ANOVA
 N 0.002** 0.014* < 0.001*** 0.002 ** NS
 NO3 2.03 b 122.0 b 2.52 b 13.6 b 6.13
 NH4 2.57 a 135.5 a 3.04 a 16.0 a 5.35
 BE 0.051 NS NS NS NS
 NoBE 2.15 125.7 2.56 15.0 5.97
 BE1 2.44 132.0 2.73 14.7 5.50
 N*BE NS NS NS NS NS
  1. P values are in italics; NS no significant difference when P ≥ 0.1; P < 0.1 is bold italics; * P < 0.5; ** P < 0.01; *** P < 0.001; Means not sharing the same letters are significantly different from each other, Tukey test α = 0.05; factors and interaction is bold italics; NO3 Ca(NO3)2 homogenously mixed in substrate
  2. NH4 stabilized (NH4)2SO4 placed in substrate as a depot, BE bio-effector, NoBE no bio-effector, BE1 Pseudomonas sp. DSMZ 13134