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Table 6 Mineral contents in harvested leaves

From: Efficiency and effectiveness of vitamin C-substrate organo-mineral straight fertilizer in lettuce (Lactuca sativa L.)

Minerals Control (water only) r-Ringer (1/2000) AGH-Ringer (1/2000) AGH-Ringer (1/1000) AGH-Ringer (1/500)
Ca 7143 ± 13c 7045 ± 21d 7706 ± 5b 7032 ± 23d 7845 ± 9.46a
Zn 37 ± 0.11e 41 ± 0.12d 51 ± 0.16a 44 ± 0.31c 45 ± 0.31b
Fe 255 ± 2.17c 335 ± 1.21a 172 ± 0.33e 196 ± 0.85d 304 ± 1.48b
Cu 0.31 ± 0.02b 0 ± 0c 1.13 ± 0.06a 0 ± 0c 0.25 ± 0.05b
Se 0 ± 0a 0 ± 0a 0 ± 0a 0 ± 0a 0 ± 0a
K 40,953 ± 146c 35,549 ± 58d 43,048 ± 148b 45,822 ± 127a 45,811 ± 225a
Mg 2095 ± 7.06d 2034 ± 5.93e 2228 ± 6.99c 2291 ± 24.2b 2356 ± 2.69a
Mn 13 ± 0.02d 13 ± 0.03d 17 ± 0.05c 18 ± 0.07b 27 ± 0.19a
B 20 ± 0.12c 19 ± 0.06d 25 ± 0.17b 31 ± 0.22a 20 ± 0.03c
Mo 0 ± 0a 0 ± 0a 0 ± 0a 0 ± 0a 0 ± 0a
Na 2039 ± 12d 1439 ± 3e 2230 ± 0.32c 2494 ± 4d 2308 ± 9.0a
Co 0 ± 0a 0 ± 0a 0 ± 0a 0 ± 0a 0 ± 0a
P 6465 ± 28b 4632 ± 12e 6364 ± 11c 5306 ± 17d 6807 ± 49a
S 1873 ± 10c 2051 ± 14b 2076 ± 11b 1548 ± 15d 2119 ± 20a
Cr 39.6 ± 0.15e 44.9 ± 0.2d 53.8 ± 0.14a 46.6 ± 0.29c 48.7 ± 0.55b
Sum 60,933 ± 219 53,203 ± 115 63,972 ± 183 64,829 ± 213 67,691 ± 318
  1. All data are expressed as mean ± standard deviation (n = 3). Different letters show a significant difference at p < 0.05 as determined by Duncan’s multiple range tests