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Table 5 The effect of vermicompost, biochar and deficit irrigation on soil chemical properties

From: Biochar and vermicompost improve growth and physiological traits of eggplant (Solanum melongena L.) under deficit irrigation

Treatment pH-KCl EC (µS/cm) SOC % Total N
%
Mineral N (mg/kg) P–AL (mg/kg) Ca–AL (mg/kg) K–AL (mg/kg) Mg–AL (mg/kg)
S1V0B0 7.2 c 5.2 c 0.7 c 0.07 b 8.3 b 211.7 b 713.5 c 218.1 c 118.3 d
S1V0DPB 8.9 a 7.2 a 1.5 a 0.08 b 8.5 b 219.3 b 724.3 b 231.5 b 131.5 c
S1V0PB 7.9 b 7.8 a 1.6 a 0.08 b 8.6 b 218.9 b 730.8 b 229.7 b 127.3 c
S1V1B0 7.9 b 4.9 c 1.1 b 0.10 a 12.0 a 222.0 a 772.1 a 284.2 a 195.2 a
S1V1DPB 8.5 a 6.5 b 1.5 a 0.10 a 12.3 a 224.1 a 798.7a 275.8 a 185.9 a
S1V1PB 8.0 b 6.7 b 1.5 a 0.10 a 12.5 a 229.2 a 782.5 a 269.9 a 194.1 a
S2V0B0 7.1 c 5.5 c 0.8 c 0.07 b 8.2 b 210.1 b 710.9 c 215.2 c 110.6 d
S2V0DPB 8.5 a 7.4 a 1.6 a 0.08 b 8.5 b 216.0 b 721.6 b 229.7 b 129.9 c
S2V0PB 7.8 b 7.7 a 1.5 a 0.07 b 8.5 b 215.8 b 719.9 b 228.1 b 130.0 c
S2V1B0 7.8 b 4.8 c 1.0 b 0.10 a 11.8 a 229.9 a 767.3 a 276.1 a 179.8 a
S2V1DPB 8.4 a 6.7 b 1.6 a 0.10 a 11.5 a 229.5 a 785.7 a 263.5 a 168.5 b
S2V1PB 8.0 b 6.7 b 1.5 a 0.10 a 11.9 a 231.4 a 790.2 a 265.0 a 175.5 ab
S3V0B0 7.0 c 5.3 c 0.7 c 0.05 c 8.7 b 213.0 b 709.5 c 214.3 c 112.2 d
S3V0DPB 8.8 a 7.1 a 1.4 a 0.08 b 8.3 b 219.6 b 715.2 c 225.4 b 121.5 c
S3V0PB 7.8 b 7.4 a 1.5 a 0.08 b 8.1 b 216.8 b 715.0 c 226.0 b 122.8 c
S3V1B0 7.7 b 4.9 c 1.1 b 0.10 a 11.4 a 227.1 a 758.7 a 265.5 a 164.7 b
S3V1DPB 8.4 a 6.9 b 1.5 a 0.10 a 11.0 a 228.4 a 769.8 a 253.7 a 154.3 b
S3V1PB 7.9 b 6.4 b 1.5 a 0.10 a 11.0 a 227.6 a 770.5 a 258.5 a 149.1 b
  1. B0, no biochar; DPB, 500 g m−2 date palm biochar and PB, 500 g m−2 pistachio biochar; V0, no vermicompost and V1, 1500 g m−2; S1, 100% water requirement; S2, 75% water requirement and S3, 50% water requirement; EC, electrical conductivity; SOC, soil organic carbon; P–AL, ammonium lactate-extractable phosphorous; Ca–AL, ammonium lactate-extractable calcium; K–AL, ammonium lactate-extractable potassium; Mg–AL, ammonium lactate-extractable magnesium
  2. Different letters within each column are significantly different at P < 0.05 using the Duncan multiple range test