Table 7. Alkaline phosphatase activity (µg PNP 100 g−1 soil h−1) and microbial biomass P concentration (µg g−1) (mean ± (Sd)) in soil treated with different amendments and inoculated with microbial inoculums

From: Using zeolite, molasses, and PGP microorganisms to improve apatite solubility and increase phosphorus uptake by Sorghum bicolor L. (Speedfed cultivar)

Properties

Treatment

Non-inoculated

S. indica

E. cloacae

Brevundimonas

C. etunicatum

Alkaline phosphatase

Control

72.18j ± (4.02)

104.01cdefg ± (2.97)

108.01cde ± (1.89)

105.21cde ± (4.96)

104.45cde ± (3.86)

Ap

93.57efg ± (6.74)

100.09def ± (6.88)

110.68bcd ± (7.66)

105.62cde ± (6.27)

113.36bcd ± (8.38)

Ap-Z

71.76j ± (6.64)

85.70ghi ± (1.28)

90.81fgh ± (5.94)

75.96ij ± (1.85)

78.56hij ± (5.84)

Ap-M

110.39bcd ± (7.85)

113.32bcd ± (5.78)

133.17a ± (5.00)

115.13bc ± (8.88)

119.18b ± (3.23)

Biomass P

Control

273.29j ± (4.98)

380.81 fg ± (11.53)

412.11ab ± (9.92)

396.85cde ± (2.42)

415.34a ± (9.13)

Ap

269.68j ± (3.87)

386.03ef ± (11.20)

402.67abcd ± (12.93)

359.22 h ± (10.35)

415.87a ± (2.56)

Ap-Z

386.63ef ± (8.14)

401.91bcd ± (2.92)

399.26bcde ± (3.08)

389.15def ± (5.17)

407.40abc ± (6.37)

Ap-M

343.36i ± (3.61)

346.10i ± (5.29)

385.94ef ± (6.97)

370.69gh ± (2.96)

394.65cde ± (6.85)

  1. The same letter in each P fraction indicates non-significant differences at P < 0.05. Ap, Ap (0.15%); Ap_Z, Ap (0.15%) + zeolite (0.3%); and Ap-M, Ap (0.15%) + molasses (0.1%).