Table 2 Mean comparison of main effect on P release (mg kg−1) and PSB population (at 56 day) in soil as influenced by P sources and PSBs inoculation at different soil lime content.

From: Phosphate-Solubilizing Bacteria Nullify the Antagonistic Effect of Soil Calcification on Bioavailability of Phosphorus in Alkaline Soils

Inoculation

Olsen extractable Phosphorus (mg kg−1)

Days

0

7

14

28

56

Net increase in Olsen P over incubation

PSB population at day 56

Phosphorus release (mg kg−1) (105 CFU g−1 dry soil)

Control

6.84

7.20

7.78

8.46

9.04

2.20

7.65

PSBs

6.84

7.64

8.52

10

11.06

4.22

8.33

LSD(0.05)

ns

0.104

0.146

0.134

0.150

0.077

7560

Phosphorous sources

SSP

7.92a

8.06a

8.20b

8.36c

8.42c

0.50d

6.73d

Rock Phosphate

6.32c

6.80d

7.16c

7.62d

8.02d

1.70c

7.39c

FYM

6.60b

7.32c

8.58a

10.38b

11.58b

4.98b

8.79b

PM

6.52b

7.54b

8.66a

10.58a

12.22a

5.70a

9.03a

LSD(0.05)

0.114

0.148

0.206

0.188

0.212

0.109

10692

Lime (%)

4.78

7.16a

7.94a

8.90a

10.08a

10.98a

3.82a

8.77a

10

6.94b

7.80a

8.70b

8.78b

10.70b

3.76a

8.48b

15

6.82b

7.50b

8.32c

9.44c

10.28c

3.46c

8.16c

20

6.40c

6.48c

6.66d

7.77d

8.32d

1.92d

6.55d

LSD(0.05)

0.114

0.148

0.206

0.188

0.212

0.109

10692

Interaction

L x PS

*Fig. 1

ns

***Fig. 2

***Fig. 3

***Fig. 4

ns

***Fig. 11

L x I

ns

**Fig. 5

***Fig. 6

***Fig. 7

***Fig. 8

ns

ns

I x PS

ns

ns

ns

***Fig. 9

***Fig. 10

ns

***Fig. 12

L x I x PS

ns

ns

ns

ns

ns

ns

ns

CV

2.88

3.48

4.41

3.54

3.66

11.79

2.32

  1. PS, I, L, ns, *,** and ***indicates phosphorus sources, inoculation, lime, non-significant and significant (LSD test) at p ≤ 0.05, p ≤ 0.01, and p ≤ 0.001 respectively. Means followed by different letter in each column are significantly different at p ≤ 0.05.