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Table 5 Mean values of leachate amounts, concentrations and leaching loads of different forms of P for the four leaching events after slurry or mineral P application to the soil columns

From: Phosphorus leaching from loamy sand and clay loam topsoils after application of pig slurry

Soil

Treatment

Leachate mm

Total P

DRP

Other-P

   

Conc., mg L-1

Load, kg ha-1

Conc., mg L-1

Load, kg ha-1

Conc., mg L-1

Load, kg ha-1

Clay loam

Control

17.0 a

0.15 a

0.024 a

0.02 a

0.003 a

0.13 c

0.021 b

 

SP-Surf

17.7 a

2.76 c

0.482 c

1.77 d

0.304 d

0.99 e

0.178 d

 

SP-Incor

17.5 a

1.39 b

0.238 b

0.64 c

0.110 c

0.74 e

0.128 d

 

MinP

17.5 a

1.50 b

0.231 b

1.15 cd

0.174 cd

0.35 d

0.057 c

Loamy sand

Control

18.7 a

0.23 a

0.044 a

0.17 b

0.032 b

0.06 ab

0.011 ab

 

SP-Surf

17.9 a

0.17 a

0.031 a

0.11 b

0.019 b

0.07 ab

0.012 ab

 

SP-Incor

15.7 a

0.20 a

0.032 a

0.10 b

0.016 b

0.11 bc

0.016 b

 

MinP

16.2 a

0.18 a

0.029 a

0.13 b

0.021 b

0.05 a

0.008 a

  1. Small letters (a, b, c, d, e) indicate significant differences within each table column (α=0.05; n=3 for the control, SP-Incor and MinP treatments of the clay loam, respectively; n=4 for all the other treatments).