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Table 6 Increase in leachate amounts, concentrations and leaching loads of different forms of P 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   0.2  0.00 −0.001 −0.01 −0.002  0.01  0.002
  SP-Surf   0.4  2.65***  0.461***  1.74***  0.298***  0.91***  0.163***
  SP-Incor   1.6  1.23***  0.214***  0.56***  0.096***  0.68***  0.118***
  MinP   2.1  1.42***  0.219***  1.13***  0.171***  0.29***  0.048***
Loamy sand Control   1.2 −0.04 −0.004 −0.02 −0.001 −0.02 −0.003
  SP-Surf   0.7 −0.03 −0.004 −0.03 −0.004  0.00  0.001*
  SP-Incor  −3.5*  0.03 −0.002 −0.01 −0.006  0.04  0.004*
  MinP  −2.3 −0.02 −0.009  0.00 −0.004 −0.02 −0.005
  1. Symbol (*) indicate significant differences between values after P application and before (*: α=0.05; ***: α=0.001; n=3 for the control of the clay loam throughout the experiment, and for the SP-Incor and MinP treatments of the clay loam after the laboratory P application, respectively; n=4 for all the other treatments).