Download as a PDF - CiteSeerX

comparable to those in water draining slurry treated or sheep-grazed drained plots
(Vinten et al., 2004). The PO 4
-P concentrations draining from all treatments were
very low, comparable to those draining from arable fields, but the values were lowest
from the ochre treatment. The ratio of P to NH 4
-N in the drainage water was similar
to that in the input slurry.
0.8
EC/ECinput
160
DOC mg/L
EC/EC in
0.6
0.4
0.2
DOC (mg/L)
120
80
40
0.0
0 100 200 300
mm drainage
0
0 100 200 300
mm drainage
log [E.coli]
cfu/100mL
5
4
3
2
1
log [E.coli] cfu/100mL
0 100 200 300
mm drainage
ammonium-N (mg/L)
8
6
4
2
0
NH 4-N mg/L
0 100 200 300
mm drainage
NO 3-N mg/L
PO 4-P mg/L
nitrate-N (mg/L)
80
60
40
20
0
0 100 200 300
mm drainage
phosphate-P (mg/L)
0.4
0.3
0.2
0.1
0.0
subsoil
Ochre
0 100 200 300
mm drainage
Figure 2: Lysimeter leachate concentrations of EC, DOC, E. coli, NH 4
-N,
NO 3
-N and PO 4
-P for control (40 cm of subsoil) and ochre (10 cm of
ochre and 30 cm of subsoil) lysimeters
256