226
- '0 o
- 'en
~
Z
en
E
- c: Q)
en
o
...
:!::
Z
m ...
Q)
c:
~
PRADES
H Horizon
Isabel Serrasolses, Victoria Diego and David Bonilla
250 . . . - - - - - - - - - - - - ,
200
150
100
50
o
ANFMANFMANFM
PRADES
Mineral Soil
H Horizon +
N-NH.
-09-- N-N0 3 -
Mineral Soil
0- 5 em
- .. -- 5 - 10em
-06-- 5 - 20 em
MONTSENY
Mineral Soil
N-NH 4 +
50 . . . - - - - - - - - - - - - ,
, - - - - - - - - - - - - - - , 50
~
~
~
~
~
~
10
10
o
0
ANFMANFMANFM
MAMJJASONDJFM
N-N0 3 -
6
6 r--------------------~
r~----------------__,
5
5
4
4
3
3
2
2
1
1
o
0
ANFMANFMANFM
MAMJJASONDJFM
Fig. 16.2. Soil ammonium-N and nitrate-N concentrations throughout the year at Montseny and
over 3 years at Prades. Each point is the mean of 3-4 (Prades) and 2 (Montseny, ± SE) composite
samples
Mineral N concentrations decreased with soil depth (Fig. 16.2). In the upper
mineral soil (0-5 cm), mineral N was higher at Montseny (22.3 ± 2.6 mg
N kg-I) than at Prades (14.8 ± 0.8 mg N kg-I), while similar concentrations