Agriculture Reference
In-Depth Information
Total phosphorus content ranged from 160 to 250 mg kg
-1
from stratum I to II,
respectively. The dissolved inorganic P (DIP) was significantly higher in the OF horizon of
stratum II.
Table 3. Concentration of C (mg kg
-1
), N (mg N kg
-1
) and P (mg P kg
-1
) forms in the soil
horizons (OF, OH). In parentheses the percentages of total C, N or P
I
II
Horizon
OF
OH
OF
OH
N-NH
4
+
mg kg
-1
119.9(0.9)
15.0(0.1)
146.3(1.0)
38.6(0.3)
N-NO
3
-
mg kg
-1
10.2(0.1)
8.5(0.05)
50.2(0.4)
10.2(0.1)
N
micr
mg kg
-1
450(3.5)
120(0.7)
266(8.7)
716(5.9)
DON mg kg
-1
nd
443(2.8)
nd
193(1.6)
NPot (anaerobic) mg kg
-
1
30.1(0.2)
14.8(0.1)
0.0
39.1(0.3)
DOC mg kg
-1
27000(6.1)
16900(4.5)
18000(4.2)
15000(4.3)
C
micr
mg kg
-1
13000(3.0)
1137(0.3)
23000(5.4)
2796(0.8)
C/N
( microbic)
28
9
8
4
DIP mg kg
-1
0.6(0.38)
0.4(0.24)
1.0(0.40)
0.2(0.09)
DOP mg kg
-1
0.7(0.44)
0.8(0.47)
0.4(0.16)
0.7(0.31)
Soil Temperature
The mean soil temperature during the winter season was equal to -0.45 and +0.13°C in
stratum I and II, respectively (Figure 2). The snow cover during winter 2001-2002 was less
than 10 cm thick until December 26
th
and then reached 50 cm for the remaining winter season
(Delaloye et al., 2003). The minimum soil temperature in stratum I (-3.6°C) was registered
after the snow fall (January 9-12, 2002), whereas in the other stratum the minimum value (-
1.6°C) occurred on December 24, 2001. The presence of a deep snow cover was able to
increase the soil temperature to 0°C only from January 30
th
to May the 8
th
in stratum I, while
for the other stratum the snow insulation effect started previously, from the 28
th
of December.
