Agriculture Reference
In-Depth Information
(a)
25
20
15
10
5
0
0
1
2
3
4
5
6
7
(b)
1800
1600
1400
1200
1000
800
600
400
200
0
0
1
2
Soil organic matter concentration (%)
3
4
5
6
7
Fig. 27.3. Total seasonal emission of (a) N 2 O and (b) CH 4 across the SOM level from rice paddies of China
measured in the time span of 1990-2010.
Healthy microbial communities
and ecosystem functioning with SOM
accumulation
particularly of Cd, has been well addressed
in experiments and modelling (Sauve, 1999;
Jansen et  al ., 2001). The effect of SOM on
organic pollutants has been investigated
less frequently in field soils. In the same long-
term experiment as reported by Pan (2009),
the contents of soil polycyclic aromatic hy-
drocarbons (PAHs) were significantly lower
in plots receiving organic amendments of
A healthy ecosystem can be characterized
by low levels of pollutants and reduced
GHG emissions, especially in relation to
the C intensity of agricultural production.
The control of SOM on metal mobility,
 
 
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