Nitrogen Use Efficiency and Gaseous Nitrogen Losses from the Concentrated Liquid Fraction of Pig Slurries
Table 1
Composition of the tested products (expressed on basis of fresh weight).
Experiment
Product1
Dry matter (g·kg−1)
N (g·N·kg−1)
NH4-N (g·N·kg−1)
NH4-N/total N
P (g·P·kg−1)
pH
Incubation
Pig slurry A
92
7.7
4.8
0.62
1.8
8.2
Pig slurry B
89
6.9
4.5
0.65
1.8
7.7
Pig slurry C
84
6.8
4.5
0.66
1.7
7.3
Pig slurry D1
92
5.3
2.9
0.54
2.7
7.5
Average
89
6.7
4.2
0.62
2.0
7.7
MC A
18
6.6
4.1
0.62
0.6
8.6
MC B
46
7.7
7.4
0.96
0.0
7.7
MC C
46
9.1
7.7
0.85
0.4
7.9
MC D1
24
5.5
5.1
0.92
0.1
7.9
Average
34
7.2
6.1
0.84
0.3
8.0
Solid fraction A
272
11.1
6.2
0.56
6.7
n.a.2
Solid fraction B
290
12.4
5.2
0.42
6.3
n.a.
Solid fraction C
313
12.9
5.1
0.40
7.3
n.a.
Solid fraction D1
259
11.1
4.4
0.39
7.5
8.2
Average
284
11.9
5.2
0.44
7.0
8.2
Pot
Slurry D2
71
6.3
4.1
0.65
1.5
7.7
MC D2
58
8.0
7.1
0.89
0.3
7.9
1The different manure treatment plants are indicated with A, B, C, and D. D1 (used in the incubation experiment) and D2 (used in the pot experiment) represent different sampling times at plant D. 2n.a.: not analysed.
