Nitrogen Use Efficiency and Gaseous Nitrogen Losses from the Concentrated Liquid Fraction of Pig Slurries
Table 2
Total ammonia and nitrous oxide emissions from different fertilizers and application techniques.
Fertilizer
Ammonia emission (mg N m−2)
Nitrous oxide emission (mg N m−2)
Surface applied
Incorporated
Surface applied
Incorporated
Control
−1
aa
−1
0
ab
0
a
Calcium ammonium nitrate
12
ab
4
5
bc
30
bc
Urea
229
ghij
8
156
gh
248
gh
Urean
15
bc
2
76
fg
47
bcde
Slurry A
285
hijk
12
53
def
97
def
MC A
360
ijk
−1
18
cd
179
fgh
Solid fraction A
173
fghi
0
12
bc
15
ab
Slurry B
316
ijk
13
78
efg
124
efg
MC B
125
fg
0
11
bc
129
fg
Solid fraction B
84
ff
−4
0
a
86
def
Slurry C
284
hijk
9
31
cdef
82
def
MC C
493
k
6
27
cde
167
fg
Solid fraction C
45
de
6
8
bc
43
bcd
Slurry D
155
fgh
10
193
h
297
hi
MC D
470
jk
−2
63
ef
111
cdef
Solid fraction D
32
cd
−1
431
i
646
i
One-way ANOVA
Fertilizer
Two-way ANOVA
Fertilizer
; l.s.d.1 = 0.66
; l.s.d.1 = 0.25
Application method
; l.s.d.1 = 0.23
; l.s.d.1 = 0.09
Fertilizer × method
; l.s.d.1 = 0.93
; l.s.d.1 = 0.36
1l.s.d. of log-transformed values. Results of an incubation experiment with samples from an arable sand soil. The statistics and least significant difference (l.s.d.) values are based on log-transformed values. Different letters indicate statistical significant differences between fertilizers.
