Agriculture Reference
In-Depth Information
Table 4.1.
Change in the average requirements for energy, standardized ileal digestible lysine and apparent
fecal digestible phosphorus (P) of sows according to parity.
a
Parity
1
2
3
4
5
6
Gestation (thermoneutrality)
Energy (ME MJ/day)
33.5
37.2
37.5
36.6
36.3
36.0
Digestible lysine
g/day
13.5
12.9
12.2
11.8
11.6
11.4
g/kg feed
b
5.14
4.41
4.16
4.11
4.06
4.03
Digestible P
g/day
7.1
7.4
7.4
7.1
6.9
6.8
g/kg feed
b
2.67
2.54
2.52
2.47
2.43
2.40
Lactation (2.7 kg/day litter gain)
Energy (ME MJ/day)
Requirement
90.1
94.9
100.0
102.0
101.0
99.3
Intake
68.1
78.8
86.2
86.2
86.2
86.2
Intake, % requirement
75%
83%
86%
85%
85%
87%
Digestible lysine
g/day
43.3
44.6
46.5
46.5
45.8
44.9
g/kg feed
c
8.3
7.4
7.0
7.0
6.9
6.8
Digestible P
g/day
15.7
16.5
17.5
17.6
17.4
17.1
g/kg feed
c
3.22
2.93
2.84
2.86
2.83
2.77
Change in requirement (%)
Gestation (10°C)
ME supply
+24%
+25%
+27%
+29%
+30%
+31%
Lysine content
-19%
-20%
-21%
-22%
-23%
-24%
Lactation (3.0 kg/day litter weight gain)
ME supply
+11%
+10%
+10%
+10%
+10%
+10%
Lysine content
+10%
+10%
+10%
+10%
+10%
+10%
a
Calculated for a herd with an average productivity of
25
piglets weaned per sow per year, with sows with a mature body
weight of 270 kg and an average herd lactation feed intake of 6.2 kg/day.
b
For a diet containing 12.7 MJ ME/kg.
c
For a diet containing 13.0 MJ ME/kg.
Table 4.2.
Digestible phosphorus and SID lysine requirements of pregnant sows (parity 2).
End (
80-
114 days)
Gestation stage
Litter size
Beginning (0-80 days)
12
14
16
Digestible phosphorus
g/day
3.8
6.9
7.4
7.9
g/kg diet
1.4
2.5
2.6
2.8
SID lysine
g/day
8.9
11.9
12.7
13.6
g/kg diet
3.1
4.3
4.5
4.8
differing in average voluntary feed intake dur-
ing lactation (low (L): 5.0 and high (H): 7.0 kg/
day) were simulated over four successive
parities. Feed supply during gestation was
calculated so that sows attained mature body
weight (BW) at parity
4,
while maintaining a
backfat thickness (BT) of at least 13 mm. The
simulated evolution in BW and BT in these
two situations is given in
Fig. 4.3.
The BW
loss during lactation was much greater for L
