Agriculture Reference
In-Depth Information
Table 2.1. Studies comparing the effects of a low and a high feeding level on pregnancy rate, embryo survival
and litter size born.
Parity
c
Source
Stage of gestation
Feed allowance, kg
Pregnancy rate, %
Embryo survival, %
Low
High
Low
High
Low
High
Pre-implantation
Jindal
et al.
, 1997
D3-5
1.7
2.3
87
74
**
Soede
et al.
, 1999
D5-10
2.5
4
76
81
74
78
Athorn
et al.
, 2012b
D10
1.4
2.9
77
92
**
Jindal
et al.
, 1997
D11-12
1.7
2.3
81
72
Ashworth
et al.,
1999
D12
1.15
3.5
100
92
86
83
Post-implantation
Condous
et al.,
2013
D25
1.4
2.1
78
88
**
Quesnel
et al.,
2010
D27
2
4
87
100
87
84
Pharazyn
et al.,
1991
D28
1.2
1.9
86.5
82.5
Jindal
et al.,
1996
D28
1.9
2.6
84.7
64.5
**
Dyck and Strain
et al.,
1983
D30
1.5
2.5
64
87
**
87
76
**
Toplis
et al.,
1983
D30
2
4
100
100
75
72
MP
Virolainen
et al.,
2004
D35
2.1
4.3
25
100
**
91
70
Athorn
et al.,
2011a
D35
1.4
2.8
95
65
73
**
Athorn
et al.,
2012a
D35
1.4
2.8
94
91
80
77
Hoving
et al.,
2012
D35
2.5
3.25
87
95
72
73
P1
Term
Litter size
Langendijk
et al.,
2011
1.6
3.2
83
91
a
11.5
11.2
Athorn
et al.,
2011b
2.0
3.0
97
95
a
12.1
12.2
P1
83
b
Hughes, unpublished
1.9
2.8
70
**
P1
Low gain
a
98
b
Athorn
et al.,
2013
High gain
92
**
11.1
11.6
P1, P2
Sawyer
et al.,
2013
Intake d11-20
90
b
1.6-2
>2.5
79
**
P1
92
b
Intake d21-30
1.6-2
>2.5
50
**
Sawyer
et al.,
2013
Intake d2-10
90
b
1.6-2
>2.5
76
**
P2
90
b
Intake d11-20
1.6-2
>2.5
52
**
93
b
Intake d20-30
1.6-2
>2.5
43
**
88
b
Sorensen, 2013
2.3
4.6
85
17.5
17.5
MP
a
When classified according to growth rate, sows with a lower growth rate had a lower chance of pregnancy.
b
Farrowing rate.
c
P1 = first litter sows; P2 = second parity sows; MP = multiparous sows; otherwise gilts.
** = Significant difference at
P
<0.05.
