SWINE RATIONS
I. Breeding Herd
A. Boars
1. Protein requirement ↓ with maturity (18% at 50# to 14% at >220# BW)
2. Reduce energy intake during non-breeding season (add fiber, or restrict intake)
3. feed intake 10 to 14 days before breeding season
B. Sows & Gilts
1. Pregestation
a) feed replacement gilts with market hogs until 200 lb and then separate and restrict energy intake to 60-75% of ad-libitum until breeding. This allows for normal growth but decreases fat deposition.
2. Breeding
a) Gilts
(1) Flushing - increased energy intake around breeding (2 fold)
(a) 10 days before breeding and stop immediately after breeding
(b) improved health
(c) ovulation rate
(d) increased live embryos
b) Sows
(1) usually bred at first estrus after weaning; sow has been fed a high
energy lactation diet. Simply decrease intake at weaning
Formulate a ration for a 20 kg pig using corn & SBM:
1) Requirements
|
A-D intake (g/d) |
LYS (g/d) |
THR (g/d) |
DE (kcal/d) |
Ca (g/d) |
P (g/d) |
|
1425 |
11.65 |
7.2 |
4845 |
9.0 |
7.6 |
|
|
|
|
|
|
|
2) Feedstuff Nutrient Composition
|
|
LYS, % |
THR, % |
DE, kcal/kg |
Ca, % |
P, % |
|
Corn |
0.3 |
0.3 |
3492 |
0.02 |
0.29 |
|
SBM |
2.8 |
1.8 |
3483 |
0.26 |
0.62 |
3) Leave 3% for minerals and Lysine
1425 X .03 = 42.75 ===> 1425 - 42.75 = 1382.25
4) Balance for THR
X = g corn
1382.25 - X = g SBM
5)
.003(X) + .018(1382.25 - X) = 7.2
.003X + 24.88 - .018X = 7.2
-.015X = -17.68
X = 1178.7 corn
1328.25 - X = 203.6 SBM
|
|
LYS |
THR |
DE |
Ca |
P |
|
|
3.54 |
3.54 |
4116 |
.24 |
3.42 |
|
|
5.70 |
3.66 |
709 |
.53 |
1.26 |
|
Total |
9.24 |
7.2 |
4825 |
.77 |
4.68 |
|
Req. |
11.65 |
7.2 |
4845 |
9.0 |
7.6 |
|
|
-2.41 |
√ |
√ |
-8.23 |
-2.92 |
6) Add 2.4 g Lysine
7) need 2.92 g P / .18538 = 15.75 g Dical X .21811 = 3.44 g Ca
8) 8.23 - 3.44 = 4.79 g Ca still needed
9) 4.79 / .3711 = 12.92 g limestone
10) Final Ration:
|
|
1190.3 |
|
LYS |
THR |
DE |
Ca |
P |
|
+11.6 |
|
corn |
3.58 |
3.58 |
4171 |
.24 |
3.46 |
|
|
203.6 |
SBM |
5.7 |
3.66 |
709 |
.53 |
1.26 |
|
|
2.4 |
lysine |
2.4 |
0 |
0 |
0 |
0 |
|
|
15.75 |
dical |
0 |
0 |
0 |
3.44 |
2.92 |
|
|
12.92 |
lime. |
0 |
0 |
0 |
4.79 |
0 |
|
Total |
1413.4 |
|
11.68 |
7.24 |
4880 |
9.0 |
7.6 |
|
Need |
1425 |
|
11.65 |
7.2 |
4845 |
9.0 |
7.6 |
|
|
-11.6 |
|
√ |
√ |
√ |
√ |
√ |
therefore add 11.6 g corn