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