Canola Meal in finishing pig diet
Table 3. Effects of dietary inclusion of domestic canola meal on growth performance of
finishing pigs
Domestic canola meal (%)
P-value
Item
SEM 1
0
4
8
12
Linear
Quadratic
Initial BW (kg)
49.20
49.01
49.01
49.08
0.20
0.719
0.550
Final BW (kg)
82.80
82.31
82.14
81.97
0.33
0.085
0.621
ADG (g)
960
951
947
940
10.54
0.205
0.942
ADFI (g)
2,673
2,658
2,651
2,678
15.08
0.908
0.212
FCR
2.78
2.79
2.80
2.85
0.03
0.212
0.586
1 Standard error of means.
Experimental procedure and chemical analyses
The pigs were individually weighed and consumption of feed in each pen was
measured at the end of the experiments. Growth performance in terms of average
daily gain (ADG), average daily feed intake (ADFI) and feed conversion ratio
(FCR) was calculated during the feeding trial. Feed samples from each dietary
treatment were collected and analyzed for proximate chemical compositions. To
evaluate the effects of dietary treatments on the ATTD of energy and nutrients,
0.25% chromic oxide (an inert indigestible indicator) were included in each diet
from d 28 to 35 of each experiment. Fecal grab samples were collected from the
floor of each pen during last 4 days of each experiment to determine the ATTD of
DM, GE and CP. The fecal samples were pooled within pen and dried in a forced
air drying oven at 60°C for 72 h, and ground in a Wiley mill (Thomas Model 4
Wiley Mill, Thomas Scientific, Swedesboro, NJ) using a 1-mm screen and used
for chemical analysis.
Experimental diets and excreta samples were analyzed in triplicate for DM
(Method 930.15), CP (Method 990.03), ash (Method 942.05), Ca and P (Method
985.01) according to theAOAC (2007) methods. Gross energy of diets and excreta
were measured using a bomb calorimeter (Model 1261, Parr Instrument Co.,
Molin, IL), while chromium concentrations were determined with an automated
spectrophotometer (Jasco V-650, Jasco Corp., Tokyo, Japan) according to the
procedure described by Fenton and Fenton (1979).
Economic analyses
The feed cost (FC) was calculated based on the price of ingredients used and then
employed to calculate the feed cost per kg body weight gain (FCG) and total feed
cost (TFC) as follows:
FCG = TFI×FC/TWG
Journal of Animal Research: v.4 n.2. Dec. 2014
159