Kim et al.

TFC = FC×TFI

where, TFI=total feed intake and FC=feed cost

TWG=total weight gain per pig (kg).

Statistical analyses

Data generated in the present experiment were analyzed as a randomized complete

block design using the GLM procedure of SAS (SAS Institute Inc., Cary, NC).

Orthogonal polynomials were used to evaluate linear and quadratic effects of

dietary increasing levels (0, 4, 8 and 12%) domestic CM. The pen was used as the

experimental unit for the analysis of growth performance and nutrient digestibility.

Probability values of < 0.05 were considered significant.

RESULTS

Chemical composition

Chemical composition of domestic canola meal is presented in Table 1. It contains

88.63% DM, 37.77% CP, 9.5% crude fiber, 0.66% calcium, 1.03% P and 2.09%

lysine. Canola meal was included in diets with equal replacement of soybean

meal. All experimental diets were formulated to contain 3,350 Kcal ME, 15.50%

CP and 0.85% lysine (Table 2).

Growth performance

Effect of dietary inclusion of canola meal on growth performance is presented in

Table 3. Dietary increasing levels of canola meal had no effects (P>0.05) on final

body weight and overall (d 0-35) ADG, ADFI and F:G of finishing pigs. All pigs

remained in good health during experimental period and there was no mortality

in any group.

Nutrient digestibility

Effects of dietary inclusion of canola meal on ATTD of nutrients and energy are

presented in Table 4. Dietary inclusion of increasing levels of domestic canola

meal had no effects (linear or quadratic; P>0.05) on ATTD of DM, CP, GE and

ash. Also digestibility of all nutrients remained within normal range.

Economic analysis

Dietary inclusion of increasing levels of CM has resulted in reducing (linear;

P<0.05) the total feed cost TFC of finishing pigs (Table 5). Dietary inclusion of

160

Journal of Animal Research: v.4 n.2. Dec. 2014