이유자돈에서 건조 유청 대체를 위한 옥수수 전분 가공제품 Bio-starch의 급여 평가

Abstract

This study was conducted to evaluate the effect of bio-starch from corn processing to replace dried whey in weaned pigs. A total of 120 crossbred ((Landrace × Yorkshire) × Duroc) pigs were weaned at 21 days of age weighing 6.01 ± 0.34 kg in average. Five week feeding trial consisted of phase 1 (0~2 wks) and phase 2 (3~5 wks). Dietary treatments included 1) CON (basal diet), 2) BS5 (whey 5%, partial substitution of bio-starch), 3) BS10 (whey 10%, partial substitution of bio-starch) and 4) BS15 (whey 15%, partial substitution of bio-starch). There were four dietary treatments with six replicate pens per treatment and five pigs per pen. During the overall period, there were no significant differences in the ADG (average daily gain) and gain/feed ratio among the treatments (P>0.05). However, the ADFI (average daily feed intake) was higher in BS5 and BS15 treatments than in CON treatment (P<0.05). At the 2 nd week, dry matter and nitrogen digestibility were increased (quadratic effect, P=0.03 and P=0.01, respectively; cubic effect, P<0.001 and P=0.01, respectively) with the highest at 10% of bio-starch inclusion in the diets. At the last week of the experiment, dry matter, nitrogen and energy digestibility were increased (P<0.05) with the highest at 5% of bio-starch inclusion in the diets. At the 2 nd week total protein concentration was increased (linear effect, P=0.04; cubic effect, P=0.01) with the highest at 10% of bio-starch inclusion in the diets. Also, BUN (blood urea nitrogen) was increased (linear effect, P=0.01) as the level of bio-starch inclusion increased in the diets. Fecal consistency score was inclined to lowers CON treatment than other treatments. In conclusion, the result of trial indicates that bio-starch can be included at the level of 5~10% of weaning pig diet replacing part of the dried-whey, and digestibilities were positively affected by bio-starch at growth stage.