EXPERIMENT 1: EFFECT OF CASSAVA AS A CORN SUBSTITUTE ON GROWTH PERFORMANCE, NUTRIENT DIGESTIBILITY, AND BLOOD PROFILE IN WEANLING PIGS Three experiments were conducted to evaluate the effect of cassava as a corn substitute on growth performance, nutrient digestibility, and blood profile in pigs. In ...
EXPERIMENT 1: EFFECT OF CASSAVA AS A CORN SUBSTITUTE ON GROWTH PERFORMANCE, NUTRIENT DIGESTIBILITY, AND BLOOD PROFILE IN WEANLING PIGS Three experiments were conducted to evaluate the effect of cassava as a corn substitute on growth performance, nutrient digestibility, and blood profile in pigs. In Exp. 1, 96 weanling pigs (6.44 ± 0.52 kg; 28 d of age) were used in a 42-d trial to evaluate the cassava hard pellet as a replacement for corn. In Exp. 2, a 42-d experiment with 96 growing pigs (25.10 ± 2.01 kg) was conducted to determine the effect of cassava residue as a replacement for corn at two levels (20% and 40%) as compared with the corn-SBM diet. In Exp. 3, a 2×2 factorial design with 96 finishing pigs (54.74 ± 2.08kg) was carried out to assess the influence of different energy and enzyme supplementation regimes on the growth performance and digestibility of a 25% cassava hard pellet based diet. In Exp. 1, the corn-SBM diet resulted in a higher ADG (334 vs. 285g) and G/F ratio (0.657 vs. 0.576) than cassava replacement treatment (P0.05) during 14-28d. In the overall the experimental periods, ADG was lower in the cassava replacment treatment relative to corn-SBM based treatment (P<0.05). Moreover, the corn-SBM treatment was higher in terms of dry matter and nitrogen digestibility relative to the cassava replacement treatment at the end of week 2 (P0.05). On day 4, the concentration of WBC was reduced linearly with increasing cassava level (P<0.05). In Exp. 3, during days 0-14, enzyme supplementation resulted in a higher ADG (P=0.07), ADFI (P=0.01) and G/F ratio (P0.10) was observed during days 14-28. Overall, the inclusion of enzyme resulted in higher ADFI (P=0.03) and G/F ratio (P<0.01). Higher energy resulted in a higher ADG (P=0.08) and G/F ratio (P<0.01). Pigs fed on the lower energy diet reduced the apparent total tract digestibility of dry matter, nitrogen, energy, ether extract, crude fiber, ash, calcium, and phosphorus compared with those fed on the original energy diet (P<0.05). Dietary enzyme supplementation increased nutrient digestibility (P<0.05), except for nitrogen, relative to the non-enzyme supplementation diets. In conclusion, cassava as a corn replacement can be used in weanling pigs without corn (around 30%) after 2 weeks of weanling without negative effects on growth performance and nutrient digestibility. In growing pigs, cassava can be used at concentrations of up to 40% without negative effects on growth performance. Additionally, finishing pigs can use 25% cassava. Furthermore, enzyme supplementation can induce lower ADFI without growth performance.EXPERIMENT 2: EFFECT OF CASSAVA AS A CORN SUBSTITUTE ON EGG PRODUCTION, EGG QUALITY, AND STORAGE CHANGES IN LAYING HENS This study was conducted to evaluate the effect of cassava as corn substitute on egg production, egg quality, and storage changes in laying hens. A total of 240 (ISA brown) 47 week old layers were allocated into the following four treatments: 1) CON (basal diet), 2) C5 (5% of cassava diet), 3) C10 (10% of cassava diet), 4) C20 (20% of cassava diet), and 5) C30 (30% of cassava diet). The laying hens were allotted into 1 of 5 dietary treatments with 24 replicate pens and two laying hens per pen. The experiment was conducted via a completely randomized design and studied for 35 days. Egg production was reduced significantly in the C30 relative to other treatments (P0.05). However, in terms of egg yolk color, the C20 and C30 treatments evidenced dramatic reductions from the 2nd and 1st week (P0.05), however, the feed/gain ratio was higher in the C10 and C20 treatments as compared with the C5 treatment (P0.05). In conclusion, the result of this study demonstrated that cassava can be used as a dietary energy source in Korean native broilers, at concentrations of up to 20% without any adverse effect on performance.
EXPERIMENT 1: EFFECT OF CASSAVA AS A CORN SUBSTITUTE ON GROWTH PERFORMANCE, NUTRIENT DIGESTIBILITY, AND BLOOD PROFILE IN WEANLING PIGS Three experiments were conducted to evaluate the effect of cassava as a corn substitute on growth performance, nutrient digestibility, and blood profile in pigs. In Exp. 1, 96 weanling pigs (6.44 ± 0.52 kg; 28 d of age) were used in a 42-d trial to evaluate the cassava hard pellet as a replacement for corn. In Exp. 2, a 42-d experiment with 96 growing pigs (25.10 ± 2.01 kg) was conducted to determine the effect of cassava residue as a replacement for corn at two levels (20% and 40%) as compared with the corn-SBM diet. In Exp. 3, a 2×2 factorial design with 96 finishing pigs (54.74 ± 2.08kg) was carried out to assess the influence of different energy and enzyme supplementation regimes on the growth performance and digestibility of a 25% cassava hard pellet based diet. In Exp. 1, the corn-SBM diet resulted in a higher ADG (334 vs. 285g) and G/F ratio (0.657 vs. 0.576) than cassava replacement treatment (P0.05) during 14-28d. In the overall the experimental periods, ADG was lower in the cassava replacment treatment relative to corn-SBM based treatment (P<0.05). Moreover, the corn-SBM treatment was higher in terms of dry matter and nitrogen digestibility relative to the cassava replacement treatment at the end of week 2 (P0.05). On day 4, the concentration of WBC was reduced linearly with increasing cassava level (P<0.05). In Exp. 3, during days 0-14, enzyme supplementation resulted in a higher ADG (P=0.07), ADFI (P=0.01) and G/F ratio (P0.10) was observed during days 14-28. Overall, the inclusion of enzyme resulted in higher ADFI (P=0.03) and G/F ratio (P<0.01). Higher energy resulted in a higher ADG (P=0.08) and G/F ratio (P<0.01). Pigs fed on the lower energy diet reduced the apparent total tract digestibility of dry matter, nitrogen, energy, ether extract, crude fiber, ash, calcium, and phosphorus compared with those fed on the original energy diet (P<0.05). Dietary enzyme supplementation increased nutrient digestibility (P<0.05), except for nitrogen, relative to the non-enzyme supplementation diets. In conclusion, cassava as a corn replacement can be used in weanling pigs without corn (around 30%) after 2 weeks of weanling without negative effects on growth performance and nutrient digestibility. In growing pigs, cassava can be used at concentrations of up to 40% without negative effects on growth performance. Additionally, finishing pigs can use 25% cassava. Furthermore, enzyme supplementation can induce lower ADFI without growth performance.EXPERIMENT 2: EFFECT OF CASSAVA AS A CORN SUBSTITUTE ON EGG PRODUCTION, EGG QUALITY, AND STORAGE CHANGES IN LAYING HENS This study was conducted to evaluate the effect of cassava as corn substitute on egg production, egg quality, and storage changes in laying hens. A total of 240 (ISA brown) 47 week old layers were allocated into the following four treatments: 1) CON (basal diet), 2) C5 (5% of cassava diet), 3) C10 (10% of cassava diet), 4) C20 (20% of cassava diet), and 5) C30 (30% of cassava diet). The laying hens were allotted into 1 of 5 dietary treatments with 24 replicate pens and two laying hens per pen. The experiment was conducted via a completely randomized design and studied for 35 days. Egg production was reduced significantly in the C30 relative to other treatments (P0.05). However, in terms of egg yolk color, the C20 and C30 treatments evidenced dramatic reductions from the 2nd and 1st week (P0.05), however, the feed/gain ratio was higher in the C10 and C20 treatments as compared with the C5 treatment (P0.05). In conclusion, the result of this study demonstrated that cassava can be used as a dietary energy source in Korean native broilers, at concentrations of up to 20% without any adverse effect on performance.
주제어
#NON-RUMINANT ANIMALS CASSAVA CORN SUBSTITUTE
※ AI-Helper는 부적절한 답변을 할 수 있습니다.