Effects of Supplementary Copper Sources (Cu Sulfate, Cu-Methionine, Cu-Soy Proteinate) on the Performance Broiler Chickens

This work was carried out to investigate performance and carcass yield of large-type broilers at different stocking densities. Treatments were T1 (9.1 birds/m 2 ), T2 (10.3 birds/m 2 ) and T3 (11.5 birds/m 2 ) by the stocking density. Four hundred eight 1-day-old Arbor Acre broiler chicks were used for six weeks (starter, 0～1 wks; earlier, 1～3 wks; finisher, 3～6 wks) and divided into 3 treatments (4 replications/treatment, 30, 34 or 38 birds/replication). Research indexes were rearing viability ratio, body weight, body weight gain, feed intake, feed conversion ratio, production efficiency factor and carcass ratio. Rearing viability ratio (%) was 89% or more for all treatments and there was no significant difference on weekly rearing viability ratio (%). Body weight of T2 was the greatest and that of T3 was the lowest at 1 weeks old (P<0.05). Body weight gain of T2 was the greatest and that of T3 was the lowest at 0～1 weeks old (P<0.05). However, body weight gain of T3 was the greatest and that of T1 was the lowest at 1～2 weeks old (P<0.05). Body weight gain of T2 was the greatest as 3,031 g among treatments at 0～6 weeks old (P<0.05). Feed intakes of T1, T2 and T3 were 1,417 g, 1,265 g and 1,355 g, respectively, and that of T1 was the greatest among treatments (P<0.05). There was no significant difference on body weight, body weight gain and feed intake. Feed conversion ratio of T1 was the greatest among treatments at 1～2 wks, 3～4 wks and 0～6 wks old (P<0.05). Production efficiency factors of T1, T2 and T3 were 363.5, 388.3 and 358.3, respectively, and there was no significant difference among treatments. Wing meat ratio of T1 was the higher compared to other treatments at the age of 4 wk (P<0.05). There was no significant difference on carcass ratio and partial meat ratio among treatments. Neck meat ratio of T2 was the lowest among treatments (P<0.05). This result may provide the standard data of different stocking densities for large-type broiler and the further research is needed.(Key words : large-type broiler, performance, carcass ratio) † To whom correspondence should be addressed : drhong@rda.go.kr 서 론 육계 산업에서 사육 밀도의 증가는 노동력, 계사 및 설비와 관련된 비용을 절감시키는데 사용되는 경영 방식이다. 그러 나 사육밀도가 높아지면 결과적으로 증체량, 사료 섭취량 및 사료 요구율과 같은 성장 생산성이 감소된다 (Puron et al., 1995;Feddes et al., 2002;Dozier et al., 2005Dozier et al., , 2006Estevez, 2007). 게다가, 가슴육과 같은 부분육 생산은 높은 사육밀도 에 의해 감소된다 (Dozier et al., 2006).사육밀도가 높아지면 육계의 복지 상태에 악영향을 미친 다. 육계의 성장과 건강은 사육밀도에 영향을 받기 때문에 (Webster, 1990)

Performance and Carcass Ratio of Large-type Female Broiler at Different Stocking Densities

Na¹,

HwangBoa²,

Kim³

et al. 2012

Growth Performance and Carcass Yield of Heavy Female Broiler at Different Stocking Densities

Na¹,

Choo²,

Kim³

et al. 2013

This work was carried out to investigate performance and carcass yield of large-type broiler females at different stocking densities. Chicks (n = 492; 1-day-old; female; Arbor Acre broiler) were reared for six weeks (starter, 0～1 wk; earlier, 1～3 wk; finisher, 3～6 wk) and randomly divided into 3 treatments (4 replications/treatment, 36, 41 or 46 birds/replication). Treatments were T1 (10.9 birds/m 2 ), T2 (12.4 birds/m 2 ) and T3 (13.9 birds/m 2 ) by the stocking densities. Research indexes were livability, body weight, body weight gain, feed intake, feed conversion ratio, production efficiency factor, carcass yield and primal cuts ratio (wing, leg, back, breast and neck). Livability (%) was 90% or more for all treatments, but there was no significant difference on weekly livability (%). Body weight of T3 treatment were the lowest at 3 wk and body weight gain, feed intake, and feed conversion ratio were the lowest at 2～3 wk (P<0.05). Production efficiency factors of T1, T2 and T3 were 331.0, 340.8 and 336.0, respectively, and there was no significant difference among treatments. Leg meat ratio of T2 treatment was higher compared to other treatments at the age of 4 wk (P<0.05). Carcass yield of T1 treatment was the highest as 76.2% at the age of 5 wk (P<0.05). However, there was no significant difference on carcass ratio and partial meat ratio among treatments at the age of 6 wk. This result may provide the standard data of different stocking densities for heavy female broilers.(Key words : large-type broiler, female, performance, carcass ratio, partial meat ratio) a First two authors equally contributed to this work. † To whom correspondence should be addressed : drhong@rda.go.kr

Effects of Supplementary Cu-Soy Proteinate (Cu-SP) and Herbal Mixture (HBM) on the Growth Performance, Intestinal Microflroa, Immune Response in Broilers

Kim¹,

Shin²,

Kang³

et al. 2014

The objective of this experiment was to investigate the effect of dietary supplementation of copper-soy proteinate (Cu-SP) and herbal mixture (HBM) on growth performance, intestinal microflora, and immune response in broiler. A total 1,000 1-d old ROSS 308 (initial BW = 41 ± 0.38 g) were randomly allotted to 1 of 5 dietary treatments with 4 replicates during d 35 of the feeding trial. Dietary included: (1) Control : control diet, (2) Antibiotics : control diet + Avilamycin 6 ppm, (3) Cu-SP : control diet + 100 ppm Cu-soy proteinate, (4) HBM : control diet + 0.15% herbal mixture, (5) Cu-SP+HBM : control diet + 100 ppm Cu-soy proteinate + 0.2% herbal mixture. Two-phase feeding program with a starter diet from d 0 to 21, and a finisher diet from d 22 to 35 was used in the experiment. Within each phase, a diet was formulated to meet or exceed NRC requirements of broilers for macro-and micronutrients. The diet and water were available ad libitum. Result indicated that during d 22 to 35 and over all periods of the experiment, feed intake and feed conversion ratio were greater (P<0.05) for other treatment than control. Significant differences were found in lymphocyte (LY), and stress indicator (HE:LY ratio). Lymphocyte was greater (P<0.05) for Cu-SP + HBM treatment than control. However, stress indicator (HE:LY ratio) were greater (P<0.05) for control than Cu-SP + HBM treatment. The plasma IgG was higher (P<0.05) in the antibiotics, HBM, and Cu-SP+HBM treatments groups compared with control. The population of Clostridium perfringens in the antibiotics, Cu-SP, HBM, Cu-SP + HBM treatment groups were lower (P<0.05) than those control. These result suggested that dietary copper-soy proteinate or herbal mixture may be used as an alternative to antibiotics to improve growth performance, and intestinal health of birds.