사료내 Cu-methionine Chelate와 Cu-soy Proteinate가 산란계의 생산성, 소장내 미생물 균총 및 면역체계에 미치는 영향 (Effect of Dietary Supplementation of Cu-methionine Chelate and Cu-soy Proteinate on the Performance, Small Intestinal Microflora and Immune Response in Laying Hens)

서지정보

· 발행기관 : 한국가금학회
· 수록지 정보 : 한국가금학회지 / 35권 / 3호 / 303 ~ 311페이지
· 저자명 : 백인기, 김찬호, 박광월

초록

This study was conducted to investigate the effect of dietary supplementation of Cu-methionine chelate (Cu-Met) and Cu-soy proteinate (Cu-SP) on the performance, small intestinal microflora and immune response in laying hens. A total of 960 Hy-line Brownⓡ laying hens of 39 wks old were assigned to one of the following 6 dietary treatment: control (C), antibiotic(Avilamycine 6 ppm), Cu-Met 50 and Cu-Met 100 (50 and 100 ppm Cu as Cu-methionine chelate), Cu-SP 50 and Cu-SP 100 (50 and 100ppm Cu as Cu-soy proteinate). Each treatment was replicated 4 times with forty birds per replication, housed in 2 birds per cages. Forty birds units were arranged according to randomized block design. Feeding trial lasted 6 wks under 16 hours lighting regimen. Hen-day and hen-house egg production of groups treated with Antibiotic and Cu supplements tended to be higher than the control with significant difference (P<0.05) shown between Cu-Me 100 and control. Egg weight was significantly (P<0.05) heavier in antibiotic and Cu-SP treatments than Cu-Met treatments but they were not significantly different from the control. Eggshell
strength, egg shell thickness, egg yolk color and Haugh unit were not significantly different among treatments. There were no significant differences in leukocytes and erythrocytes in the chicken blood. But mean corpuscular hemoglobin value (MCH) was significantly (P<0.05) higher in Cu-SP 100 than antibiotic treatment. The concentrations of serum IgG and IgA were not significantly different among treatments. Copper concentration in the liver tended to increase as the level of copper supplementation increased,
that of Cu-SP 100 being significantly (P<0.05) higher than those of the control and antibiotic treatment. Concentrations of iron and zinc of the liver were not significantly influenced by treatments. Populations of Cl. perfringens and Lactobacilli in the small intestinal content were significantly (P<0.05) influenced by treatments. Population of Cl. perfringens decreased and that of Lactobacilli increased in the copper supplemented groups. The result of this experiment showed that Cu-Met and Cu-SP are comparable to antibiotic in improving egg production in laying hens. Birds fed diets supplemented with Cu-SP produced heavier eggs than those fed diets with Cu-Met. There were no significant differences in the performances between 50 ppm and 100 ppm copper supplementation as organic forms.

영어초록

This study was conducted to investigate the effect of dietary supplementation of Cu-methionine chelate (Cu-Met) and Cu-soy proteinate (Cu-SP) on the performance, small intestinal microflora and immune response in laying hens. A total of 960 Hy-line Brownⓡ laying hens of 39 wks old were assigned to one of the following 6 dietary treatment: control (C), antibiotic(Avilamycine 6 ppm), Cu-Met 50 and Cu-Met 100 (50 and 100 ppm Cu as Cu-methionine chelate), Cu-SP 50 and Cu-SP 100 (50 and 100ppm Cu as Cu-soy proteinate). Each treatment was replicated 4 times with forty birds per replication, housed in 2 birds per cages. Forty birds units were arranged according to randomized block design. Feeding trial lasted 6 wks under 16 hours lighting regimen. Hen-day and hen-house egg production of groups treated with Antibiotic and Cu supplements tended to be higher than the control with significant difference (P<0.05) shown between Cu-Me 100 and control. Egg weight was significantly (P<0.05) heavier in antibiotic and Cu-SP treatments than Cu-Met treatments but they were not significantly different from the control. Eggshell
strength, egg shell thickness, egg yolk color and Haugh unit were not significantly different among treatments. There were no significant differences in leukocytes and erythrocytes in the chicken blood. But mean corpuscular hemoglobin value (MCH) was significantly (P<0.05) higher in Cu-SP 100 than antibiotic treatment. The concentrations of serum IgG and IgA were not significantly different among treatments. Copper concentration in the liver tended to increase as the level of copper supplementation increased,
that of Cu-SP 100 being significantly (P<0.05) higher than those of the control and antibiotic treatment. Concentrations of iron and zinc of the liver were not significantly influenced by treatments. Populations of Cl. perfringens and Lactobacilli in the small intestinal content were significantly (P<0.05) influenced by treatments. Population of Cl. perfringens decreased and that of Lactobacilli increased in the copper supplemented groups. The result of this experiment showed that Cu-Met and Cu-SP are comparable to antibiotic in improving egg production in laying hens. Birds fed diets supplemented with Cu-SP produced heavier eggs than those fed diets with Cu-Met. There were no significant differences in the performances between 50 ppm and 100 ppm copper supplementation as organic forms.

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