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Effect of Dietary Supplementation of Cu-methionine Chelate and Cu-soy Proteinate on the Performance, Small Intestinal Microflora and Immune Response in Laying Hens

사료내 Cu-methionine Chelate와 Cu-soy Proteinate가 산란계의 생산성, 소장내 미생물 균총 및 면역체계에 미치는 영향

  • Paik, I.K. (Department of Animal Science and Technology, College of Industrial Science, Chung-Ang University) ;
  • Kim, C.H. (Department of Animal Science and Technology, College of Industrial Science, Chung-Ang University) ;
  • Park, K.W. (Department of Animal Science and Technology, College of Industrial Science, Chung-Ang University)
  • 백인기 (중앙대학교 산업과학대학 동물자원과학과) ;
  • 김찬호 (중앙대학교 산업과학대학 동물자원과학과) ;
  • 박광월 (중앙대학교 산업과학대학 동물자원과학과)
  • Published : 2008.09.30

Abstract

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 $Brown^{(R)}$ 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.

본 실험은 Cu-methionine chelate(Cu-Met)와 Cu-soy proteinate(Cu-SP)가 산란계의 생산성과 소장내 미생물 균총 및 면역 체계에 미치는 영향을 조사하기 위해 실시하였다. 사양시험은 39주령의 산란계(Hy-line $Brown^{(R)}$) 960수를 선별하여 A형 2단 4열 케이지에 대조구 포함 총 6처리구로 구성하여 처리당 4반복, 반복당 40수씩(2수 수용 케이지 20개) 난괴법으로 임의 배치하였다. 시험 기간 동안 물과 사료는 자유 섭취하게 하였으며, 일반적인 점등 관리(자연 일조+조명; 16 hr)를 실시하였다. 시험구는 대조구, 항생제구(avilamycin 6 ppm), Cu- Met 50(Cu-methionine으로 Cu 50 ppm), Cu-Met 100(Cu- methionine으로 Cu 100 ppm), Cu-SP 50(Cu-soy proteinate로 Cu 50 ppm) 그리고 Cu-SP 100(Cu-soy proteinate로 Cu 100 ppm) 등 총 6처리였다. 일계 산란율(Hen-day egg production)과 산란지수(Hen-house egg production)는 Cu 첨가구들과 항생제 첨가구들이 대조구에 비해 높은 경향을 보였는데, 특히 Cu-Met 100 구는 대조구에 비하여 유의적으로(P<0.05) 높았으며 Cu 처리구들 간에 종류나 첨가 수준에 따른 차이는 유의하지 않았다. 난중에서는 항생제구와 Cu-SP 첨가구들이 대조구보다 무거운 경향을 보였고, Cu-Met 첨가구들보다는 유의하게(P<0.05) 무거웠다. 난각 강도, 난각 두께, 난각색, 난황색, Haugh unit 등 계란 품질에 있어서 처리구간에 유의적인 차이는 나타나지 않았다. Leukocytes와 erythrocytes 관련 모수들은 평균 적혈구 혈색소량(MCH)을 제외한 모든 항목에서 처리간에 유의적인 차이는 나타나지 않았다. MCH는 Cu-SP 100이 대조구와 비교하여 유의적으로 높았다(P<0.05). 혈청 IgG와 IgA의 농도는 처리구간에 유의적인 차이는 나타나지 않았다. 간 내 구리의 함량은 처리간에 유의한(P<0.05) 차이가 있었는데, 구리의 첨가 수준이 높을수록 높아지는 경향이 있었으며 같은 첨가 수준에서는 Cu-SP 첨가구들이 Cu-Met 첨가구들보다 높은 경향이 있었다. 소장 내용물 중 Cl. perfringens의 수는 항생제와 Cu 첨가구들이 대조구에 비해 적었고 E. coli 수는 첨가구들에서 감소하는 경향이 있었으며, Lactobacilli 수는 Cu 첨가구들이 대조구나 항생제구와 비교하였을 때 많았다. 결론적으로 Cu-Met와 Cu-SP는 산란계의 산란율 개선에 있어서 항생제와 유사한 효과를 나타내었다. Cu-SP는 Cu-Met보다 난중을 유의하게 증가시켰으나 다른 항목들에 있어서는 Cu 공급원(Cu-Met vs Cu-SP)과 첨가수준(50 vs 100 ppm)에 따른 유의적 차이는 없었다.

Keywords

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  2. Effects of Dietary Supplementation of Copper-Sulfate and Copper-Soy Proteinate on the Performance and Small Intestinal Microflora in Laying Hens vol.41, pp.4, 2014, https://doi.org/10.5536/KJPS.2014.41.4.241
  3. Effects of supplemental copper-methionine chelate and copper-soy proteinate on the performance, blood parameters, liver mineral content, and intestinal microflora of broiler chickens vol.20, pp.1, 2011, https://doi.org/10.3382/japr.2010-00177