Earticle

초록

영어

The present study was conducted to determine the optimal supplementation level of beta-mannanase in the diet of laying hens. A total of 320 Hy-Line Brown layers (80 weeks of age) were assigned randomly into four groups on the basis of laying performance. Each treatment had eight replicates with 10 birds each (80 birds per treatment). Two hens were caged individually. Treatments were basal diet supplemented with 0 (control), 0.04, 0.08, and 0.16% beta-mannanase during the nine-week feeding period. Laying hens fed diets supplemented with increasing levels of beta-mannanase had increased (linear, p<0.05) overall egg production and egg mass. In addition, these hens had greater retention of dry matter, crude protein, gross energy, calcium, and mannan (linear, p<0.05). Dietary beta-mannanase treatments had no effect on blood metabolites such as total carbohydrate, triglycerides, glucose, total protein, and blood urea nitrogen, or excreted ammonia nitrogen and volatile fatty acids. The results obtained in present study indicate that dietary supplementation of beta-mannanase has the potential for improving the performance of laying hens. The optimal supplementation level is 0.04% beta-mannanase in the diet.

목차

ABSTRACT
 Ⅰ. 서론
 Ⅱ. 재료 및 방법
  1. 시험동물 및 시험설계
  2. 시험사료와 사양관리
  3. 조사항목 및 방법
  4. 통계처리
 Ⅲ. 결과 및 고찰
  1. 난 생산성과 영양소 소화율
  2. 혈액성상
  3. 분내 휘발성 지방산(VFA) 및 NH4-N 함량
 Ⅳ. 요약
 사사
 Ⅴ. REFERENCES

저자

• 심영호 [ Young Ho Shim | ㈜사조바이오피드 ]
• 류명현 [ Myung Hyun Ryu | 강원대학교 동물생명과학대학 ]
• 김진수 [ Jin Soo Kim | 강원대학교 동물생명과학대학 ]
• Hosseindoust Abdolreza [ 강원대학교 동물생명과학대학 ]
• 최요한 [ Yo Han Choi | 강원대학교 동물생명과학대학 ]
• 김민주 [ Min Ju Kim | 강원대학교 동물생명과학대학 ]
• 오승민 [ Seung Min Ohh | 강원대학교 동물생명과학대학 ]
• 채병조 [ Byung Jo Chae | 강원대학교 동물생명과학대학 ] Corresponding author

참고문헌