This study was conducted to determine the effects of dietary bentonite supplementation on the fatty acid profiles of eggs in older laying hens. A total of 90 Hy-line Brown layers, 74 weeks of age, were confined in 6 wire cages and then assigned randomly to two groups to receive one of the two diets (3 replicates of 15 older layers each) containing 0 and 0.2% bentonite for 4 weeks. After the 4-week feeding trial, no remarkable differences in individual fatty acid, saturated fatty acid (SFA), unsaturated fatty acid (UFA), and mono unsaturated fatty acid (MUFA) levels were found. However, linoleic acid, docosahexaenoic acid, and poly unsaturated fatty acid (PUFA) and UFA/SFA ratio were influenced by 0.2% bentonite. In conclusion, supplementation with 0.2% bentonite improved the profiles of PUFA more than those of SFA, UFA, and MUFA inthe eggs of the older laying hens.

Abstract
 1. 서 론
 2. 연구방법
  2.1. 사양시험 및 시험설계
  2.2. 계란 지방산분석
  2.3. 통계처리
 3. 결과 및 고찰
 4. 결 론
 REFERENCES

• 최인학(중부대학교 애완동물자원학과) | In Hag, Choi (Department of Companion Animals and Animal Resources Science, Joongbu University) Corresponding author