This study was conducted to predict the energy requirements for maintenance and growth of female Korean black goats during their growth and pregnancy phases. Fifty female goats (18.7±0.27 kg) in their growth phase with an average age of 5 months were stratified by weight and randomly assigned into 5 groups. They were fed 5 diets varying in metabolic energy (ME) [2.32 (G1), 2.49 (G2), 2.74 (G3), 2.99 (G4), and 3.24 (G5) Mcal/kg] until they were 9-month-old. After natural breeding, 50 female goats (30.7±0.59 kg) were stratified by weight and randomly assigned into 5 groups. They were fed 5 diets varying in ME [2.32 (P1), 2.43 (P2), 2.55 (P3), 2.66 (P4), and 2.78 (P5) Mcal/kg]. The average feed intake ranged between 1.5 and 2.0% of the body weight (BW), and there was no significant difference between the treatment groups with goats in growth or pregnancy phases. Average daily gain (ADG) in diet demand during the growth phase increased with an increasing ME density and ranged from 46 to 69 g/d (p<0.01). Feed conversion ratio (FCR) improved with the ME density during the growth phase (p<0.01). The intercept of the regression equation between ME intake and ADG indicated that energy requirement for maintenance of goats during growth and pregnancy phases was 103.53 kcal/BW0.75 and 102.7 kcal/BW0.75, respectively. These results may serve as a basis for the establishment of goat feeding standards in Korea. Further studies are required to assess the nutrient requirement of goats using various methods for improving accuracy.

ABSTRACT
 Ⅰ. 서 론
 Ⅱ. 재료 및 방법
  1. 공시가축 및 실험설계
  2. 체중, 사료섭취량 및 번식성적 조사
  3. 일반성분 분석
  4. 통계분석
 Ⅲ. 결과 및 고찰
  1. 섭취량 및 증체량
  2. 에너지 급여수준에 따른 번식성적
  3. 에너지요구량 추정
 Ⅳ. 요 약
 Ⅴ. 사 사
 Ⅵ. REFERENCES

• 이진욱(국립축산과학원 가축유전자원센터) | Jinwook Lee (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
• 김관우(국립축산과학원 가축유전자원센터) | Kwan Woo Kim (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
• 이성수(국립축산과학원 가축유전자원센터) | Sung Soo Lee (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
• 고응규(국립축산과학원 가축유전자원센터) | Yeoung Gyu Ko (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
• 이용재(국립축산과학원 가축유전자원센터) | Yong Jae Lee (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
• 김성우(국립축산과학원 가축유전자원센터) | Sung Woo Kim (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
• 전다연(국립축산과학원 가축유전자원센터) | Da Yeon Jeon (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
• 노희종(국립축산과학원 가축유전자원센터) | Hee Jong Roh (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
• 윤영식(축산환경관리원) | Yeong Sik Yun (Institute of Livestock Environmental Management)
• 김도형(경북도립대학교 축산과) | Do Hyung Kim (Department of Animal Science, Gyeongbuk Provincial College) Corresponding author