Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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The Effect of Rice Straw and Tall Fescue Hay for Holstein Heifers on the Productivity and Economics of Lactating Cow

홀스타인 육성기에 볏짚 및 톨페스큐 건초 급여가 착유우의 생산성 및 경제성에 미치는 영향

  • Jin Su Ryu (Division of Applied Life Science, Gyeongsang National University) ;
  • Shin Ja Lee (University-Centered Labs, Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Hyun Jin Kim (Department of Africultural biotechnoloty College of Agricuture and Life Sciences, Seoul National University) ;
  • Sung Sill Lee (University-Centered Labs, Institute of Agriculture and Life Science, Gyeongsang National University)
  • 유진수 (경상국립대학교 응용생명과학부) ;
  • 이신자 (경상국립대학교 농업생명과학연구원(중점연구소)) ;
  • 김현진 (서울대학교 농업생명과학대학 농업생명과학부) ;
  • 이성실 (경상국립대학교 농업생명과학연구원(중점연구소))
  • Received : 2024.05.29
  • Accepted : 2024.06.27
  • Published : 2024.06.30
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Abstract

We compared the reproductive performance, non-productive performance, and milk composition performance of two groups of lactating cows that were either rice straw or tall fescue. We also compared and analyzed these parameters after the first parturition during the breeding period. The calving interval, artificial insemination, and duration from calving to conception were longer in the rice straw group than in the tall fescue group. The 305-day and peak milk yields were significantly higher in the tall fescue group than in the rice straw group (p<0.01). Milk fat content was significantly higher in the tall fescue group than in the rice straw group (p<0.001), but milk protein content was the same between the feeding groups. The difference in raw milk sales income between rice straw and tall fescue groups tended to increase as the number of lactations increased, but there was no effect of reduced feed costs. Analysis of the milk production and raw milk sales income of the surveyed farms revealed that the average milk production per head was significantly (p<0.05) higher in the tall fescue group than in the rice straw group, and raw milk sales income showed a similar tendency. Overall, these results provide important details to be considered when selecting feed as a way to reduce milk production and heifer raising costs. However, there remains a need for future follow-up studies exploring the relationship between feed choice and the management of heifers.

육성기간 중 볏짚 및 톨페스큐 급여가 착유우의 번식, 비유, 유성분 및 경영에 미치는 영향을 비교했다. 분만간격, 수정횟수 및 공태일수는 볏짚급여군에서 더 길게 나타났으며, 305일 유량 및 비유 peak 유량은 톨페스큐급여군에서 유의적으로 높았다(p<0.01). 유지방 함량은 톨페스큐급여군에서 유의적으로 높았으나(p<0.001), 유단백질 함량은 유의차가 없었다. 볏짚급여군과 톨페스큐급여군의 유대수입 차이는 산차가 증가할수록 증가하였으며, 육성기간 볏짚 급여에 따른 사료비 절감 효과는 없었다. 조사 농가의 우유생산량 및 유대수입은 톨페스큐급여군에서 유의적으로 높았다(p<0.05). 결과적으로 사료비 절감을 위한 육성우 기간에 볏짚 급여는 단기적으로 육성우 사료비 절감 효과를 볼 수 있지만, 착유우 생산성적 및 경영성적 저하를 감안하면 장기적으로 목장 운영에 손해를 볼 수 있으므로, 육성우 사양관리의 중요성과 인식 전환이 필요할 것으로 생각된다. 또한, 육성기 이용 조사료는 가격이 비싼 톨페스큐보다 국내산 조사료를 이용하여 동일한 효과를 볼 수 있도록 육성우용 국내산 조사료의 생산 및 이용에 관한 연구가 진행되어야 할 것이다.

Keywords

Acknowledgement

본 논문은 한국연구재단(NRF) NRF-2015R1A6A1A03031413의 지원을 받아 진행되었습니다.

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