논문 상세보기
pp.83-91
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.
Ⅱ. 재료 및 방법
1. 농가 선정 및 분석기간
2. 분만 후 젖소의 생산성 및 경영현황 조사
3. 분석모형
Ⅲ. 결과 및 고찰
1. 착유우의 번식성적 분석
2. 착유우의 비유성적 분석
3. 착유우의 유성분
4. 착유우의 유대수입
5. 경영분석
Ⅳ. 요약
Ⅴ. 사사
Ⅵ. REFERENCES
