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논문 기본 정보

자료유형
학술저널
저자정보
김태일 (농촌진흥청 국립축산과학원) Vijayakumar Mayakrishnan (농촌진흥청 축산기술연구소) 배광수 (농촌진흥청 축산기술연구소) 정하연 (농촌진흥청 축산연구소) 박범영 (농촌진흥청축산기술연구소) 임동현 (농촌진흥청 축산기술연구소(천안))
저널정보
경상대학교 농업생명과학연구원(구 경상대학교 시설원예연구소) 농업생명과학연구 농업생명과학연구 제51권 제6호
발행연도
2017.12
수록면
137 - 144 (8page)
DOI
https://doi.org/10.14397/jals.2017.51.6.137

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A diverse of recommendation has been made for the structure and management of dairy cows,despite demanding research, the relationship between lactation number and various factors is yetto be established. The present study was aimed to investigate the covariance among lactationnumber, growth performance, calving interval, and milk production was considered to increase anefficiency of selection schemes and to manage more efficiently Holstein dairy cows that havebeen raised on small-scale family farms in Republic of Korea. For that purpose, the data wereobserved from 850 Holstein dairy cows, which a total of 3929 milking, since April 2016 -January 2017. We measured the body weight, height, age, calving interval, and milk productionof the each dairy cow. Also, information about the date of lactation, calving interval, and milkproduction was recorded using an automatic milking system(AMS) with identification numbers. Milk production was calculated per udder quarter in the AMS. Our study results showed theincreased average body weight(p>0.05) in 1, 2, 3, and 4th lactating dairy cows and afterwards,we noticed the tendency on the average body weight(p<0.05) per lactation progressed. There wasno significant difference noticed on height measurement of dairy cows. From the processing dataof 850 Holstein dairy cows, the lactation number 1 and 7 had a greater calving interval withsignificantly lowered milk production, and the lactation number 2, 3, 4, 5, and 6 hadsignificantly lowered the calving interval(p<0.05) with a greater milk production. From our studyresults, we evidenced that there is a significant relationship between the lactation number, growthperformance, calving interval, and milk yield, and the maximum production of milk occurring inthe 3rd and 4th lactation dairy cows. The achieved results from this study can be used by thesmall-scale farmers to encourage the structure and management of growth performance, calvinginterval, and milk yield in Holstein dairy cows in Korea.

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