搜索结果: 1-1 共查到“食品科学技术 days open”相关记录1条 . 查询时间(0.062 秒)
The Association Between Cumulative Milk Yield, Days Open, and Days to First Breeding in New York Holstein Cows
days open survival analysis milk yield
2008/7/25
The associations among milk yield, days open, and days to first breeding were studied in 15,320 Holstein cows, calving between June 1990 and November 1993, in 26 New York herds. Survival analysis, inc...