搜索结果: 1-4 共查到“食品科学技术 milk yield”相关记录4条 . 查询时间(0.093 秒)
Short Communication: Associations Between Blood Calcium Status at Calving and Milk Yield in Dairy Cows
blood plasma concentration hypocalcemia milk yield
2008/8/6
The purpose of the present study was to estimate the effect of total blood plasma calcium (TBPCC) concentration at calving on milk yield in dairy cows. Data originated from 153 dairy cows in 27 herds ...
The Association Between Previous 305-day Milk Yield and Disease in New York State Dairy Cows
disease milk yield dairy cows
2008/7/28
Logistic regression was used to examine the association between milk yield and disease. We studied 8070 cows of second or higher parity from 25 New York State Holstein herds, calving between June 1990...
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...
The Effects of Time of Disease Occurrence, Milk Yield, and Body Condition on Fertility of Dairy Cows
test-day milk yield conception mastitis body condition score
2008/7/14
The associations between occurrence of diseases, milk yield, and body condition score on conception risk after first artificial insemination (AI) were analyzed in an observational study on a convenien...