Modeling the lowest-cost splitting of a herd of cows by optimizing a ...
The TD milk yields for cows are affected by factors such as breed, region of the country, herd management and management group within a herd. (Everett et al., ...
COMBINING TEST DAY AND FULL LACTATION RECORDS IN ...The sample included. 89,877 TD records for 11,844 cows in production. The mean production per cow per TD was 24.18 kg for milk. (SD = 6.25 kg), 885 g for fat ... Breeding and Genetics Genetic Prediction and Selection in CattleHowever, cattle in the TD group sometimes had a small amount of crusty serous discharge at the vaccination site on ? 1 day of observation. Also, sites of TD ad-. USE OF TEST-DAY MILK YIELD FOR GENETIC EVALUATION IN ...ABSTRACT. In test-day (TD) models, records from individual test days are used to determine lactation production in- stead of aggregating records. ????? ???? ??????? ?????? - ??... ????????????????????????. ????????? ???? ... (??????). ? 37 ? ?????????????????????? ... ????(??)???????(???)?? - ?????? ??????????1??? ????? ??? ???? ?? ??15?? ???????. ??????????? (1) ??? ????? ???????????? ???? ... ???2 ?????????????? - ?????????1 ????????????????????. ?????????????????. (1) ??4?5?6????????????????????D?? ... ??13?17 ?????????? - ?????????1???????????????????????????????????????????. ?????????????????????? ?2?????????? ... ????????????26? - ???????????????? ??. ?????. ?. ?. ??1?1. ?????????. ??1?2. ?????????????. ??1?3. ??????????42????????. ????????? ??? ??????????????????????????. ? ???????????????????????????. ?????. ? ?????????????? ... ???????????????????????1? ????????. ????????????????????????????????????????. ??????????????????? ... ??????? ??????????? ?323???? ?? ?Td=21kN/m????????????????. m2. 5,000. ?. ?? ... ?????????????????????????????????? ... ??????? - ????? - ??? ???????5??????????. (1)???????. ? ???????????????????????? ? ??????????????????????
Autres Cours:
