Autumn fertility of dairy cows is lower than in winter, although ambient temperatures
drop and cows are no longer exposed to thermal stress. For example, in Florida, the
autumn conception rate October–November. of Holstein cattle was found to be around
35–40%, compared with above 50% in winter January–March; Badinga et al., 1985..
Conception rates of high-yielding dairy cows in Israel Herd Book data, 1992–1997.
drop from 45% in winter to around 20% during the summer, and to 23% and 29% in
October and November, respectively. These figures clearly show a delayed influence of
summer HS on autumn fertility.
Autumn fertility of dairy cows is lower than in winter, although ambient temperaturesdrop and cows are no longer exposed to thermal stress. For example, in Florida, theautumn conception rate October–November. of Holstein cattle was found to be around35–40%, compared with above 50% in winter January–March; Badinga et al., 1985..Conception rates of high-yielding dairy cows in Israel Herd Book data, 1992–1997.drop from 45% in winter to around 20% during the summer, and to 23% and 29% inOctober and November, respectively. These figures clearly show a delayed influence ofsummer HS on autumn fertility.
การแปล กรุณารอสักครู่..