POSTPARTUM INTERVAL IN 10 FIRST-CROSSES OF BEEF COWS UNDER DRYLOT AND RANGE CONDITIONS
نویسندگان
چکیده
منابع مشابه
Increasing Glucogenic Precursors in Range Supplements Fed T O Young Postpartum Beef Cows Shortens Postpartum Interval
Cattle grazing winter range forage often exhibit yearly variation in response to supplementation. This variation may be predisposed by circulating concentration and subsequent metabolism of glucose, whieh is influenced by the quality and availability of dormant range forage. Therefore, a study conducted at the Corona Range and Livestock Research Center during two dry years, 2000 (driest) and 20...
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Cows in negative energy balance after calving often have reduced reproductive performance, which is mediated by metabolic signals. The objective of these studies was to determine the association of serum metabolites, days to first postpartum ovulation, milk production, cow BW change, BCS, and calf performance with conception date in spring-calving 2- and 3-yr-old beef cows grazing native range....
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Three experiments were conducted to evaluate the effects of biostimulation (exposure to bulls or androgenized females) on various reproductive variables in suckled beef cows. Bulls or testosterone-treated cows (TTC) were introduced to cows, randomly allotted to one of four groups, within 72 h postpartum. In Exp. 1, Groups 1 and 3 were exposed to bulls and Groups 2 and 4 were exposed to TTC. In ...
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The effect of implants of estradiol on initiation of ovarian cycles postpartum was studied in 201 anestrous beef cows. Cows from four farms were used over a 2-yr period in a 2 x 3 factorial arrangement of treatments with estradiol implants and stage postpartum as main effects. Cows were assigned at random within date of calving within farm to receive an ear implant containing estradiol-17 beta ...
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ژورنال
عنوان ژورنال: Canadian Journal of Animal Science
سال: 1988
ISSN: 0008-3984,1918-1825
DOI: 10.4141/cjas88-117