scholarly journals 321 Effect of injectable trace mineral on reproductive performance in beef heifers

2017 ◽  
Vol 95 (suppl_2) ◽  
pp. 156-156 ◽  
Author(s):  
S. A. Springman ◽  
J. G. Maddux ◽  
M. E. Drewnoski ◽  
R. N. Funston
Keyword(s):  
Reproductive Performance ◽  
Beef Heifers ◽  
Trace Mineral

374 Effects of Hydroxy Trace Mineral Supplementation on Gain and Reproductive Performance in Beef Heifers.

2018 ◽  
Vol 96 (suppl_2) ◽  
pp. 201-201
Author(s):  
S A Springman ◽  
T L Meyer ◽  
M E Drewnoski ◽  
R N Funston
Keyword(s):  
Reproductive Performance ◽  
Beef Heifers ◽  
Trace Mineral ◽  
Mineral Supplementation

scholarly journals Effects on Synchronization and Reproductive Efficiency of Delaying the Removal of the Intravaginal Progesterone Device by 24 h in the 5d Co-synch Protocol in Heifers

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 849
Author(s):  
Aitor Fernandez-Novo ◽  
Sergio Santos-Lopez ◽  
Jose Luis Pesantez-Pacheco ◽  
Natividad Pérez-Villalobos ◽  
Ana Heras-Molina ◽  
...  
Keyword(s):  
Animal Welfare ◽  
Reproductive Performance ◽  
Artificial Insemination ◽  
Fixed Time ◽  
Reproductive Efficiency ◽  
Beef Heifers ◽  
Animal Management ◽  
Commercial Farms ◽  
Beef Herds ◽  
Farm Economics

In beef herds, increasing animal welfare, improving reproductive performance and easing animal management are key goals in farm economics. We explored whether delaying the removal of the intravaginal progesterone device by 24 h in heifers synchronized with a 5d Co-synch 72-h protocol could improve reproductive efficiency of fixed-time artificial insemination (FTAI). In experiment 1, we examined the total synchronization rate (TSR) in cycling Holstein heifers. Heifers (13.4 ± 0.69 mo.) were randomly assigned to the standard 5d Co-synch 56-h protocol (5dCo56; n = 10), 5d Co-synch 72-h (5dCo72; n = 17), or the modified 5d Co-synch 72-h protocol, in which removal of the progesterone device was delayed by 24 h (6dCo48; n = 19). In experiment 2, 309 cycling beef heifers on 18 commercial farms were subjected to the 5d Co-synch 72-h or 6-d Co-synch 48-h protocol and conception rate (CR) studied. In experiment 1, the three protocols led no differences on TSRs of 80.0% (5dCo56), 88.2% (5dCo72), and 89.5% (6dCo48). In experiment 2, the CR from the beef heifers, observed during two consecutive reproductive seasons did not differ: 59.7% for 5dCo72 and 62.0% for 6dCo48 (p = 0.907). Therefore, delaying removal by 24 h provides satisfactory results without reducing reproductive efficiency of heifers.

scholarly journals Effect of Diet on Replacement Beef Heifer Growth and Reproductive Performance

2017 ◽  
Vol 5 (2) ◽  
pp. 26
Author(s):  
Janice G. P. Bowman ◽  
Bok F. Sowell
Keyword(s):  
Reproductive Performance ◽  
Average Daily Gain ◽  
Average Weight ◽  
Beef Heifers ◽  
Roller Mill ◽  
Feed Cost ◽  
Alfalfa Hay ◽  
Grass Hay ◽  
Beef Heifer ◽  
Daily Gain

One hundred-one crossbred beef heifers (average weight 256.1 kg) were used to evaluate the effects of diet during an 84-day period, on growth and reproductive performance. The four treatments were: 1) grass hay; 2) grass hay + 0.9 kg/day barley; 3) grass hay + 1.8 kg/day barley; and 4) alfalfa hay. Heifers were assigned randomly to 12 pens by weight (three pens/treatment). Prior to feeding, barley was cracked through a roller-mill. Heifers consuming alfalfa hay or grass hay + 1.8 kg barley gained 39% faster (0.68 and 0.74 kg/day, respectively; P = 0.01) than heifers consuming grass hay alone (0.51 kg/day). Heifers consuming grass hay + 0.9 kg barley were intermediate in average daily gain (ADG; 0.63 kg/day). Hay intake was 16% greater (P < 0.10) by heifers consuming alfalfa hay, grass hay, and grass hay + 0.9 kg barley compared with those consuming grass hay + 1.8 kg barley (average 8.1 vs 7.0 kg/day). Using costs (USD) of $0.066/kg, $0.099/kg, and $0.0935/kg for grass hay, alfalfa hay, and barley, respectively, feed cost/day was greatest (P < 0.01) for alfalfa hay ($0.81/day), intermediate for the grass hay + barley diets (average $0.63/day), and lowest for grass hay ($0.53/day). Cost/kg gain was less (P < 0.10) for grass hay + 1.8 kg barley compared with alfalfa hay. No diet differences (P > 0.70) were found in reproductive performance of the heifers. Feeding replacement heifers alfalfa hay resulted in performance equivalent to feeding grass hay + 1.8 kg barley, but the alfalfa hay diet had a higher cost.

Effect of nutritional management, trace mineral supplementation, and norgestomet implant on attainment of puberty in beef heifers.

1998 ◽  
Vol 76 (8) ◽  
pp. 2177 ◽  
Author(s):  
E E Grings ◽  
J B Hall ◽  
R A Bellows ◽  
R E Short ◽  
S E Bellows ◽  
...  
Keyword(s):  
Nutritional Management ◽  
Beef Heifers ◽  
Trace Mineral ◽  
Mineral Supplementation

Effect of treatment with ivermectin on reproductive performance of yearling beef heifers

1995 ◽  
Vol 44 (2) ◽  
pp. 189-197 ◽  
Author(s):  
R.L. Larson ◽  
L.R. Corah ◽  
M.F. Spire ◽  
R.C. Cochran
Keyword(s):  
Reproductive Performance ◽  
Beef Heifers ◽  
Effect Of Treatment

scholarly journals Impact of slick hair trait on physiological and reproductive performance in beef heifers consuming ergot alkaloids from endophyte-infected tall fescue1

2019 ◽  
Vol 97 (4) ◽  
pp. 1456-1467 ◽  
Author(s):  
Rebecca K Poole ◽  
Thomas L Devine ◽  
Kyle J Mayberry ◽  
Joan H Eisemann ◽  
Matt H Poore ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Ergot Alkaloids ◽  
Beef Heifers ◽  
Slick Hair
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