scholarly journals Evaluation of criteria for optimal time AI postulated by estrous signs in lactating dairy cows kept in tie-stalls

2017 ◽  
Vol 63 (6) ◽  
pp. 597-604 ◽  
Author(s):  
Toshiaki SUMIYOSHI ◽  
Natsumi ENDO ◽  
Tomomi TANAKA ◽  
Hideo KAMOMAE
Keyword(s):  
Dairy Cows ◽  
Optimal Time ◽  
Lactating Dairy Cows

scholarly journals 8RESYNCHRONIZATION OF OVULATION AND TIMED INSEMINATION IN LACTATING DAIRY COWS USING THE OVSYNCH AND HEATSYNCH PROTOCOLS INITIATED 7 DAYS BEFORE PREGNANCY DIAGNOSIS ON DAY 30 BY ULTRASONOGRAPHY

2004 ◽  
Vol 16 (2) ◽  
pp. 126 ◽  
Author(s):  
J.A. Bartolome ◽  
A. Sozzi ◽  
J. McHale ◽  
K. Swift ◽  
D. Kelbert ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Pregnancy Rate ◽  
Dairy Herd ◽  
Optimal Time ◽  
Reproductive Efficiency ◽  
Cooling Systems ◽  
North Central ◽  
Central Florida ◽  
Pregnancy Diagnosis ◽  
Lactating Dairy Cows

Rapid re-synchronization of ovulation and insemination in cows found nonpregnant to a previous service is important to maintain high reproductive efficiency. The objective was to compare pregnancy rate (PR) and pregnancy losses (PL) in cows subjected to Ovsynch or Heatsynch protocols 7 days before pregnancy diagnosis by ultrasonography (U/S) on Day 30. Initiation of both protocols included administration of GnRH on Day 23, which was considered the optimal time according to the distribution of interestrus intervals in cows previously inseminated. The study was conducted in a large dairy herd located in north central Florida from March to May, 2003. Of 593 cows treated with GnRH on Day 23 (±1) after insemination and found nonpregnant at U/S on Day 30 (±1; experimental Day 0), 75% (445) had a CL (diestrus) and were sequentially assigned to the two experimental groups. Cows in the Ovsynch Group (n=225) received 25mg (i.m.) PGF2α (Lutalyse, Pharmacia, Kalamazoo, MI, USA) on Day 0, 100μg (i.m.) GnRH (Cystorelin, Merial Limited, Iselin, NJ, USA) on Day 2, and were timed inseminated 16h later. Cows in Heatsynch Group (n=220) received 25mg (i.m.) PGF2α on Day 0, and 1mg (i.m.) estradiol cypionate (ECP, Pharmacia, Kalamazoo, MI, USA) on Day 1, and were timed-inseminated 36h later. Pregnancy at Day 30 was determined by U/S and at Day 55 by rectal examination of the genital tract. Pregnancy rate and PL were evaluated using multiple logistic regression. Pregnancy rate at Day 30 for Ovsynch (64/225, 28.4%) and Heatsynch (63/220, 28.6%) and PR at Day 55 for Ovsynch (58/225, 25.8%) and Heatsynch (54/220, 24.5%) were not different. In addition, PL between Days 30 and 55 for Ovsynch (6/64, 9.4%) and Heatsynch (9/63, 14.3%) were not different. There were no effects of parity, inseminator and days in milk on PR. However, PR at day 30 was higher in lots with cooling systems (46/141, 32.6%) and lots of first calf heifers (41/135, 30.4%) compared to lots of multiparous cows late in lactation without cooling systems (32/148, 21.6%). In conclusion, Heatsynch and Ovsynch initiated 7 days before pregnancy diagnosis on Day 30 had comparable PR of 25% at Day 55 in lactating dairy cows during the period of March–May.

0620 Performance and rumimal metabolism are not changed in lactating dairy cows offered spring available annual forage crops during a short-term grazing experiment

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 294-295
Author(s):  
K. A. Juntwait ◽  
A. F. Brito ◽  
K. S. O'Connor ◽  
R. G. Smith ◽  
K. M. Aragona ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Short Term ◽  
Forage Crops ◽  
Grazing Experiment ◽  
Lactating Dairy Cows

Wood Molasses as a Feed Ingredient for Lactating Dairy Cows

1954 ◽  
Vol 13 (1) ◽  
pp. 44-48
Author(s):  
R. K. Waugh ◽  
J. L. Moore ◽  
H. L. Lucas ◽  
E. W. Faires
Keyword(s):  
Dairy Cows ◽  
Feed Ingredient ◽  
Lactating Dairy Cows

Effect of Herbal Galactogogue (Sanjivani biokseera) on Milk Yield and Milk Constituents in Lactating Kankrej Cattle at Organised Farm

2019 ◽  
Vol 15 (02) ◽  
pp. 39-41
Author(s):  
H H Panchasara ◽  
A B Chaudhari ◽  
D A Patel ◽  
Y M Gami ◽  
M P Patel
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Milk Yield ◽  
Milk Composition ◽  
Nutritional Requirements ◽  
Not Given ◽  
Distinct Effect ◽  
Lactating Dairy Cows ◽  
Group I ◽  
Effect Of Feeding

The study was conducted to evaluate the effect of feeding herbal galactogogue preparation (Sanjivani biokseera) on the milk yield and milk constituents in lactating Kankrej cows. Thirty-two lactating Kankrej cows in their 1st to 6th lactation were taken for the experiment from 3 days after calving up to 52 days postpartum. All the animals were fed as per the standard seasonally available roughages and concentrates to meet their nutritional requirements. The cows were randomly divided into two uniform groups of 16 cows in each according to initial milk yield and milk composition. The animals in group-I were not given any supplement and served as control. The animals in group-II were given Sanjivani biokseera (Naturewell Industries) @ 60 g per day for 1-month, commencing 3 days after calving, in addition to the usual feeds/fodders. A clear difference was observed in milk yield from day 8 onward of experiment between groups with significant (plessthan0 0.05) higher values from day 16-52 in cows fed herbal galactogogue as compared to control, but no such distinct effect on milk constituents was observed on day 52 when analyzed. The use of herbal galactogogue significantly (p lessthan 0.05) increased the overall average of 52 days milk production, which was 9.34 ± 0.21 lit/day in supplemented as compared to 7.75 ± 0.26 lit/day in control animals. It was concluded that herbal galactogogue (Sanjivani biokseera) could increase milk yield in lactating dairy cows through its galactopoetic property and improved rumen environment.

Early postabortion recovery of Neospora-infected lactating dairy cows

2009 ◽  
Vol 72 (6) ◽  
pp. 798-802 ◽  
Author(s):  
P. Santolaria ◽  
F. López-Gatius ◽  
J. Yániz ◽  
I. García-Ispierto ◽  
C. Nogareda ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Lactating Dairy Cows
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