scholarly journals Responses of Holstein Cows to Different Bovine Somatotropin (bST) Treatments during the Transition Period and Early Lactation

2004 ◽  
Vol 17 (6) ◽  
pp. 784-793 ◽  
Author(s):  
M. S. Gulay ◽  
A. N. Garcia ◽  
M. J. Hayen ◽  
C. J. Wilcox ◽  
H. H. Head
Keyword(s):  
Transition Period ◽  
Bovine Somatotropin ◽  
Holstein Cows ◽  
Early Lactation

scholarly journals Fatty acid composition of milk from multiparous Holstein cows treated with bovine somatotropin and fed n-3 fatty acids in early lactation

2009 ◽  
Vol 92 (10) ◽  
pp. 4865-4875 ◽  
Author(s):  
M. Carriquiry ◽  
W.J. Weber ◽  
C.R. Dahlen ◽  
G.C. Lamb ◽  
L.H. Baumgard ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Bovine Somatotropin ◽  
Holstein Cows ◽  
Early Lactation

Effect of feeding diet containing fish oil and canola oil from transition period on milk production and components of Holstein cows in early lactation

2009 ◽  
Vol 2009 ◽  
pp. 157-157
Author(s):  
T Vafa ◽  
A Naserian ◽  
A Heravi Moussavi ◽  
R Valizadeh ◽  
M Danesh Mesgaran
Keyword(s):  
Fatty Acids ◽  
Fish Oil ◽  
Dairy Cows ◽  
Milk Production ◽  
Canola Oil ◽  
Unsaturated Fatty Acids ◽  
Transition Period ◽  
Holstein Cows ◽  
Early Lactation ◽  
Effect Of Feeding

There are too many physiological and nutritional factors which can influence lactation performance of early lactation Holstein dairy cows. Supplemental fat sources are utilized in rations for dairy cows as a common method to increase the energy density of the diet, especially in early lactation (Juchem et al., 2007). The fat sources also have a positive effect on milk fatty acid profile. Canola seed which contains 40% fat is an excellent source of dietary fat high in unsaturated fatty acids and protein for dairy animals. Canola oil contains 51% oleic, 25% linoleic, and 14% linolenic acids. Fish oil contains relatively high concentrations fatty acids of the n-3 family. It seems that feeding a blend of different oils will have more positive productive response than individual usage of them. The aim of this study was to evaluate the effect of feeding diets containing fish oil and canola oil starting from transition period on milk production and composition of early lactating Holstein cows.

scholarly journals Postpartum ovarian activity in multiparous Holstein cows treated with bovine somatotropin and fed n-3 fatty acids in early lactation

2009 ◽  
Vol 92 (10) ◽  
pp. 4876-4888 ◽  
Author(s):  
M. Carriquiry ◽  
C.R. Dahlen ◽  
W.J. Weber ◽  
G.C. Lamb ◽  
B.A. Crooker
Keyword(s):  
Fatty Acids ◽  
Bovine Somatotropin ◽  
Holstein Cows ◽  
Ovarian Activity ◽  
Early Lactation

scholarly journals Surrogate Indexes of Insulin Resistance in Dairy Goats: Transitional Variation in Subclinical Hyperketonemia

2021 ◽  
Vol 8 (6) ◽  
pp. 102
Author(s):  
Siqi Liu ◽  
Yezi Kong ◽  
Jing Wen ◽  
Yan Huang ◽  
Yaoquan Liu ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Transition Period ◽  
Jugular Vein ◽  
Metabolic Parameters ◽  
Model Assessment ◽  
Early Lactation ◽  
Homeostasis Model Assessment ◽  
Dairy Goats ◽  
Blood Samples ◽  
Normal Glucose

Background: Dairy goats are highly susceptible to subclinical hyperketonemia (SCHK) during the transition period. This study aimed to compare the variation in metabolic parameters and surrogate indexes of insulin resistance (sIR) between goats with SCHK and clinically healthy (HEAL) goats during the transition period. Methods: Twenty Guanzhong dairy goats were assorted to HEAL (n = 10) and SCHK (n = 10) groups according to the blood β-hydroxybutyrate (BHBA) concentrations. The blood samples were taken from the jugular vein of each goat at −3, −2, −1, 0 (partum), +1, +2, and +3 weeks relative to kidding to analyses GLU and INS. The sIR was calculated from blood metabolic parameters. Results: Compared with the HEAL goats, the insulin concentrations were significantly higher in SCHK goats during the first three weeks postpartum. The QUICKI, revised QUICKI (RQUICKI), and RQUICKIBHBA were significantly lower in goats with SCHK at 1 week postpartum, while the homeostasis model assessment-IR (HOMA-IR) was significantly higher. Conclusion: Goats with SCHK made more efforts through elevated insulin levels at early lactation than HEAL goats, thereby maintaining the normal glucose concentrations.

scholarly journals Effect of growth hormone on milk yield and reproductive performance of subfertile Holstein cows during extended lactations

2019 ◽  
Vol 17 (1) ◽  
pp. e0403 ◽  
Author(s):  
Jessica Flores ◽  
José E. García ◽  
Jesús Mellado ◽  
Leticia Gaytán ◽  
Ángeles De Santiago ◽  
...  
Keyword(s):  
Milk Yield ◽  
Reproductive Performance ◽  
Bovine Somatotropin ◽  
Holstein Cows ◽  
Control Group ◽  
Recombinant Bovine Somatotropin ◽  
Northern Mexico ◽  
Lactation Length ◽  
Hot Environment ◽  
Farm Efficiency

The objective of this study was to determine the effects of the administration of recombinant bovine somatotropin (rbST) throughout lactation to high-yielding subfertile (conception > 270 days postpartum) Holstein cows undergoing extended lactations (≥480 d) on milk production and reproductive performance. The study used two large adjacent commercial herds with similar management in a hot area of northern Mexico (25° N). Cows in one herd (n=2341) received a 500-mg dose of rbST every 14 d until dried off, starting 60 days postpartum. The other herd served as control (n=984). Across parity, rbST-treated cows produced 20% greater milk yield than control cows in 305-d lactations. Across parities, milk yield from 305 d postpartum to the end of lactation was 2734 kg higher in rbST-treated cows than control cows. Across parities rbST-treated cows produced 4777 more kg of milk during the entire lactation (mean 605 d) than the control group (mean 572 d). Conception rates (CR) at first service were only 3.2% and 5.9% (p<0.05) for control and rbST-treated cows, respectively. Overall CR was 43.5% and 61.6% (p<0.05) for control and treated cows, respectively. Control cows required 2.4 more (p<0.01) services per conception than rbST-treated cows. It was concluded that in this hot environment, the use of rbST suits dairy producers because it substantially improves both milk yield and reproductive performance in subfertile high-yielding Holstein cows. By markedly increasing lactation length and lactation persistency farm efficiency is greatly improved due to extended herd life.

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