Effect of pattern of administration of bovine growth hormone on lactational performance of dairy cows

Journal of Dairy Science
S N McCutcheon, D E Bauman

Abstract

Bovine growth hormone was administered to Holstein cows (late lactation) in a 4 X 4 Latin square design. Treatments were 1) control, subcutaneous injection of placebo, 2) subcutaneous injection of 25 IU growth hormone every 2nd d, 3) daily subcutaneous injection of 25 IU growth hormone, 4) continuous subcutaneous infusion of 25 IU/d growth hormone. Daily profiles of growth hormone in plasma consisted of: 1) a relatively constant concentration averaging 4.5 ng/ml for control, 2) a single peak of 21 to 25 ng/ml followed by a steady decline to baseline for treatments involving daily or alternate day injection (in the latter case concentrations maintained at baseline during the 2nd d after injection), and 3) a relatively constant elevation to 10.6 ng/ml for the continuous subcutaneous infusion. Total growth hormone in plasma increased in proportion to average daily dose of exogenous growth hormone. Milk yield responses in the daily injected and infused groups did not differ and averaged 28% over controls. Gross efficiency (milk energy/consumed energy) was increased 16% by daily administration of 25 IU growth hormone. Responses to the alternate day injection were approximately half those predicted for an average dose of 12.5 IU/d. N...Continue Reading

References

May 1, 1985·Journal of Dairy Science·P J EppardS N McCutcheon
Sep 1, 1965·Journal of Dairy Science·H F Tyrrell, J T Reid
Aug 1, 1984·Journal of Animal Science·R J CollierM H Dehoff
Apr 1, 1981·Journal of Endocrinological Investigation·R C Gorewit

❮ Previous
Next ❯

Citations

Feb 1, 1987·Journal of Dairy Science·C J Peel, D E Bauman
Aug 1, 1991·Journal of Dairy Science·N J TessmannL D Satter
Aug 1, 1992·Journal of Dairy Science·E J DePeters, J P Cant
Oct 1, 1989·Journal of Dairy Science·W Chalupa, D T Galligan
Feb 10, 2018·International Journal of Food Science·Lamye Glory MohKuiate Jules-Roger
Jan 1, 1988·Journal of Receptor Research·J E Keys, J Djiane

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.