Evaluation of protein fractionation systems used in formulating rations for dairy cattle.

Evaluation of protein fractionation systems used in formulating rations for dairy cattle. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Evaluation of protein fractionation systems used in formulating rations for dairy cattle. Abstract Text:

C Lanzas,L O Tedeschi,S Seo,D G Fox,

Production efficiency decreases when diets are not properly balanced for protein. Sensitivity analyses of the protein fractionation schemes used by the National Research Council Nutrient Requirement of Dairy Cattle (NRC) and the Cornell Net Carbohydrate and Protein System (CNCPS) were conducted to assess the influence of the uncertainty in feed inputs and the assumptions underlying the CNCPS scheme on metabolizable protein and amino acid predictions. Monte Carlo techniques were used. Two lactating dairy cow diets with low and high protein content were developed for the analysis. A feed database provided by a commercial laboratory and published sources were used to obtain the distributions and correlations of the input variables. Spreadsheet versions of the models were used. Both models behaved similarly when variation in protein fractionation was taken into account. The maximal impact of variation on metabolizable protein from rumen-undegradable protein (RUP) was 2.5 (CNCPS) and 3.0 (NRC) kg/d of allowable milk for the low protein diet, and 3.5 (CNCPS) and 3.9 (NRC) kg/d of allowable milk for the high protein diet. The RUP flows were sensitive to ruminal degradation rates of the B protein fraction in NRC and of the B2 protein fraction in the CNCPS for protein supplements, energy concentrates, and forages. Absorbed Met and Lys flows were also sensitive to intestinal digestibility of RUP, and the CNCPS model was sensitive to acid detergent insoluble crude protein and its assumption of complete unavailability. Neither the intestinal digestibility of the RUP nor the protein degradation rates are routinely measured. Approaches need to be developed to account for their variability. Research is needed to provide better methods for measuring pool sizes and ruminal digestion rates for protein fractionation systems.

Evaluation of protein fractionation systems used in formulating rations for dairy cattle. Publishing Authors By Initials

C Lanzas,LO Tedeschi,S Seo,DG Fox,

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

Evaluation of protein fractionation systems used in formulating rations for dairy cattle. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of dairy science

VOLUME: 90

Page Numbers: 507-21

Journal Abbreviation: J. Dairy Sci.

ISSN: 1525-3198

DAY: 21

MONTH: Jan

YEAR: 2007

Evaluation of protein fractionation systems used in formulating rations for dairy cattle. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 2985126

Evaluation of protein fractionation systems used in formulating rations for dairy cattle. Keywords Mesh Terms:

KEYWORDS:

MESH TERMS:

Chemical & Substance for Abstract: Evaluation of protein fractionation systems used in formulating rations for dairy cattle. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Evaluation of protein fractionation systems used in formulating rations for dairy cattle.

AFFILIATION: Department of Animal Science, Cornell University, Ithaca, NY 14853, USA. cl272@cornell.edu

Country: United States

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: J Dairy Sci

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Evaluation of protein fractionation systems used in formulating rations for dairy cattle Related Publications

• Absolute linearity measurements on HgCdTe detectors in the infrared region.
• Cognitive functioning in excessive drinkers: evidence for dissociable impairments.
• Comparison of the mutagenic potential of 17 physical and chemical agents analyzed by the flow cytometry mutation assay.
• Computational Neuronal Oscillations using Morlet Wavelet Transform.
• Diastereoselective synthesis of methylenecyclopropanes from chiral cyclopropene derivatives.
• Enantioselective, facially selective carbomagnesation of cyclopropenes.
• Enterohepatic Helicobacter species isolated from the ileum, liver and colon of a baboon with pancreatic islet amyloidosis.
• Evaluation of protein fractionation systems used in formulating rations for dairy cattle.
• Hypoxia-inducible factor-1alpha expression predicts a poor response to primary chemoendocrine therapy and disease-free survival in primary human breast cancer.
• Identification of Rv3230c as the NADPH oxidoreductase of a two-protein DesA3 acyl-CoA desaturase in Mycobacterium tuberculosis H37Rv.
• Interleukin-17 as a molecular target in immune-mediated arthritis: immunoregulatory properties of genetically modified murine dendritic cells that secrete interleukin-4.
• Issues in estimating the prevalence of fetal alcohol syndrome: examination of 2 counties in New York State.
• MR imaging volumetry of subcortical structures and cerebellar hemispheres in temporal lobe epilepsy.
• Outcomes from a group intervention for coping with HIV/AIDS and childhood sexual abuse: reductions in traumatic stress.
• Prolonged survival of porcine hepatocytes in cynomolgus monkeys.
• Rapid discrimination of Bacillus anthracis from other members of the B. cereus group by mass and sequence of "intact" small acid soluble proteins (SASPs) using mass spectrometry.
• Rapid onset of ulcerative typhlocolitis in B6.129P2-IL10tm1Cgn (IL-10-/-) mice infected with Helicobacter trogontum is associated with decreased colonization by altered Schaedler's flora.
• Regulatory T cell defects in rheumatoid arthritis.
• Relationship between white matter fractional anisotropy and other indices of cerebral health in normal aging: tract-based spatial statistics study of aging.
• Retrospective motion correction protocol for high-resolution anatomical MRI.
• Rh-catalyzed intermolecular reactions of alkynes with alpha-diazoesters that possess beta-hydrogens: ligand-based control over divergent pathways.
• Simian immunodeficiency virus-induced CD4+ T cell deficits in cytokine secretion profile are dependent on monkey origin.
• Synthesis of cyclopropene alpha-amino acids via enantioselective desymmetrization.
• The role of infant soothability in the relation between infant negativity and maternal sensitivity.
• The sociobiologic integrative model (SBIM): enhancing the integration of sociobehavioral, environmental, and biomolecular knowledge in urban health and disparities research.
• The type 2 deiodinase (DIO2) A/G polymorphism is not associated with glycemic traits: the Framingham Heart Study.
• Translation initiation in Saccharomyces cerevisiae mitochondria: functional interactions among mitochondrial ribosomal protein Rsm28p, initiation factor 2, methionyl-tRNA-formyltransferase and novel protein Rmd9p.
• Translational control of ceruloplasmin gene expression: beyond the IRE.
• Using the Price Equation to partition the effects of biodiversity loss on ecosystem function.
• Variation in caregiver perceptions of teamwork climate in labor and delivery units.