The effect of fats and urea on in vitro cellulose digestion Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/ww72bf49j

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Objectives of this study were to ascertain the effect of fat and urea, used alone or in combination, on rumen cellulose digestion in vitro. A closed in vitro system (24 hour digestion) was used with a 5 x 4 factorial arrangement of treatments to study the effect of added corn oil (5 and 7%) and tallow (5 and 7%) to wood cellulose (Solka- Floc) with four levels of urea (0, .234, 2.34 and 4.68%) expressed as percent of substrate. The addition of urea at the 2.34 and 4.68% levels increased dry matter disappearance (DMD)(P <.01) and production of: acetic acid (P<.05), propionic acid (P<.01) and total volatile fatty acids (TVFA)(P<.01). Addition of either corn oil or tallow (5 or 7%) resulted in a depression in DMD (P<.01). Adding tallow (5 or 7%) resulted in lower production of acetic acid (P<.05) and of propionic acid (P<.01). Addition of urea plus fat (any treatment) led to improved DMD, increased propionic acid and TVFA production (P<.01), compared to fat, no urea treatments. Ammonia-nitrogen values were higher (P<.01) when 7% tallow and 4.68% urea were added together, and this combination resulted in the lowest gross energy from VFA's. Microbial protein synthesis (MPS) was increased (P<.05) with the addition of 4.68% urea, while the addition of fat (any treatment) depressed MPS production (P<.01). No significant differences in MPS were found between corn oil and tallow treatments.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2013-10-25T18:30:21Z (GMT). No. of bitstreams: 1 KezarWesleyW1977.pdf: 331995 bytes, checksum: 5308d6f429a4e34c340195ea6f86832c (MD5) Previous issue date: 1977-05-02
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-10-21T15:34:33Z (GMT) No. of bitstreams: 1 KezarWesleyW1977.pdf: 331995 bytes, checksum: 5308d6f429a4e34c340195ea6f86832c (MD5)
  • description.provenance : Approved for entry into archive by Kirsten Clark(kcscannerosu@gmail.com) on 2013-10-25T18:30:21Z (GMT) No. of bitstreams: 1 KezarWesleyW1977.pdf: 331995 bytes, checksum: 5308d6f429a4e34c340195ea6f86832c (MD5)
  • description.provenance : Submitted by Georgeann Booth (gbscannerosu@gmail.com) on 2013-10-17T21:20:33Z No. of bitstreams: 1 KezarWesleyW1977.pdf: 331995 bytes, checksum: 5308d6f429a4e34c340195ea6f86832c (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items