The DOI matches its Crossref record; 23 of the 23 references it cites were found in a registry or an index.
In situ rumen degradation kinetics of timothy and alfalfa as affected by cultivar and stage of maturity
Open accessAbstract
The objective of this study was to investigate the effects of cultivar and stage of maturity at cutting on rumen degradation characteristics of some feed components in alfalfa (Medicago sativa L.) and timothy (Phleum pratense L.). Two adapted cultivars of alfalfa (Pioneer and Beaver) and timothy (Climax and Joliette), grown in Saskatchewan (Canada), were cut at three stages: 1 = 1 wk before commercial cut (early bud for alfalfa; joint for timothy); 2 = at commercial cut (late bud for alfalfa; pre-bloom head for timothy); 3 = 1 wk after commercial cut (early bloom for alfalfa; full head for timothy). Rumen degradation characteristics, including rapidly degradable fraction (A), potentially degradable fraction (B), undegradable fraction (C), degradation rate (Kd), lag time (T0), and effective degradability (ED) of each component, were determined using in situ technique and analyzed by first order kinetic equation described by Ørskov and McDonald with lag time. The results showed that, in alfalfa, the cultivars have no effect on rumen degradation characteristics of dry matter (DM), organic matter (OM), crude protein (CP), and neutral detergent fiber (NDF) and acid detergent fiber (ADF). However, the stage of maturity at cutting has large effects on each component, except CP. Generally, with increasing stage of maturity, it decreased A or B and increased C without affecting Kd and T0, thus resulting in decreasing the ED fraction. In timothy, the cultivars have effects only on rumen degradation characteristics of CP. Climax has a higher effective degradability of CP (EDCP) than Joliette. The stage of maturity at cutting has a large impact on rumen degradation characteristics of each component. Increasing stage of maturity did not affect A, but reduced B and increased C without affecting Kd and T0, thus resulting in reducing ED fraction. In conclusion, Pioneer and Beaver alfalfa have similar rumen degradation characteristics for all feed components. Climax and Joliette timothy were different only on CP degradation pattern with Climax having a higher EDCP fraction than Joliette. The stage of maturity at cutting had a significant impact on rumen degradation characteristics for both forages. Generally, it decreased ED with increasing stage of maturity. Our results indicate that it is inappropriate to assume fixed degradation characteristics for a forage without considering factors such as stage of maturity at cutting. Key words: Chemical component, rumen degradation characteristics, forage, cultivar, maturity
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This was probably because CE destroyed the cell wall structure of the straw during fermentation, releasing nutrients and cellulose that promote the continuous growth of microorganisms, releasing more plant proteins and synthesizing new bacterial proteins that are more easily digested and absorbed by animals, which promotes digestibility and degradation.
“probably because CE destroied the cell wall structure of the straw during fermentation, releasing nutrients and cellulose that promote the continuous growth of microorganisms. In the process, release more plant proteins and continue to synthesize new bacterial proteins that are more easily digested and absorbed by animals, which promotes digestibility and degradation [32].”
From Cellulase Interacts with Lactic Acid Bacteria to Affect Fermentation Quality, Microbial Community, and Ruminal Degradability in Mixed Silage of Soybean Residue and Corn Stover (2021) · cites this paper as [32]
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Cites
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Zhao, C., Wang, L., Ma, G., Jiang, X., Yang, J., Lv, J., & Zhang, Y. (2021) · Animals · doi:10.3390/ani11020334 · Cited by 56
“In the process, release more plant proteins and continue to synthesize new bacterial proteins that are more easily digested and absorbed by animals, which promotes digestibility and degradation [32].”
Background
Metadata
- Authors
- Yu, P., Christensen, D. A., & McKinnon, J. J.
- Affiliations
- University of Saskatchewan (CA)
- ORCID
- Yu, P.
- Venue
- Canadian Journal of Animal Science
- Publisher
- Canadian Science Publishing
- Published
- 2004-06-01
- Volume
- 84
- Issue
- 2
- Pages
- 255-263
- ISSN
- 0008-3984 (ISSN-L)
- 1918-1825
- OpenAlex
- W1986169438
- Cited by
- 50
- References
- 23
- Citations by year
- 2025: 3 · 2024: 2 · 2023: 1 · 2022: 5 · 2021: 2 · 2020: 3 · 2019: 2 · 2018: 3 · 2017: 3 · 2016: 4 · 2014: 1 · 2013: 5 · 2012: 4
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Canadian Journal of Animal Science (publishedVersion)
- Funders
- University of Saskatchewan
- Ministry of Agriculture - Saskatchewan
- National Research Council Canada
- Topics
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Ruminant Nutrition and Digestive Physiology
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Pasture and Agricultural Systems
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
- Keywords
- alfalfa, timothy, timothy grass, cultivar effects, maturity stage, cuttings, crude protein degradability, fiber degradability, effective degradability, time delay, degradation kinetics, forage quality, in situ technique, dry matter, organic matter
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