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Forage Quality Applied Research: Evaluation of Meadow Fescue Cultivars in Alfalfa; Assessment of Hand-Held Near-Infrared Spectrometer for Dry Matter Composition in Alfalfa-Grass Fields, and Diet Influence on Fecal Metabolic Fraction in Sheep- [electronic resource]
Forage Quality Applied Research: Evaluation of Meadow Fescue Cultivars in Alfalfa; Assessment of Hand-Held Near-Infrared Spectrometer for Dry Matter Composition in Alfalfa-Grass Fields, and Diet Influence on Fecal Metabolic Fraction in Sheep- [electronic resource]
상세정보
- 자료유형
- 학위논문
- Control Number
- 0016934604
- International Standard Book Number
- 9798380315364
- Dewey Decimal Classification Number
- 636
- Main Entry-Personal Name
- Tacoma-Fogal, Rinske.
- Publication, Distribution, etc. (Imprint
- [S.l.] : Cornell University., 2023
- Publication, Distribution, etc. (Imprint
- Ann Arbor : ProQuest Dissertations & Theses, 2023
- Physical Description
- 1 online resource(103 p.)
- General Note
- Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
- General Note
- Advisor: Cherney, Debbie.
- Dissertation Note
- Thesis (Ph.D.)--Cornell University, 2023.
- Restrictions on Access Note
- This item must not be sold to any third party vendors.
- Summary, Etc.
- 요약Forage quality plays a critical role in the overall health, productivity, and performance of ruminants driving production efficiency, improving profitability, and sustainability. Tools to measure forage quality are numerous and ones that will be discussed in this dissertation include evaluating different meadow fescue (Festuca pratensis Huds.) cultivars, handheld near-infrared spectrometry, and apparent digestibility as influenced by fecal mass. We evaluated the effect of meadow fescue (MF) grass cultivars interceded with alfalfa on grass proportion and nutritive value on commercial dairy farms in New York State. To achieve high-quality alfalfa-grass forage, a seeding rate of 1.1 kg hectare-1 for most of the MF cultivars resulted in optimal grass proportion of 20-30%. The tetraploid MF cultivars had lower neutral detergent fiber (NDF) and higher invitro true digestibility (IVTD) compared to other cultivars. Additional tools to improve forage quality involved the use of hand-held near-infrared spectrometry technology. Optimal grass proportions in alfalfa-grass mixtures range between 20 to 30%, creating an opportunity for calibration development to enable hand-held NIR spectrometers to estimate grass proportion in fresh alfalfa-grass mixtures. Model predictive capability for estimating grass content in alfalfa-grass mixtures yielded an R2 of 0.83 and a ratio of performance to deviation (RPD) of 2.6 when a sliding scanning technique versus a stationary technique was used. In addition, a modified fractionation method used to quantify bacterial mass in human fecal matter was evaluated as a method to determine bacterial mass in ruminant feces. The procedure was designed to separate the undigested feed fraction from the bacterial fraction, however, microscopic assessment revealed fibrous feed residue contamination in the bacterial pellet from sheep fecal samples. Alternative methods were performed to estimate the microbial mass in sheep feces. True digestibility was examined from sheep on either high corn grain or high soy hull diets. Results suggested differences in diet NDF level affects fecal microbial mass.
- Subject Added Entry-Topical Term
- Animal sciences.
- Subject Added Entry-Topical Term
- Agronomy.
- Subject Added Entry-Topical Term
- Agriculture.
- Index Term-Uncontrolled
- Digestibility
- Index Term-Uncontrolled
- Fecal composition
- Index Term-Uncontrolled
- Forage composition
- Index Term-Uncontrolled
- Forage quality
- Index Term-Uncontrolled
- Method development
- Added Entry-Corporate Name
- Cornell University Animal Science
- Host Item Entry
- Dissertations Abstracts International. 85-03B.
- Host Item Entry
- Dissertation Abstract International
- Electronic Location and Access
- 로그인을 한후 보실 수 있는 자료입니다.
- Control Number
- joongbu:642548
MARC
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■020 ▼a9798380315364
■035 ▼a(MiAaPQ)AAI30631256
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a636
■1001 ▼aTacoma-Fogal, Rinske.▼0(orcid)0000-0001-9599-3321
■24510▼aForage Quality Applied Research: Evaluation of Meadow Fescue Cultivars in Alfalfa; Assessment of Hand-Held Near-Infrared Spectrometer for Dry Matter Composition in Alfalfa-Grass Fields, and Diet Influence on Fecal Metabolic Fraction in Sheep▼h[electronic resource]
■260 ▼a[S.l.]▼bCornell University. ▼c2023
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2023
■300 ▼a1 online resource(103 p.)
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-03, Section: B.
■500 ▼aAdvisor: Cherney, Debbie.
■5021 ▼aThesis (Ph.D.)--Cornell University, 2023.
■506 ▼aThis item must not be sold to any third party vendors.
■520 ▼aForage quality plays a critical role in the overall health, productivity, and performance of ruminants driving production efficiency, improving profitability, and sustainability. Tools to measure forage quality are numerous and ones that will be discussed in this dissertation include evaluating different meadow fescue (Festuca pratensis Huds.) cultivars, handheld near-infrared spectrometry, and apparent digestibility as influenced by fecal mass. We evaluated the effect of meadow fescue (MF) grass cultivars interceded with alfalfa on grass proportion and nutritive value on commercial dairy farms in New York State. To achieve high-quality alfalfa-grass forage, a seeding rate of 1.1 kg hectare-1 for most of the MF cultivars resulted in optimal grass proportion of 20-30%. The tetraploid MF cultivars had lower neutral detergent fiber (NDF) and higher invitro true digestibility (IVTD) compared to other cultivars. Additional tools to improve forage quality involved the use of hand-held near-infrared spectrometry technology. Optimal grass proportions in alfalfa-grass mixtures range between 20 to 30%, creating an opportunity for calibration development to enable hand-held NIR spectrometers to estimate grass proportion in fresh alfalfa-grass mixtures. Model predictive capability for estimating grass content in alfalfa-grass mixtures yielded an R2 of 0.83 and a ratio of performance to deviation (RPD) of 2.6 when a sliding scanning technique versus a stationary technique was used. In addition, a modified fractionation method used to quantify bacterial mass in human fecal matter was evaluated as a method to determine bacterial mass in ruminant feces. The procedure was designed to separate the undigested feed fraction from the bacterial fraction, however, microscopic assessment revealed fibrous feed residue contamination in the bacterial pellet from sheep fecal samples. Alternative methods were performed to estimate the microbial mass in sheep feces. True digestibility was examined from sheep on either high corn grain or high soy hull diets. Results suggested differences in diet NDF level affects fecal microbial mass.
■590 ▼aSchool code: 0058.
■650 4▼aAnimal sciences.
■650 4▼aAgronomy.
■650 4▼aAgriculture.
■653 ▼aDigestibility
■653 ▼aFecal composition
■653 ▼aForage composition
■653 ▼aForage quality
■653 ▼aMethod development
■690 ▼a0475
■690 ▼a0285
■690 ▼a0473
■71020▼aCornell University▼bAnimal Science.
■7730 ▼tDissertations Abstracts International▼g85-03B.
■773 ▼tDissertation Abstract International
■790 ▼a0058
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16934604▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
■980 ▼a202402▼f2024
