Relationship of Chemical Analysis to In Vitro Digestibility for selected Tropical and Temperate Grasses

Barton, Franklin E.; Amos, H. E.; Burdick, D.; Wilson, R. L.

doi:10.2527/jas1976.432504x

Cited by 49 publications

(39 citation statements)

References 15 publications

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“…To date, lignin and acid detergent fiber have given the best correlations with in vivo dry matter digestibility (16). However, neither of these measures yields accurate predictions of digestibility of different forage species from a single regression equation (1,14). These and many other measures commonly used for describing forage composition are based on gravimetric methods rather than upon analysis of specific chemical constituents.…”

Section: Introductionmentioning

confidence: 99%

Correlations of Phenolic Acids and Xylose Content of Cell Wall with In Vitro Dry Matter Digestibility of Three Maturing Grasses

Burritt¹,

Bittner²,

Street³

et al. 1984

Journal of Dairy Science

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Section: Introductionmentioning

confidence: 99%

Correlations of Phenolic Acids and Xylose Content of Cell Wall with In Vitro Dry Matter Digestibility of Three Maturing Grasses

Burritt¹,

Bittner²,

Street³

et al. 1984

Journal of Dairy Science

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“…Assim, essas variações são atribuídas às diferenças entre espécies e genótipos, estádios de desenvolvimento, condições ambientais e práticas de manejo. Nesse sentido, Barton et al (1976), ao investigarem as relações entre composição química e DIVMS de forrageiras tropicais e de clima temperado, obtiveram equações de regressão para predizer a digestibilidade de todas as espé-Tabela 2 -Coeficientes de digestibilidade in vitro da matéria seca (DIVMS) e teores de fibra em detergente neutro (FDN), fibra em detergente ácido (FDA), lignina e celulose de três gramíneas nas estações chuvosa e seca…”

Section: Resultsunclassified

Características anatômicas e valor nutritivo de quatro gramíneas predominantes em pastagem natural de Viçosa, MG

Bauer¹,

Gomide²,

Silva³

et al. 2008

R. Bras. Zootec.

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RESUMO -Avaliou-se a influência das características anatômicas e dos sítios de lignificação dos tecidos sobre o valor nutritivo de lâminas foliares de quatro gramíneas coletadas nas estações chuvosa e seca. Amostras frescas das duas últimas lâminas foliares recém-expandidas, correspondentes à última e à penúltima posição no perfilho de capim-gordura (Melinis minutiflora Pal. De Beauv), capim-braquiária (Brachiaria decumbens Staph.), capim-sapé (Imperata brasiliensis Trin.) e capim-jaraguá (Hyparrhenia rufa (Nees) Staph.) foram avaliadas quanto às características anatômicas, segundo técnicas de microscopia de luz e varredura. Nessas amostras analisou-se a proporção de tecidos e de sítios de lignificação. Também foram determinadas as concentrações de fibra em detergente neutro (FDN), fibra em detergente ácido (FDA), lignina e celulose da parede celular, assim como a digestibilidade in vitro da matéria seca (DIVMS). Os dados foram analisados segundo delineamento inteiramente casualizado, com os tratamentos no esquema fatorial, com três repetições. Determinaram-se as correlações entre DIVMS, componentes químicos da parede celular e proporção de tecidos. Observou-se o mesmo padrão de proporção de tecidos e DIVMS no capim-gordura e no capim-braquiária, assim como nos capins sapé e jaraguá. A digestibilidade in vitro da matéria seca e os componentes da parede celular sofreram influência da estação, enquanto as características anatômicas não foram significativamente influenciadas por esse fator. Os capins gordura e braquiária caracterizaram-se por maiores proporções de bainha parenquimática do feixe e os capins sapé e jaraguá por maiores

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“…Comparable samples of similar stem material showed that cell walls had about 25% (w/w) lignin as determined by the permanganate (KMnO 4 ) method. 2 The sections were sterilised with ethylene oxide in a commercial canister (Ben Venue Laboratories Inc., Bedford, Ohio, USA, Model No. VIII) and then aseptically placed on agar plates (2% w/v, Difco, Detroit, MI, USA) with no addition of nutrients.…”

Section: Samplesmentioning

confidence: 99%

“…7 These data help explain some of the problems encountered when a chemometric model is developed for a spectroscopic method to determine composition but the compositional entity does not correlate well across species. 2,8 An early attempt to modify the AOACProsky procedures to include cellulases to degrade forage cell walls showed that the tissues do respond the same across the forage species for enzymatic assays, however, these procedures are long and arduous, and require skilled analysts to give consistent results. 9,10 There needs to be some method for the unambiguous assessment of quality that can be determined spectroscopically to preclude the generation of waste laboratory chemicals and to increase the efficiency of analysis.…”

Section: Introductionmentioning

confidence: 98%

“…[1][2][3] Several studies of these forages showed that they responded differentially to the reagents used to assess composition. [4][5][6] In the initial study, Akin et al 1 found that the tissues which comprised the residue acid detergent fibre (ADF) for the cool-season [one that utilises a three carbon acid (C-3) photosynthetic pathway] grass fescue, were not the same as the warm-season grass [one that utilises a four carbon acid (C-4) photosynthetic pathway] Coastal Bermudagrass.…”

Section: Introductionmentioning

confidence: 99%

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Two-Dimensional Vibrational Spectroscopy III: Interpretation of the Degradation of Plant Cell Walls by White Rot Fungi

Barton

Himmelsbach

Akin

et al. 1995

Journal of Near Infrared Spectroscopy

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The degradation of lignocellulose by white rot fungi has been studied by two-dimensional vibrational spectroscopy to examine the particular functional groups on specific carbohydrates affected by the organisms. The organisms: P. chrysosporium K-3 (Pc), cellulase-less mutant 3113 from P. chrysosporium K-3, cellulase-less mutant 85118-b from P. chrysosporium K-3, Phellinus pini RAB-83-19 (Pp) and C. subvermispora FP 90031-sp (Cs) (and both P. pini and C. subvermispora), differed in the extent to which they removed the phenolic moiety from the carbohydrates and differed in the way that they utilised them. The Cs appears preferentially to utilise the C-5 carbohydrates while the Pc and Pp are much less specific, as evidenced by the changes in the 800-1200 cm -1 C-O-C region of the mid-infrared spectrum. The cellulase-less mutants do not appear to be as active as the Pc and Pp and provide a gradient by which the other organisms' activity can be assessed. The fungal biomass seems to obscure the interpretation at the longer wavelengths, but the 2000 cm -1 region is highly correlated to both carbohydrate and lignin wavelengths in the near infrared spectrum. The 2D technique permits a look at the degradation process and a way to see quickly the differing effects of the fungi on plant cell walls.

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Relationship of Chemical Analysis to In Vitro Digestibility for selected Tropical and Temperate Grasses

Cited by 49 publications

References 15 publications

Correlations of Phenolic Acids and Xylose Content of Cell Wall with In Vitro Dry Matter Digestibility of Three Maturing Grasses

Correlations of Phenolic Acids and Xylose Content of Cell Wall with In Vitro Dry Matter Digestibility of Three Maturing Grasses

Características anatômicas e valor nutritivo de quatro gramíneas predominantes em pastagem natural de Viçosa, MG

Two-Dimensional Vibrational Spectroscopy III: Interpretation of the Degradation of Plant Cell Walls by White Rot Fungi

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