Maize Stem Tissues: Impact of Development on Cell Wall Degradability

Forage cell wall content (CWC), accounting for 400 to 600 g kg-1 dry matter (DM) (Van Soest, 1982) and its rumen degradability (CWD) are major factors influencing the animal's energy supply from forages. Therefore, in order to maximise the nutritional potential of forages for ruminants, the ability to accurately and rapidly measure CWD is crucial. This is becoming increasingly important as feed evaluation methods move towards assessing nutrient supply. While the measurement of CWD is largely based on the polyester bag technique an experiment was undertaken to study the potential of measuring CWD in vitro for different forage types.Three methods of measuring CWD were compared using four samples each of grass (G), grass silage (GS), maize silage (MS) and straw (S) in a factorial design. The methods were; 1) fresh (undried) forage, chopped to 1 cm lengths using an homogeniser, was incubated in the rumens of sheep in polyester bags (pore size 43um) for different lengths of time (0, 3, 8, 16, 24, 45 and 72h).

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Down-regulation of the AtCCR1 gene in Arabidopsis thaliana: effects on phenotype, lignins and cell wall degradability

Planta ◽

10.1007/s00425-003-0987-6 ◽

2003 ◽

Vol 217 (2) ◽

pp. 218-228 ◽

Cited By ~ 106

Author(s):

Thomas Goujon ◽

Valérie Ferret ◽

Isabelle Mila ◽

Brigitte Pollet ◽

Katia Ruel ◽

...

Keyword(s):

Arabidopsis Thaliana ◽

Cell Wall ◽

Down Regulation ◽

Cell Wall Degradability

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The effect of ammoniation on the nutritive value of wheat, barley and oat straws. I. Changes in chemical composition in relation to digestibility in vitro and cell wall degradability

Animal Feed Science and Technology ◽

10.1016/0377-8401(88)90064-8 ◽

1988 ◽

Vol 19 (1-2) ◽

pp. 159-171 ◽

Cited By ~ 37

Author(s):

V.C. Mason ◽

R.D. Hartley ◽

A.S. Keene ◽

J.M. Cobby

Keyword(s):

Cell Wall ◽

Chemical Composition ◽

Nutritive Value ◽

Cell Wall Degradability

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Measurement of the rate and extent of cell wall degradability in forages; a comparison of three methods

Proceedings of the British Society of Animal Science ◽

10.1017/s0308229600028786 ◽

1995 ◽

Vol 1995 ◽

pp. 111-111

Author(s):

E. R. Deaville ◽

D. I. Givens

Keyword(s):

Cell Wall ◽

Dry Matter ◽

Nutrient Supply ◽

Maize Silage ◽

Grass Silage ◽

Factors Influencing ◽

Major Factors ◽

Cell Wall Degradability ◽

Nutritional Potential

Forage cell wall content (CWC), accounting for 400 to 600 g kg-1 dry matter (DM) (Van Soest, 1982) and its rumen degradability (CWD) are major factors influencing the animal's energy supply from forages. Therefore, in order to maximise the nutritional potential of forages for ruminants, the ability to accurately and rapidly measure CWD is crucial. This is becoming increasingly important as feed evaluation methods move towards assessing nutrient supply. While the measurement of CWD is largely based on the polyester bag technique an experiment was undertaken to study the potential of measuring CWD in vitro for different forage types.Three methods of measuring CWD were compared using four samples each of grass (G), grass silage (GS), maize silage (MS) and straw (S) in a factorial design. The methods were; 1) fresh (undried) forage, chopped to 1 cm lengths using an homogeniser, was incubated in the rumens of sheep in polyester bags (pore size 43um) for different lengths of time (0, 3, 8, 16, 24, 45 and 72h).

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Structural characterization of low lignin (AC Assinobia) and high lignin (Normal) of oat hulls by Diffuse-Reflectance Fourier Transform Vibrational Infrared Spectroscopic analysis

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200013260 ◽

2003 ◽

Vol 2003 ◽

pp. 167-167

Author(s):

P. Yu ◽

J. J. McKinnon ◽

D. A. Christensen

Keyword(s):

Cell Wall ◽

Plant Cell Wall ◽

Cell Wall Polysaccharides ◽

Rumen Microorganisms ◽

Oat Hulls ◽

Cereal Straw ◽

Nutritional Qualities ◽

Cross Links ◽

Cell Wall Degradability

Oat hulls are a byproduct of the oat processing industry. Nutritionally, oat hulls are high in fiber, low in protein and are comparable to cereal straw as a feedstuff. As such, they are only suitable for ruminant feed. Due to the large supply, it is economically important to improve the nutritional qualities of this byproduct. Oat hulls contain hydroxycinnamic acids, which are covalently cross-linked to polysaccharides by ester bonds and to components of lignin mainly by ether bonds. These cross-links are a barrier to biodegradation and limit cell-wall degradability by rumen microorganisms. It is believed that these hydroxycinamic acids are among the factors most inhibitory to the biodegradability of plant cell wall polysaccharides.

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