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Sodium hydroxide treatment of barley straw; effect of volume and concentration of solution on digestibility and intake by sheep

Published online by Cambridge University Press:  02 September 2010

M. C. N. Jayasuriya  and
Emyr Owen
M. C. N. Jayasuriya
Affiliation:
Department of Agriculture and Horticulture, University of Reading, Earley Gate, Reading, RG6 2AT
Emyr Owen
Affiliation:
Department of Agriculture and Horticulture, University of Reading, Earley Gate, Reading, RG6 2AT
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Summary

1. Four experiments have been carried out to determine the effect of treatment of spring-sown barley straw (var. Deba Abed) with sodium hydroxide (NaOH) solution and subsequent neutralization with hydrochloric acid (HCl) on its digestibility and intake by sheep.

2. In Experiment 1, chopped straw was mixed with 4·5 or 9·0 g NaOH in 200 or 800 ml water/100 g, straw, and after 24 hr neutralized with HCl and left for a further 24 hr before being offered to castrated male sheep (wethers) in a maintenance diet containing 35% concentrates. Organic-matter digestibility of straw significantly increased, by 8 and 11 percentage units respectively, after treatment with 200 ml solution containing 4·5 and 9·0 g NaOH. Volume of solution did not affect digestibility.

3. In Experiment 2, straw treated as in Experiment 1 was given ad libitum. The highest intake was for straw treated with 200 ml solution containing 4·5 g NaOH/100 g straw, treatment with 9·0 g NaOH giving a significantly lower intake but higher than that of untreated straw.

4. In Experiment 3, the in vitro digestibility of milled straw, treated as in Experiments 1 and 4, increased with increasing volumes of solution up to 120 ml/100 g straw, but the response to successive increments of NaOH declined progressively.

5. In Experiment 4 chopped straw was mixed with 4·5, 6·75 or 9·0 g NaOH in 30, 60 or 120 ml water/100 g straw and offered as in Experiment 1. Treatments significantly increased straw digestibility, by 8 to 16 percentage units. Increasing the volume of water from 30 to 60 ml significantly improved digestibility, by 5 percentage units at the two lower levels of NaOH. The response to an increase in the level of NaOH was less, and inconsistent. In vitro and in vivo digestibilities were significantly correlated, but it is concluded that the in vitro technique used overestimates the digestibility of treated straw.

Type
Research Article
Information
Animal Production , Volume 21 , Issue 3 , December 1975 , pp. 313 - 322
Copyright
Copyright © British Society of Animal Science 1975

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References

REFERENCES

Agricultural Research Council. 1965. The Nutrient Requirements of Farm Livestock. No. 2. Ruminants. Agricultural Research Council, London.Google Scholar
Beckmann, E. 1921. [Conversion of grain straw and lupins into feeds of high nutrient value.] Festsch v. Kaiser Wilhelm Ges. Forderung. Wiss Zehnjahrigen Jubiläum, pp. 18–26.Google Scholar
Carmona, J. F. and Greenhalgh, J. F. D. 1972. The digestibility and acceptability to sheep of chopped or milled barley straw soaked or sprayed with alkali. J. agric. Sci., Camb. 78: 477–485.CrossRefGoogle Scholar
Cochrane, W. G. and Cox, G. M. 1966. Experimental Designs. John Wiley and Sons, Inc., New York.Google Scholar
Donefer, E., Adeleye, I. O. A. and Jones, T. A. O. C. 1969. Effects of urea supplementation on the nutritive value of NaOH-treated straw. In Celluloses and their Applications (ed. Gould, R. F.). American Chemical Society, Washington DC.Google Scholar
Guggolz, J., Kohler, G. O. and Klopfenstein, T. J. 1971. Composition and improvement of grass straw for ruminant nutrition. J. Anim. Sci. 33: 151–156.CrossRefGoogle ScholarPubMed
Homb, T. 1948. Feeding experiments with alkali-treated straw. Meld. Norg. LandbrHøisk 28: 277–365.Google Scholar
Klopfenstein, T. J., Krause, V. E., Jones, M. J. and Woods, Walter. 1972. Chemical treatment of low quality roughages. J. Anim. Sci. 35: 418–422.CrossRefGoogle Scholar
Mwakatundu, A. G. K. 1970. A study of the nutritive value of alkali treated grass harvested at different stages of growth. M. Agric. Sci. Thesis, Univ. Reading.Google Scholar
Owen, E., Perry, F. G., Burt, A. W. A. and Pearson, M. C. 1969. Variation in the digestibility of barley straws. Anim. Prod. 11: 272 (Abstr.).Google Scholar
Ololade, B. G., Mowat, D. N. and Winch, J. E. 1970. Effect of processing methods on the in vitro digestibility of sodium hydroxide treated roughages. Can. J. Anim. Sci. 50: 657–662.CrossRefGoogle Scholar
Saxena, S. K., Otterby, D. E., Donker, J. D. and Good, A. L. 1971. Effects of feeding alkali treated straw supplemented with soyabean meal or non-protein nitrogen on growth of lambs and on certain blood and rumen liquor parameters. J. Anim. Sci. 33: 485–490.CrossRefGoogle ScholarPubMed
Singh, M. and Jackson, M. 1971. The effect of different levels of sodium hydroxide spray treatment of wheat straw on consumption and digestibility by cattle. J. agric. Sci. Camb. 77: 5–10.CrossRefGoogle Scholar
Thomsen, A. K. V., Rexen, F. and Kristensen, V. F. 1973. [Research into sodium hydroxide treatment of straw. 1. The effect of treatment on the digestibility of the straw.] Saertryk af ugeskrift for agronomer og hortonomer 25: 436–440.Google Scholar
Tilley, J. M. A. and Terry, R. A., 1963. A two-stage technique for the in vitro digestion of forage crops. J. Br. Grassld Soc. 18: 104–111.CrossRefGoogle Scholar
Van Soest, P. J. 1963. Use of detergents in the analysis of fibrous feeds. II. A rapid method for the determination of fibre and lignin. J. Ass. off. agric. Chem. 46: 829–835.Google Scholar
Van Soest, P. J. and Wine, R. H. 1968. Determination of lignin and cellulose in aciddetergent fibre with permanganate. J. Ass. off. agric. Chem. 51: 780–785.Google Scholar
Wilson, R. K. and Pigden, W. J. 1964. Effect of sodium hydroxide treatment on the utilization of wheat straw and poplar wood by rumen micro-organisms. Can. J. Anim. Sci. 44: 122–123.CrossRefGoogle Scholar