AFAF A. R. MABROUK*, R. M. BROWNING
and D. G. ARMISTRONG
Deptartment of Agricultural Biochemistry and Nutrition, University of
Newcastle upon Tyne, NE2 7 RU, U.K.
SUMMARY
Different chemical treatments of barley i.e. formaldehyde alone and in combination with wood sugar, acetic acid and isobutyric acid were ivestigated for their effects on rumen degradation of dry matter (D.M.), nitrogen and starch in barley. Four Jersey cows, equipped with rumen fistula were used for rumen incubation of chemically treated barley samples and control (untreated barley) contained in dacron bags. Following incubation, samples of all treatments and control were analysed for dry matter, nitrogen and starch. Some of the formaldehyde containing treatments were apparently more effective than others.
In conclusion, formaldehyde combined with wood sugar, acetic acid and isobutyric acid gives more protection of barley starch and nitrogen than formaldehyde alone, or formaldehyde combined with wood sugar. combination of formaldehyde with acetic acid or with two acids (acetic and isobutyric acids) appear to enhance the protection of nitrogen and starch in barley, and that all of these treatments were more effective than the one containing no formaldehyde.
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