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Digestibility of triticale and barley grains given to sheep whole ground or treated with urea

Cyprus Agricultural Research Institute Technical Bulletin (74): 1-5
Digestibility of triticale and barley grains given to sheep whole ground or treated with urea
Apparent digestion coefficients of triticale (TG) and Athenais barley (AG) grains fed whole or ground were determined. In a second experiment, digestion coefficients of untreated (C), urea sprayed (US) or urea sprayed and stored (USS) grains were determined. In both trials the animals were offered a basic diet (400 g concentrate + 200 g barley straw, as fed) of known digestibility and 400 g of the ingredient on test. Grinding did not improve the dry matter (DM) digestibility of the whole diet (ground grains 76%, whole grains 76.2%) or that of the ingredient on test (ground grains 84.8%, whole grains 85.7%). Rumen fermentation pattern, rumen pH (ground grains 6.5, whole grains 6.5) and NH3-N concentration (ground grains 126, whole grains 188 mg/l) were also similar. No significant differences were found in DM digestibility between barley and triticale grains (expt. 1:AG 84.2%, TG 86.3%; expt. 2:AG 86.6%, TG 89.5%). The addition of urea improved dry matter digestibility (C 85.3%, US 90.6%). Storage of urea-sprayed grains did not improve digestibility (US 90.6%, USS 91.2%). Feeding urea-treated grains increased rumen-NH3 concentration (C 174, US 450, USS 360 mg/l) but there were no differences among treatments for rumen fermentation pattern or rumen pH.

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Accession: 005161414

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