TY  - JOUR
T1  - Dried Ruminal Contents as a Substitute for Alfalfa Hay in Growing-Finishing Diets for Feedlot Cattle
AU - Pujol-Manriquez, C. AU - Juarez-Reyes, A.S. AU - Estrada-Angulo, A. AU - Bermudez-Hurtado, R.M. AU - Rincon, F.G. Rios 
JO  - Journal of Animal and Veterinary Advances
VL  - 9
IS  - 10
SP  - 1526
EP  - 1530
PY  - 2010
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2010.1526.1530
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2010.1526.1530
KW  - alfalfa
KW  -cattle
KW  -metabolism
KW  -digestion
KW  -Ruminal contents
KW  -ruminal digestion
AB  - Eight Holstein steers (458&plusmn;14 kg) with cannulas in rumen and proximal duodenum were used in a crossover design experiment to determine the feeding value of air Dried Rminal Contents (DRC). Treatments consisted of a steam-flaked corn-based growing diet containing (DMB) 30% of either Alfalfa hay (ALF) or DRC. The ALF contained 93.4% DM, 17.1% CP, 36.7% ADF, 1.0% EE and 7.3% ash. The DRC contained 92.8% DM, 12.5% CP, 44.3% ADF, 3.8% EE and 5.9% ash. Ruminal contents were obtained at a local cattle slaughtering facility. The material was first conveyed over a screen to separate liquids and solids. Solids were then spread over a concrete surface and allowed to air-dry. Dry matter intake was restricted to 9.6 kg head<SUP>-1</SUP>. Substituting DRC for ALF in the diet decreased ruminal digestion of OM 18% (p&lt;0.01) and ADF (46.3%, p&lt;0.01), postruminal digestion of OM (17.7%, p&lt;0.01), total tract digestion of OM (15.4%, p&lt;0.01), ADF (32.3%, p&lt;0.01), N (12.0%, p&lt;0.01) and DE, Mcal kg<SUP>-1</SUP> (11.5%, p&lt;0.01). Substituting DRC for ALF in the diet increased (p&lt;0.01) ruminal microbial efficiency (24.2%, p&lt;0.01) and ruminal N efficiency (19.8%, p&lt;0.01). The estimated DE value of DRC was 1.21 Mcal kg<SUP>-1</SUP>, approximately 51% of medium-quality alfalfa hay.
ER  -