The Determination of Digestibility and Metabolizable Energy Levels of Some Forages Commonly Used in Ruminant Nutrition by In Vitro Methods

Authors : Nihat DENEK

Pages : 115-122

View : 11 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :This study was carried out to determine the dry matter insert ignore into journalissuearticles values(DM); and organic matter insert ignore into journalissuearticles values(OM); digestibilities, and metabolizable energy levels of some forages commonly used in ruminant nutrition by 2 different in vitro methods; the enzyme technique and the 2- stage method insert ignore into journalissuearticles values(rumen fluid + HCl-pepcine);. Seven different samples of alfalfa hays, sainfoin hay and grass hay, and 4 different samples of wheat straws, lentil straw, corn silage and sorghum silage were used in the experiment. DM digestibilities were 51.53% for alfalfa hay, 47.79% for sainfoin hay, 41.02% for grass hay, 30.15% for wheat straw, 47.81% for lentil straw, 63.74% for corn silage and 53.25% for sorghum silage by the enzyme technique insert ignore into journalissuearticles values(P < 0.05);. OM digestibilities and metabolizable energy levels were 57.93% and 9.11 MJ/kg DM for alfalfa hays, 52.68% and 8.28 MJ/kg DM for sainfoin hay, 46.37% and 7.31 MJ/kg DM for grass hay, 33.73% and 5.25 MJ/kg DM for wheat straw, 53.49% and 8.19 MJ/kg DM for lentil straw, 67.92% and 10.74 MJ/kg DM for corn silage, and 56.75% and 8.88 MJ/kg DM for sorghum silage by enzyme technique insert ignore into journalissuearticles values(P < 0.05);. DM and OM digestibilities and metabolizable energy levels were 56.32%, 61.36% and 9.28 MJ/kg DM, respectively, for alfalfa hays, 50.21%, 56.21% and 9.07 MJ/kg DM, respectively, for sainfoin hay, 45.31%, 51.41% and 7.75 MJ/kg DM, respectively, for grass hay, 41.34%, 47.08% and 7.55 MJ/kg DM, respectively, for wheat straw, 49.67%, 56.56% and 9.16 MJ/kg DM, respectively, for lentil straw, 63.19%, 70.02% and 10.57 MJ/kg DM, respectively, for corn silage and 53.75%, 57.16% and 9.01 MJ/kg DM, respectively, for sorghum silage by the 2- stage method insert ignore into journalissuearticles values(P < 0.05);. When the 2 techniques were compared, the estimations of DM and OM digestibilities and metabolizable energy levels by both techniques were similar insert ignore into journalissuearticles values(P > 0.05); in all forages, except for wheat straw. DM and OM digestibilities and metabolizable energy levels of wheat straw were lower with the enzyme technique compared to the 2- stage method insert ignore into journalissuearticles values(P < 0.05);. In conclusion, the 2- stage method can be an alternative technique for determining forage digestibility and metabolic energy content to classical digestion trials.
Keywords : Forage, in vitro digestibility, metabolizable energy level