Abstract #T365
Section: Ruminant Nutrition
Session: Ruminant Nutrition: Beef II
Format: Poster
Day/Time: Tuesday 7:30 AM–9:30 AM
Location: Gatlin Ballroom
Session: Ruminant Nutrition: Beef II
Format: Poster
Day/Time: Tuesday 7:30 AM–9:30 AM
Location: Gatlin Ballroom
# T365
Nutrient intake, total digestibility, ruminal pH, and ammonia concentration of beef cattle fed diets containing soybean, corn, or sorghum silages.
Lilian Oliveira Rosa*1, Odilon Gomes Pereira1, Karina Guimarães Ribeiro1, Sebastião de Campos Valadares Filho1, Stefanie Alvarenga Santos2, Rilene Ferreira Diniz Valadares2, Andressa Fernanda Campos3, 1Viçosa Federal University, Viçosa, Minas Gerais, Brazil, 2Bahia Federal University, Salvador, Bahia, Brazil, 3Sao Paulo State University, Jaboticabal, Sao Paulo, Brazil.
Key Words: dry matter intake, forage source, ruminal parameter
Nutrient intake, total digestibility, ruminal pH, and ammonia concentration of beef cattle fed diets containing soybean, corn, or sorghum silages.
Lilian Oliveira Rosa*1, Odilon Gomes Pereira1, Karina Guimarães Ribeiro1, Sebastião de Campos Valadares Filho1, Stefanie Alvarenga Santos2, Rilene Ferreira Diniz Valadares2, Andressa Fernanda Campos3, 1Viçosa Federal University, Viçosa, Minas Gerais, Brazil, 2Bahia Federal University, Salvador, Bahia, Brazil, 3Sao Paulo State University, Jaboticabal, Sao Paulo, Brazil.
The aim of this work was to evaluate the nutrient intake, total digestibility and ruminal pH and ammonia concentration of beef cattle fed diets containing soybean, corn, or sorghum silages as forage sources. The experimental diets was composed for: 1 - soybean silage (SS); 2 - corn silage (CS); 3 - sorghum silage (SOS); 4 - 50% SS:50% CS; and 5 - 50% SS:50% SOS, on dry matter basis. Diets consisted of 60% silage and 40% concentrate (corn, soybean meal, urea, and mineral mixture), formulated to be isonitrogenous (12% CP, DM basis). Five adult crossbred Holstein-Zebu bulls, male no castrated, rumen-cannulated with an initial weight of 442 kg were distributed in a 5 × 5 Latin square design. The animals were kept in individual pens of approximately 10 m2, with protected feeders and waterier. Effects of diets (P < 0.01) were observed on the intakes of all nutrients, with the lowest intakes (P < 0.05) of dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber (NDF) and neutral detergent fiber corrected to ash and protein (NDFap) being observed in the animals fed with soybean silage as only forage source. For TDN intake, the highest values were found for diets containing corn silage and it associated with soybean silage. For most nutrients, the highest digestibilities values were found with the diets containing corn silage as only forage source or when it was associated with soybean silage. There was effect to collection time (P < 0.05) for ruminal pH (T, hours), adjusting quadratic model (Y = 6.0452 + 0.2648 × T – 0.09955 × T2, r2 = 83,4%), but no effects were observed to diets (D) and collection times and diets interaction (T × D) for the same parameter. However, no effects were detected to diets (D), collection time (T) and collection time and diets interaction (T × D) for ruminal ammonia concentration, with average of 6.25 mg/dL. Our results suggest that soybean silage, as only forage source, results in lower nutrients intake. However, animals fed with this silage had similar ruminal parameters compared the others diets.
Key Words: dry matter intake, forage source, ruminal parameter
