[No Title Available]

Abstract

Diets formulated with protein sources presenting different resistance to ruminal degradation were compared by evaluating ruminal parameters, production and microbial efficiency and nutrients flow to the omasum in goats. Eight rumen cannulated non-lactating, non-pregnant goats were distributed in a 4 × 4 Latin square design with two replicates. Treatments consisted of four diets where different sources of plant protein accounted for the major protein source named soybean meal, source of higher ruminal degradability, and three other sources of higher resistance of degradation: roasted soybean, corn gluten meal, and cottonseed cake. Amounts of rumen protein were similar among rations; however, flows of dry matter, protein and non-fiber carbohydrate to omasum were higher for diets with protein source with reduced rumen degradation rate. Higher values of rumen ammonia were obtained by using ration with soybean meal as major source of protein. Higher values of pH were obtained for rations with roasted soybean e cottonseed cake. Regarding kinetic of transit, similar values were found among rations. Diets with protein sources presenting reduced ruminal degradation increase nutrients flow to the omasum in goats and alter digestive parameters such as pH and ammonia without compromising bacteria growth and efficiency, which grants their use for dairy goats with similar efficiency to rations using more degradable sources of protein.

Effect of Different Rumen Undegraded Protein Level on Feed Consumption, Nutrient Digestion, Body Weight and Body Condition Score in Early Lactating Dairy Cattle

“…Bunnakit and Khampa (2011) reported that DMI and OM digestibility in Thai Native x Brahman cattle increased linearly while the level of RUP increased. In another study, the use of protein source with lower rumen degradability promotes an increase in the flow of nutrients and changes in the digestive parameters of the omasum, but compromise the production or microbial efficiency in dairy goats (Felisberto et al, 2011). …”

Desmids (Zygnematophyceae) from the littoral zone of an urban artificial lake: taxonomic aspects and geographical distribution

“…L: 125.7 µm, W: 18.9 µm. Geographic distribution in the Paraná State: Bittencourt-Oliveira & Mecenas (1994); Felisberto & Rodrigues (2008.…”

Cloning of oligopeptide transport carrier PepT1 and comparative analysis of PepT1 messenger ribonucleic acid expression in response to dietary nitrogen levels in yak (Bos grunniens) and indigenous cattle (Bos taurus) on the Qinghai–Tibetan plateau1

“…During malnourished states, peptides would mainly come from body protein degradation of the gastrointestinal tract (Backwell, 1994), and the protein released from the small intestine can maintain animal growth or meet the needs of low level performance (Armentano et al, 1993). Moreover, highprotein diets improve the gastrointestinal microbial protein synthesis for dairy goats (Felisberto et al, 2011) and fish (Ostaszewska et al, 2010). Liu et al (2014) reported that the fish gastrointestinal PepT1 mRNA ex- pression is greater under extreme dietary N levels (35.2 or 67.2 g N/kg DM).…”