Influence of Salix babylonica and Leucaena leucocephala leaf extracts on ruminal fermentation characteristics, urinary purine derivative excretion and microbial protein synthesis of lambs

Abstract

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Tropical legume supplementation influences microbial protein synthesis and rumen ecology

“…In contrast, Hernandez et al. () found that oral administration of Leucaena leucocephala extracts at 30 ml/d to lambs for 63 days had minor effects on ruminal fermentation, urinary purine derivative excretion and microbial protein synthesis.…”

“…Hence, reducing protozoal populations could improve dietary N utilization and increase microbial protein synthesis flow to the intestine (Wang et al, 2012). In contrast, Hernandez et al (2014) found that oral administration of Leucaena leucocephala extracts at 30 ml/d to lambs for 63 days had minor effects on ruminal fermentation, urinary purine derivative excretion and microbial protein synthesis.…”

“…Leucaena , highly nutritious, is an important source of feeds for ruminants. Leucaena contained plant secondary compounds which can improve nutrient digestibility, feed utilization, cow's milk production and lamb live weight gain (Hernandez et al., ; Salem et al., ). The potential attributes of Leucaena are limited because of the presence of toxic amino acid mimosine.…”

Influence of dietary supplementation with sunflower oil and quebracho tannins on growth performance and meat fatty acid profile of Awassi lambs

“…Consequently, tannins have been suggested to be suitable feed additives towards improving the digestive utilization of dietary protein (Hernandez et al, 2014;Salem et al, 2014). Nevertheless, tannins may also cause negative effects like reduction of ruminal degradation of organic matter (OM) or decreasing fiber and dry matter (DM) digestion when supplied at 30 rather than at 10 and 20 g tannins/kg DM (Al-Dobaib, 2009;Ammar et al, 2011;Salem et al, 2013).…”

Energy utilization, nitrogen balance and microbial protein supply in cattle fed Pennisetum purpureum and condensed tannins

“…Several of those species contain secondary metabolites such as condensed tannins (CT), which are found in foliages, fruits and cortex; and when they are consumed by ruminants, form chemical complexes with proteins and carbohydrates, which reduce rumen degradation of those components (Ramirez‐Restrepo et al., ) and favours the passage of undegraded (‘bypass’) protein and the absorption of amino acids from the small intestine (Soltan et al., ). In addition, CT may increase microbial protein synthesis (Anantosook et al., ; Hernandez et al., ), increase nitrogen retention, reduce emissions of N 2 O from urine and reduce fermentation of fiber (Barry and Manley, ; Soltan et al., ).…”