Dry matter and cellulose digestibility were not affected by the urea infusions. The apparent nitrogen digestibility, derived from the difference between feed and faecal N, and ignoring infused N, was slightly depressed by urea infusions of from 9 to 34 g N/day, but at the highest level of infusion (43.7 g N/day) it was equal to or greater than the control value. Rumen pH and VFA concentrations ...

Trials on animals and human subjects have shown that the proteins as contained in wholemeal are less well utilized than those in white flour. Macrae and his 5 volunteers (Macrae, Hutchinson, Irwin, Bacon and McDougal, 1942) found the average coefficients of apparent digestibility of the nitrogen in bread made from flours of 100 per cent. and 73 per cent. extraction to be, respectively, 85.5 and...

Hemicellulose consists primarily of pentose sugars, joined together in a polysaccharide chain with D-xylose as the most abundant component. Ileal digestibility and urinary excretion of D-xylose and associated effects of this pentose sugar on ileal and faecal digestibility of dry matter (DM), organic matter (OM), gross energy (GE) and nitrogen were studied in pigs. Castrated pigs were prepared w...

The digestive tract of ferrets is anatomically simple, with no caecum, ileocolic valve or external differentiation between the transition of ileum and colon. The species has a short large intestine that provides minor contributions to the digestive process. Aiming to better understand the digestibility efficiency of ferrets, the present study compared the digestibility of extruded diets with di...

A total of 210 twenty twoday-old broiler chicks were used in this programme to investigale the performance, [ca\ intake, digestibility and visceral organ mass of broiler chicks fed with high level of olive pulp.supplemented with two antibiotics: streptomycin and tylosin. The two antibiotics were added to supply 150 nig/kg of the active ingredient. Chicks which consumed the medicated diets had m...

Two experiments were conducted to determine the lysine:DE ratio that would maximize nitrogen retention and lean growth in growing pigs. Diets were formulated to contain 2.5, 3.0, 3.5, or 4.0 g of lysine/Mcal of DE at 3.5 and 3.75 Mcal of DE/kg of diet arranged in a 4 x 2 factorial. Experiment 1 used 48, 20-kg crossbred barrows in a nitrogen balance study. Feeding diets containing 3.75 Mcal of D...

Measures of amino acid (AA) digestibility are used widely to estimate bioavailability of AA in feed and food ingredients for monogastric animals. In principle, the digestibility assay is simpler than in vivo assessments of AA bioavailability and allows for simultaneous estimation of the bioavailability of all AA in an experimental diet. It is generally assumed that absorption of intact AA in th...

The true ileal digestibility assay provides the most informative measure of digestibility to assess bioavailability of amino acids in foods for humans. To determine 'true' estimates of ileal amino acid digestibility, requires that endogenous amino acids present in digesta at the terminal ileum be quantified. The amounts of endogenous amino acids in ileal digesta can be determined after feeding ...

ABSTRACT- Ninety six 2-week-old British United Turkeys (BUT) Big 6 were assigned to 2 groups (4 replicates of 12 birds each). One basal diet and another one in which 20% canola meal replaced the corn starch in the basal diet were prepared. At 9, 16 and 21 wk of age, four birds from each pen slaughtered for digesta collection. The last two-third segment of the intestine, between the Meckel’s div...

the aim of this study was to determine the effects of ensiling and using of fertilizers nitrogen and phosphorus on chemical composition and ruminal dm degradability of safflower plant (carthamustinctorius l.). the safflower plant was cultivated at december 2009, and harvested at june 2010 in flowering stage, chopped to 3-5 cm particles and then ensiled in the laboratory silos for 60 days. the e...