Naked oats: metabolisable energy yield from a range of varieties in broilers, cockerels and turkeys

Abstract

1. Naked oats belong to the same species as 'common oats', Avena sativa, but have a non-lignified husk which readily becomes detached during harvesting. The absence of the indigestible husk can be predicted to give an increased metabolisable energy (ME) content for poultry. 2. Measurements of true metabolisable energy (TME N ) were performed on 3-week-old broiler chicks (Cobb males), adult cockerels (ISA Brown, greater than one year old) and 7-week-old turkeys (BUT T8 males). The measurements were repeated in 2000, 2001 and 2002, with some measurements on a subset of varieties in 2004. 3. High-oil naked oat lines yielded 12% more energy (TME N ) than wheat. Naked oats, excluding the experimental high-oil lines, yielded 8Á5% more energy than simultaneously assayed wheat samples. 4. In samples from the 2004 harvest, conventional oats gave TME N values about 13% lower than those of wheat. 5. The addition of -glucanase produced an increase of about 4% in the apparent metabolisable energy (AME) of oats for broiler chickens. This effect was associated with a 70% decrease in the jejunal viscosity of broilers receiving a 500 g/kg naked-oat diet. 6. The oil content of naked oats was about 5 times greater than that of wheat, with the high-oil lines rising to more than 6 times greater. Naked oats had a lower starch content than wheat but not sufficiently lower to negate the energy benefits of the higher oil content. The crude protein (CP) contents of naked oats were similar to those of wheat, with the high-oil varieties tending to be higher in CP also.

Metabolizable energy and standardized ileal digestible amino acid contents of expeller-extracted canola meal fed to broiler chicks

“…The AID, SID, and apparent retention (excreta data) of nutrients for SECM and EECM were determined by substitution (MacLeod et al, 2008) with the corn-based basal diet as the basal diet using the following equation:…”

“…The SECM was included in the study for comparison with EECM. The corn-soybean meal-based basal diet was fed to determine nutrient digestibility and retention by the substitution method (MacLeod et al, 2008). The low-protein casein-cornstarch-based diet was fed to estimate basal endogenous AA losses for determining standardized ileal digestibility (SID) of AA.…”

Three hulless oat varieties show economic potential as organic layer feed grain

“…In the absence of variety-related physiological effects, producers should be guided by agronomic characteristics in variety selection, as higher yields will reduce the cost of hulless oat grain. At the same time, however, hulless oat varieties exist which show nutritional concentrations beyond the range of those studied here (Macleod et al, 2008). Such varieties may be sufficiently different to give rise to more pronounced effects on feed performance, positive or negative.…”

Calorific Value of Cereals and Cereal by-products in Growing Male Broilers

“…The vitamins and minerals supplementation was similar across all diets. The feed ingredients' AMEn was determined by substitution method according to Macleod et al (2008) using 3-weeks old male broilers as used by Woyengo et al (2010).…”

“…The ME intake influences the broiler's feed intake and growth performance (Leeson and Summers, 2001;Morris, 2004) that's why poultry diets are formulated to fulfill bird's ME requirement (Nadeem et al, 2005). Precise and accurate assessment of feed ingredient's ME is mandatory to prepare a balanced diet with a definite calorific concentration (Scott et al, 1998;Nadeem et al, 2005;Macleod et al, 2008). The feed ingredient's nutrient composition influences its calorific value (Toghyani et al, 2014) and this nutrient composition is affected by varying plant genetics, soil conditions, agronomic practices and climatic changes (Ravindran et al, 2014).…”