Article published the March 22, 2021
I. INTRODUCTION
Exogenous phytase improved ileal amino acid digestibility by an average of 5% based on 745 observations across 24 studies in a systematic review (Cowieson et al., 2017). Nevertheless, the post-enteral availability of amino acids is ultimately determined by their transition across enterocytes in the gut mucosa. Amino acids may be denied access to the portal circulation because the ...
Article published the February 25, 2021
Both glucose and amino acids are essential for muscle protein deposition and feed conversion efficiency. Total tract nitrogen retention was reported to be influenced by protein and starch digestion in broiler chickens (Liu et al., 2013). Embracing the concept of digestive dynamics and applying it in practical diet formulation requires understanding of the variations of protein and starch digestion ...
This member gave a presentation on February 10, 2021
At the following event:
32nd Annual Australian Poultry Science Symposium
Article published the January 3, 2020
Introduction
The influence of protein and energy on growth performance and carcass traits in broiler chickens have been intensively studied in the literature and the investigation is ongoing because the performance of modern broiler chickens improves every couple of years as a result of successfully selective breeding program. However, starch and lipid are the two major source of energy in typica ...
Article published the July 23, 2019
1. Introduction
Sorghum has been described as an enigmatic grain for chicken meat production because sorghum-based broiler diets have been associated with sub-optimal performance of chickens under Australian conditions (Selle et al., 2013). Six red 'tannin-free' grain sorghum varieties harvested on the Liverpool Plains of New South Wales in 2009 were extensively characterised and compared in broi ...
Article published the May 18, 2017
1. Introduction
Meat-and-bone meal (MBM) is a potential source of protein, calcium and phosphorus in poultry diets for some parts of the world, including Australia, China and Southeast Asia. However, there are considerable variations in its protein quality and Ca and P concentrations. Ravindran et al. (2002) reported substantial variations in ash (13.0e56.5 g/100 g), crude protein (38.5e67.2 g/10 ...
Article published the March 29, 2017
1. Introduction
Sorghum is a problematic feed grain for chicken-meat production which has been considered in two reviews (Selle et al., 2010; Liu et al., 2015). A distinctive feature of sorghum is kafirin, the dominant protein fraction. Kafirin classically makes up 55% of sorghum protein and is present as discrete protein bodies located in the sorghum endosperm with a central core of a-kafirin en ...
Article published the November 18, 2016
1. Introduction
The occurrence of ‘wet litter’ in meat chicken sheds is associated with concerns regarding animal welfare, flock health, food safety, environmental impacts and reductions in production efficiency. Mitigating wet litter will only be achieved when there is thorough understanding of the multidimensional causal factors. This will require a multidisciplinary approach to un ...
Article published the October 7, 2016
1. Introduction
Primarily for the provision of energy density, grain sorghum is quite frequently included in rations for pigs, poultry and feed-lot cattle. However, in a recent meeting held by the Australian Feed Grain Partnership in December 2012, nutritionists from the three industries expressed concern about the efficiency of energy utilisation in animals offered sorghum-based diets. Essentia ...
Article published the August 22, 2016
1. Introduction
At times, sorghum provides, either partially or entirely, the feed grain base in Australian pig and poultry diets but it has been associated with sub-optimal or inconsistent growth performance in broiler chickens (Selle et al., 2010a; Liu et al., 2015a). A beneficial characteristic for including sorghum in broiler diets is as a source of energy, which is mainly derived from starc ...