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#Enzymes in poultry nutrition
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Article published the March 14, 2024
All grains, vegetable-based protein meals and their by-products used in poultry diets contain some levels of phytate phosphorous (PP). Depending on the ingredient type and source, a typical broiler chicken diet would contain between 2.2 to over 3.5 g/kg dietary PP. Research has shown that phytate anti-nutritional effects can reduce the digestibility of amino acids (AA) and minerals. Previously the ...
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This member gave a presentation on February 21, 2024
At the following event:
35th Annual Australian Poultry Science Symposium
Article published the January 16, 2024
I. INTRODUCTIONPhytase is commonly used in broiler diets at a typical dose level of 1000 FTU/kg feed to increase the P availability from phytate and reduce the need for inorganic phosphate inclusion. Increasing the phytase dose above this level is expected to further reduce the need to add inorganic phosphate and further reduce P excretion. In addition, if a phytase can break down phytate quickly ...
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Article published the January 12, 2024
I. INTRODUCTIONMannan is a plant based-NSP derived from polymerisation of mannose sugars, it is categorised as galactomannan or glucomannan based on the presence of galactose and glucose side chains (Aspinall, 1973). Generally, galactomannan is the dominant form in legumes (Sundu et al., 2012). The ratio between mannose to galactose dictates the water solubility of galactomannan where galactose ha ...
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Article published the January 12, 2024
I. INTRODUCTIONThe term ‘amino acid imbalances’ was probably originated by Elvehjem and Krehl (1955) and the topic was addressed by Harper and Rogers (1965). Their conclusion was that imbalances retard growth by altering the normal pathways of amino acid metabolism. Thus, while the relevance of amino acid imbalances to efficient chicken-meat production is recognised, a precise definiti ...
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Article published the January 12, 2024
I. BACKGROUNDThe scale of the Australian chicken-meat industry has increased at an extraordinarily rapid rate so that now chicken-meat is clearly the first preference of consumers in comparison to pork, beef and lamb. In 1990/91, the Australian population was 17.2 million with a per capita chicken-meat consumption of 23.9 kg; however, this increased by 61.0% to 27.7 million people and consumption ...
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Article published the September 11, 2023
I. IntroductionWheat and sorghum are the two major feed grains used in Australia for broiler diets; however, wheat is more common and is usually considered better quality than sorghum. The local chicken meat industry may have to increase by 60% to meet demand in 2050 so strategies are needed to promote sustainable chicken-meat production to meet this anticipated demand. Crude protein reductions in ...
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Article published the August 24, 2023
1. IntroductionAs feed grade amino acids are commercialized at prices that are economically feasible for including in industry poultry diets, nutritionists are able to better supply diets containing amino acid profiles more closely representing ideal amino acid profiles (Baker, 1997). Refinement of dietary amino acid profiles allows for reductions in crude protein (CP), inclusion levels of protein ...
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Article published the August 23, 2023
1. IntroductionThe global demand for chicken-meat is increasing. Globally, poultry meat is expected to represent 41% of all the protein from meat sources in 2030 and exceed the 34% share for pig meat, 20% for beef and 5% for sheep meat [1]. In Australia, the 46.9 kg per capita chicken-meat consumption in 2021/22 is clearly superior to pork (27.7 kg), beef (19.1 kg) and lamb (5.5 kg) with a 47.3% m ...
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Article published the August 8, 2023
I. IntroductionThe development of reduced-CP diets in broiler chickens is gaining more interest as it would drastically lessen the dependence on imported soybean meal which is strategically important for non-soybean producing regions such as Australia and Europe. Modest reductions in CP are already being realised by inclusions of unbound (synthetic or crystalline) methionine, lysine and threonine, ...
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Location:Sydney, New South Wales, Australia
Profile: Academic / scientific
Occupation: Animal Nutritionist
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