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Nutrient digestibility in poultry (OK-Net EcoFeed practice abstract)

{Tool} Nutrient digestibility in poultry (OK-Net EcoFeed practice abstract). Creator(s): Whistance, Lindsay. Issuing Organisation(s): ORC - Organic Research Centre. OK-Net EcoFeed practice abstracts, no. 014. (2020)

[img] PDF - English (Nutrient digestibility in poultry)
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Online at: https://orgprints.org/38640

Summary

Feed rations that consider nutrient digestibility can better utilise regional feedstuffs, optimising health, body maintenance and production requirements. They help to improve animal welfare, lower costs and reduce nitrogen pollution from compensatory feeding.
Practical recommendations
• Regular analysis of all dietary components is recommended for a reliable nutrient profile of feed rations.
• To optimise the use of home-grown feed, the nutrient content of forage should be considered in diet formulation.
• High quality protein fulfils amino acid (AA) requirements, particularly lysine, cysteine and methionine.
• Diets formulated on digestible amino acids (DAA) are more effective than those formulated using total AA content.
• Digestibility of AAs is affected by dietary fibre content and the presence of anti-nutritional factors and protease inhibitors.
• Adding permitted enzymes to the diet can stimulate the digestibility of all nutrients, particularly protein and complex carbohydrates. They may also help birds to break down anti-nutritional feed components
• Starch (simple carbohydrates) is the primary energy source for poultry and is generally well digested.
• Complex carbohydrates in grains (wheat, barley, rye and oats) increase viscosity which negatively affects digestive processes and nutrient absorption.
• Fibre is poorly digested but helps to slow down the passage rate of other nutrients in the gut, improving digestion of all nutrients. A high intake of fibre can risk a reduction in total intake so restriction may be necessary.
• Fat digestibility is linked to the presence of other dietary components, and minerals in particular.
• Fat improves feed palatability and is required for energy and the absorption of fat-soluble vitamins A, D, E, and K.
• Age of bird influences fat digestibility with older birds being better able to digest fat than younger birds.
• As with fibre, fat can reduce feed passage rate (influenced by fat type and quantity) through the gut, enhancing digestion of all nutrients.
• Processing feeds can improve overall digestibility although finely milled feed reduces protein digestibility and pancreatic enzyme activity compared to coarser feed.
• Heat treatments can reduce anti-nutritional factors and, e.g., steam pelleting, can improve carbohydrate digestibility.


EPrint Type:Practice tool
What problem does the tool address?:Producing fully organic poultry feed of regional origin is challenging, particularly for protein sources that offer balanced amino acid profiles. Furthermore, not all nutrients present in feed are available for digestion.
What solution does the tool offer?:To optimise feed rations, diets should be based on digestible nutrients, nutrient interactions and the influence of other feed characteristics.
Country:United Kingdom of Great Britain and Northern Ireland
Type of Practice Tool:Practice abstracts
Agrovoc keywords:
LanguageValueURI
Englishanimal husbandryhttp://aims.fao.org/aos/agrovoc/c_8532
Englishbroiler chickenshttp://aims.fao.org/aos/agrovoc/c_9435
Englishlayer chickenshttp://aims.fao.org/aos/agrovoc/c_12109
Englishfeedinghttp://aims.fao.org/aos/agrovoc/c_2838
Englishrationshttp://aims.fao.org/aos/agrovoc/c_6461
Subjects: Animal husbandry > Feeding and growth
Animal husbandry > Production systems > Poultry
Research affiliation: European Union > Horizon 2020 > OK-Net EcoFeed
European Union > Horizon 2020 > OK-Net EcoFeed > OK-Net Ecofeed Tools
UK > Organic Research Centre (ORC) - Elm Farm
H2020 or FP7 Grant Agreement Number:773911
Related Links:https://organic-farmknowledge.org/tool/38640, https://www.facebook.com/organicfarmknowledge/posts/823368305178975, https://twitter.com/farm_knowledge/status/1333361942023589888
Project ID:oknet
Deposited By: Forschungsinstitut für biologischen Landbau, FiBL
ID Code:38640
Deposited On:26 Nov 2020 14:19
Last Modified:10 Dec 2020 12:34
Document Language:English
Status:Published

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