Towards the prediction of feed intake capacity of modern broilers on bulky feeds

ABSTRACT: The use of alternative, often bulky ingredients is becoming widespread in poultry diets as the industry seeks to reduce its economic and environmental costs. Consequently, there is an increased need to accurately predict the performance of birds given such diets and identify their maximum...

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Autores principales:	James Taylor, Ilias Kyriazakis
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	adaptation bulk broiler feed intake water holding capacity Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/9a9b5c627fcd43a3b5c0c61b207a61eb
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spelling	oai:doaj.org-article:9a9b5c627fcd43a3b5c0c61b207a61eb2021-11-24T04:22:41ZTowards the prediction of feed intake capacity of modern broilers on bulky feeds0032-579110.1016/j.psj.2021.101501https://doaj.org/article/9a9b5c627fcd43a3b5c0c61b207a61eb2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S003257912100523Xhttps://doaj.org/toc/0032-5791ABSTRACT: The use of alternative, often bulky ingredients is becoming widespread in poultry diets as the industry seeks to reduce its economic and environmental costs. Consequently, there is an increased need to accurately predict the performance of birds given such diets and identify their maximum capacity for bulk. We offered diets diluted with a range of bulky ingredients to male Ross 308 broilers to assess their capacity for bulk and identify a bulk characteristic responsible for limiting intake. Four hundred ninety-five day-old broilers allocated into 45 pens, were offered a common starter diet until day (d) 7, and 1 of 9 grower diets from d 8 to 29 (Period 1). Each of the grower diets was diluted with either 30 or 60% of oat hulls (OH), wheat bran (WB), or grass meal (GM), or a mixture of 2 bulky ingredients at an inclusion level of 30% each (OHWB, OHGM, WBGM). From d 29 to 43 (Period 2), all birds were offered the bulkiest diet (GM60). A number of bulk characteristics were measured on the diets. Feed intake was measured daily, and birds were dissected on d 29 and 43 for organ and carcass measurements. During d 8 to 14 diet water-holding capacity (WHC) was more consistent in predicting feed intake when scaled per unit of body weight than any other bulk characteristic. However, this was no longer the case during d 15 to 28. In Period 2, the response and adaptation to the bulkiest diet was determined by previous experience to bulk. Birds offered a bulkier diet during Period 1, were better able to adapt the size of their digestive organs and increase scaled feed intake, such that there were no differences between these birds and those offered the GM60; the converse was the case for birds on the least bulky diets. We conclude that WHC is able to predict maximum intake on bulky diets in unadapted birds. Adaptation to bulky diets can be very fast, so that their high bulk content no longer limits feed intake and performance.James TaylorIlias KyriazakisElsevierarticleadaptationbulkbroilerfeed intakewater holding capacityAnimal cultureSF1-1100ENPoultry Science, Vol 100, Iss 12, Pp 101501- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adaptation bulk broiler feed intake water holding capacity Animal culture SF1-1100
spellingShingle	adaptation bulk broiler feed intake water holding capacity Animal culture SF1-1100 James Taylor Ilias Kyriazakis Towards the prediction of feed intake capacity of modern broilers on bulky feeds
description	ABSTRACT: The use of alternative, often bulky ingredients is becoming widespread in poultry diets as the industry seeks to reduce its economic and environmental costs. Consequently, there is an increased need to accurately predict the performance of birds given such diets and identify their maximum capacity for bulk. We offered diets diluted with a range of bulky ingredients to male Ross 308 broilers to assess their capacity for bulk and identify a bulk characteristic responsible for limiting intake. Four hundred ninety-five day-old broilers allocated into 45 pens, were offered a common starter diet until day (d) 7, and 1 of 9 grower diets from d 8 to 29 (Period 1). Each of the grower diets was diluted with either 30 or 60% of oat hulls (OH), wheat bran (WB), or grass meal (GM), or a mixture of 2 bulky ingredients at an inclusion level of 30% each (OHWB, OHGM, WBGM). From d 29 to 43 (Period 2), all birds were offered the bulkiest diet (GM60). A number of bulk characteristics were measured on the diets. Feed intake was measured daily, and birds were dissected on d 29 and 43 for organ and carcass measurements. During d 8 to 14 diet water-holding capacity (WHC) was more consistent in predicting feed intake when scaled per unit of body weight than any other bulk characteristic. However, this was no longer the case during d 15 to 28. In Period 2, the response and adaptation to the bulkiest diet was determined by previous experience to bulk. Birds offered a bulkier diet during Period 1, were better able to adapt the size of their digestive organs and increase scaled feed intake, such that there were no differences between these birds and those offered the GM60; the converse was the case for birds on the least bulky diets. We conclude that WHC is able to predict maximum intake on bulky diets in unadapted birds. Adaptation to bulky diets can be very fast, so that their high bulk content no longer limits feed intake and performance.
format	article
author	James Taylor Ilias Kyriazakis
author_facet	James Taylor Ilias Kyriazakis
author_sort	James Taylor
title	Towards the prediction of feed intake capacity of modern broilers on bulky feeds
title_short	Towards the prediction of feed intake capacity of modern broilers on bulky feeds
title_full	Towards the prediction of feed intake capacity of modern broilers on bulky feeds
title_fullStr	Towards the prediction of feed intake capacity of modern broilers on bulky feeds
title_full_unstemmed	Towards the prediction of feed intake capacity of modern broilers on bulky feeds
title_sort	towards the prediction of feed intake capacity of modern broilers on bulky feeds
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/9a9b5c627fcd43a3b5c0c61b207a61eb
work_keys_str_mv	AT jamestaylor towardsthepredictionoffeedintakecapacityofmodernbroilersonbulkyfeeds AT iliaskyriazakis towardsthepredictionoffeedintakecapacityofmodernbroilersonbulkyfeeds
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Towards the prediction of feed intake capacity of modern broilers on bulky feeds

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