The utilisation of various fats by turkeys of different ages

Whitehead, G. C.; Fisher, C.

doi:10.1080/00071667508416216

Cited by 67 publications

(30 citation statements)

References 6 publications

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“…The fatty acid absorption pattern was similar to a previous report in 2-, 4-and 8-week-old turkeys which indicated overall absorption of over 90% for maize oil and lard (Whitehead and Fisher, 1975). In contrast, it has been reported (Turner et al, 1999) that apparent overall lipid digestibility in diets containing 5 or 12% fat was 69 to 74% at 3 to 5 d and 72 to 76% at 9 to 11 d in poults.…”

Section: Discussionsupporting

confidence: 81%

Functional development and intestinal absorption in the young poult

Sklan

Noy²

2003

British Poultry Science

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1. Absorption, secretion of digestive enzymes and intestinal morphology were determined in poults from hatching to 19 d. 2. Oleic acid was approximately 80% absorbed at hatch and this changed little with age and was not influenced by fasting. In contrast, glucose and methionine were 48 to 56% absorbed at hatch and this increased to 75 to 80% at 4 d; however, this increase in absorption was inhibited by fasting. Percentage absorption of protein did not change between 5 and 19 d, whereas absolute uptake of fat and protein and net secretion of digestive enzymes and fatty acids and N to the duodenum increased with age and body weight (BW). 3. The length and diameter and villus size in the small intestines increased rapidly after hatch whereas the number of villi per cross section did not change with age. Duodenum and ileum surface area reached a plateau after 11 d whereas jejunal surface area continued to increase until 19 d. Duodenal and ileal surface area were not related to BW, but jejunal surface area was significantly correlated. 4. While the major part of the absorption occurred in the duodenum and upper jejunum, uptake of both protein and fat increased in the distal segments of the small intestine with age. Overall absorption of both fat and protein was correlated with BW. 5. It appears that in the posthatch poult intestinal surface area is not a limiting factor in growth, which was correlated with digestive secretions, fat and protein uptake.

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Section: Discussionsupporting

confidence: 81%

Functional development and intestinal absorption in the young poult

Sklan

Noy²

2003

British Poultry Science

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“…Nas primeiras semanas de idade da ave, a digestibilidade dos lipídeos é menor e aumenta com a idade (Whitehead & Fisher, 1975;Katangole & March 1980;Sell et al, 1986). Entre os fatores que afetam a digestão de lipídeos, estão os processos de adaptação e maturação das células absortivas do intestino (Moran Jr, 1985), a maturação dos órgãos para a produção e liberação de enzimas digestivas e também aqueles pertinentes aos diferentes tipos de alimento, sua natureza, composição química e a complexação entre os mesmos.…”

Section: Introductionunclassified

Efeito da idade dos frangos de corte sobre a atividade enzimática e digestibilidade dos nutrientes do farelo de soja e da soja integral

Sakomura

Bianchi²,

Pizauro

et al. 2004

R. Bras. Zootec.

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RESUMO -Esse trabalho visou investigar o efeito da idade de aves sobre a digestibilidade dos nutrientes da soja integral extrusada (SIE), soja integral tostada à vapor (SITV) e farelo de soja com óleo (FSO) na produção de enzimas digestivas do pâncreas. Cinco ensaios de digestibilidade foram conduzidos com frangos de corte de uma, duas, três, quatro e seis semanas de idade. Foi utilizada a metodologia de coleta total de excretas. A atividade das enzimas amilase e tripsina pancreática aumentou linearmente com a idade das aves, assim como o crescimento alométrico do pâncreas. A maior taxa de crescimento ocorreu na segunda semana, coincidindo com a fase de maior aumento da atividade das enzimas digestivas. Entretanto, para a atividade da lipase, o efeito da idade foi diferente para cada alimento. Para aves alimentadas com SITV, a atividade dessa enzima cresceu linearmente com a idade, enquanto nas alimentadas com SIE, FSO e ração, o efeito foi quadrático. Os coeficientes de digestibilidade da matéria seca e extrato etéreo e os valores de energia metabolizável dos tipos de sojas variaram em proporções diferentes em função da idade. Também, observou-se correlação positiva entre a digestibilidade do extrato etéreo e a atividade de lipase. Os valores de energia metabolizável aparente corrigida (EMAn) e verdadeira corrigida (EMVn) determinados para a SIE apresentaram comportamento quadrático em função da idade, ocorrendo aumento da energia metabolizável (EM) até a 3 a semana de idade e diminuindo a partir da 4 a semana. Entretanto, a EM da SITV, FSO e da ração não foi afetada pela idade da ave. O aproveitamento da energia dos alimentos varia com a idade das aves, em função de sua dependência da atividade enzimática. Palavras-chave: digestibilidade dos nutrientes, enzimas pancreáticas, soja integral processada Effect of Age on Enzyme Activity and Nutrients Digestibility for Broilers Fed Soybean Meal and Full Fat SoybeanABSTRACT -This work aimed to investigate the effect of broilers age in the digestibility of nutrients in extruded and toasted full fat soybean (EFFS and TFFS) and soybean meal plus oil (SMO), and in the production of digestive pancreatic enzymes. Five digestibility assays were carried out with broilers of one, two, three, four , and six weeks of age. Total collected excreta methodology was applied. The activities of amylase and pancreatic trypsin enzymes increased linearly with the broilers age, as well as the allometric growth of the pancreas. The highest allometric growth ratio occurred in the second week, coincidentally with the period of increasing activity of the digestive enzymes. However, for lipase activity, distinct age affect was found for each feeds. For birds fed on TFFS, the enzyme activity increased linearly with age, while those fed on EFFS, SMO, and concentrate a quadratic effect was observed. The digestibility coefficients for dry matter and ether extract and the soybeans metabolizable energy (ME) varied at different proportions by age. A positive correlation between ether extract digestib...

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“…Thereafter, it is generally accepted that fat utilization increases with age. Several researchers have supported this concept from a fat digestibility perspective [14,17,23]. The improvement in fat utilization with age is largely a function of increased bile production and intestinal lipase activity as the poult matures.…”

Section: Body Weight Gainmentioning

confidence: 91%

Extruded Full Fat Soybean in Diets for Male Turkey

Zelal¹,

Ma²,

Am³

2016

J Veterinar Sci Technol

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The aim of this research was to study the effect of different levels of the extruded full-fat soybean (EFFSB) on growth performance and serum lipids of male turkeys. A trial was carried out using 300 one day male turkey B.U.T (big 6) during 3 feeding periods (starter, grower and finisher, 18 weeks). Poults were selected and divided into four experimental groups with three replicates containing 25 poults each, in a completely randomized design, and were fed experimental diets for 18 weeks. Treatments consisted on: T1 (control, SBM), T2 (10% EFFSB), T3 (15% EFFSB) and T4 (20% EFFSB).There were negligible changes in mortality. The results showed that the level of feed intake was decreased, while feed efficiency and body weight gain was improved in male turkey fed with different levels of the EFFSB. As a result, the best growth performance was determined for male turkeys fed diets containing 15% and 20% of EFFSB, which was exceeded significantly (p<0.05).The experiment confirmed that addition of extruded full-fat soybean in male turkey diets had influenced on serum lipids, so that cholesterol and triglyceride were reduced significantly (p<0.05) on serum lipids of male turkey.

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The utilisation of various fats by turkeys of different ages

Cited by 67 publications

References 6 publications

Functional development and intestinal absorption in the young poult

Functional development and intestinal absorption in the young poult

Efeito da idade dos frangos de corte sobre a atividade enzimática e digestibilidade dos nutrientes do farelo de soja e da soja integral

Extruded Full Fat Soybean in Diets for Male Turkey

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