Estimation of apparent ileal digestibility of amino acids in ingredients used in broiler diets and basal endogenous losses through meta-analysis approach PDF Download

Author: Héctor Hernando Salgado Romero
Publisher:
ISBN:
Category :
Languages : fr
Pages : 70

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Si l'objectif est d'optimiser l'utilisation des protéines par les volailles, l'utilisation d'un système d'acides aminés digestibles est probablement supérieure à la quantité totale d'acide aminé (tAA) présente dans le régime. Avec la quantité considérable d'informations présentes sur les valeurs nutritives d'acides aminés (AA) utilisées dans les régimes alimentaires de volailles, l'objectif de cette étude est de prédire la digestibilité d'AA basée sur une analyse proximale via une méta-analyse. Deux modèles ont été testés : 1) Y = digestibilité apparente des AA (AAdig, % diet) ; X = protéine brute (CP) (%) et 2) Y = AAdig (g/kg de DM) ; X = AA totaux analysés (tAA, g/kg de DM) dans lequel l'ordonnée à l'origine du graphique est la perte d'endogène (EL). Une base de données de 49 publications a été divisée en 5 sous-sections 1) céréales (orge, sorgho, blé et maïs), 2) tourteau de soja (SBM), 3) farines de viande et d'os (MBM) 4) La sous-section 1) ainsi que des fèves de faba et de pois pour étudier EL et 5) seulement des fèves de faba et des pois. L'étude et les ingrédients ont été inclus dans le modèle comme effets fixes. Pour les céréales, la prédiction des AAdig par CP est précise (R2 de 0.68 pour Thr et de 0.92 pour Ala). La pente est différente selon le type de céréales (céréale x CP ; P 0.05) pour la majorité des AA sauf pour le maïs qui n'a pas eu de relation significative avec CP (P 0.05). Dans le SBM et MBM, l'effet étude améliore la précision des modèles. Des ordonnées à l'origine négatives, et significativement différent de 0 (P

Author: Hanna Spindler
Publisher: Cuvillier Verlag
ISBN: 3736983158
Category : Science
Languages : en
Pages : 134

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In 2013, more than 308 million tons of cereals were produced within the European Union, of which about 60 million tons were grown as barley. The protein content of barley is rather low when compared to protein feedstuffs such as soybean meal. However, due to its high dietary inclusion level, up to half of the protein requirement of pigs can be met by barley.

Author: Elisa Strang
Publisher: Cuvillier Verlag
ISBN: 3736985460
Category : Science
Languages : en
Pages : 144

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Book Description
Cereal grains, such as rye and triticale are a major source of energy in pig nutrition. The crude protein (CP) content in cereal grains is rather low compared to protein ingredients such as soybean meal. However, costs and availability of soybean meal are strongly correlated with the price development of agricultural commodities on the world market. Therefore, swine producers will make increasing efforts to use protein from locally produced cereal grains more efficiently to reduce feed costs. Measurements of apparent (AID) and standardized ileal digestibility (SID) of CP and AA are frequently used to estimate the amounts of absorbable AA from the diet which are used for pigs’ metabolic processes. However, until now there is limited data on SID of CP and AA in rye and triticale, particularly in new genotypes. Therefore, one objective of the present work was to determine the variation in nutritional composition and SID of CP and AA of 8 currently available rye and 8 triticale genotypes. Standardized ileal digestibility of CP and most AA between the 8 assayed genotypes of both rye and triticale did not differ. Furthermore, average SID values of CP and AA of both rye and triticale in the present experiment were lower when compared to values of rye and triticale published in current feed tables. Thus, future research should clarify, whether these differences in comparison to feed tables are caused by experimental conditions or reflect a consistent decrease that need to be accounted for in feed tables.

Author: Institut national de la recherche agronomique (France)
Publisher:
ISBN:
Category : Animal feeding
Languages : en
Pages : 308

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Author:
Publisher: John Wiley & Sons
ISBN: 1119371171
Category : Medical
Languages : de
Pages : 1488

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The most complete and definitive reference to all aspects of poultry diseases, Diseases of Poultry, Fourteenth Edition has been fully revised and updated to offer a comprehensive survey of current knowledge. Updates the definitive reference of poultry health and disease Provides more clinically relevant information on management of specific diseases, contributed by clinical poultry veterinarians Offers information on disease control in organic and antibiotic-free production Presents more concise, streamlined chapters for ease of use Incorporates advances in the field, from new diagnostic tools and information to changes brought about by the increasing globalization and the re-emergence of zoonotic pathogens

Author: Hans-Dietrich Bock
Publisher: Oxford University Press, USA
ISBN:
Category : Medical
Languages : en
Pages : 472

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Book Description
Farm animals are grown mainly to provide high quality proteins for human use, in the form of meat, milk, eggs, skin and wool. These products are usually formed from lower-quality proteins in complex processes that involve losses through digestion, absorption, and transport. Because proteins are the most expensive major component of the animal diet per unit of weight, the efficiency with which they are used is of great importance biologically and economically. This book begins with a description of the dietary proteins and methods for their measurement. This is followed by detailed accounts of their digestion in ruminants, pigs, poultry and fish. The physiological basis of adsorption of amino acids is discussed in detail. This is followed by reviews of the processes of protein synthesis and degradation and the hormonal and energetic regulation of these processes. Written by a group of experienced scientists, this is the first book in which all of these topics are discussed in detail at a fundamental level. For advanced students and research workers in animal science and agriculture.

Author: Renata Urbaityte
Publisher: Cuvillier Verlag
ISBN: 3736930003
Category : Science
Languages : en
Pages : 142

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Book Description
A cautious assessment of standardised ileal digestibilities (SID) of crude protein (CP) and amino acids (AA) as a measure to describe AA bioavailabilities is critical for evaluating the protein value of feed ingredients for piglets. Estimates of SID have been generated for most feed ingredients for grower-finisher pigs, whereas corresponding values for piglets hardly exist. Until now, SID values determined in grower-finisher pigs are used in diet formulation for piglets as well. However, there is some concern that these values may not be valid in piglets due to a limited digestive capacity for feed protein in piglets. A guideline for the standardisation of the experimental procedure in digestibility experiments had already been proposed for grower-finisher pigs. These guidelines firstly include threshold levels for CP and AA in the assay diets to obtain so-called plateau apparent ileal digestibility values, which are independent of dietary CP and AA levels, and secondly values for IAALB. For piglets, similar guidelines, including dietary threshold levels and values for IAALB, have currently been established. Therefore, the objective of the thesis was, based on these guidelines, to determine SID of CP and AA in 24 assay feed ingredients, including 11 products from soybean processing, 7 by-products from starch processing, 2 fish meals and 4 whey proteins. For this purpose, a total of 4 digestibility experiments with piglets fitted with simple T-cannulas at the distal ileum was conducted. For each experiment, 14 barrows were weaned at 18 days of age. Each experiment consisted of 3 periods for digesta collection. A total of 24 semisynthetic cornstarch-based diets with various inclusion levels of casein were formulated to which 1 of the 24 assay feed ingredients each was added. The daily feed allowance was restricted to 30 g/kg of individual body weight throughout all experimental periods. The SID values were determined by difference to SID values in casein. The results of the present studies show large variations in SID values among differently processed soybean products (p0.05). The SID values in extruded soybeans (SBe) were lower compared to high-protein soybean meal (SBMhp), soy protein concentrate (SPC) or partially hydrolysed soy protein isolate (SPIh) (p0.05). Aqueous alcohol or water extraction in SPC or SPIh improved SID values compared to SBMhp (p0.05). The SID values among the 4 batches of SPC were similar (p0.05) and consistently high. Moreover, the SID values were similar in SPC and SPIh (p0.05). The SID values of in alternatively processed soy proteins including enzymatically fermented SPA and microbially fermented SPB, were inconsistent. For the 3 SPA products, SID increased numerically from values similar to SBMhp to values similar to SPC with increasing duration of enzymatic treatment. For SPB SID values were low and similar to SBe, which may be attributed to protein denaturation during microbial fermentation. The results of present study show for most AA similar SID values for all by-products of starch processing including pea protein (PeaP), wheat gluten (WG), corn gluten (CG), and potato protein (PotP) compared to SPC (p0.05) except for SID of Lys in WG and CG, and SID of Trp in CG were considerably lower compared to other products (p0.05). The particular low SID of Lys and Trp in WG and CG might be simply a reflection of an experimental error, because SID values by means of the difference method rely on sufficient high AA contribution levels to the assay diets, which was not achieved for the aforementioned AA. The results of the present study show that SID values in fish meal (FM1) and extracted fish meal (FM2e) vary considerably (p

Author: T. Veldkamp
Publisher:
ISBN:
Category :
Languages : en
Pages : 76

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Author: John F. Patience
Publisher: Springer Science & Business Media
ISBN: 9086867561
Category : Science
Languages : en
Pages : 264

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Book Description
'Feed efficiency in swine' has been prepared as a comprehensive treatise on the current state of our understanding of this topic which is so important to the pork industry. Each chapter is written by international authorities who understand both the science and application of their topic area. The book provides detailed insight into the many factors affecting feed efficiency, ranging from diet processing to herd health, from nutrition to physiology and from day-to-day barn management to the adoption of advanced technologies. The authors explain such practical aspects as the challenge of interpreting feed efficiency information obtained on farm or the role of liquid feeding. The authors also delve into more scientific topics such as amino acid or energy metabolism or animal physiology. This book is written for people who have a technical interest in pork production, including nutritionists, geneticists, farm management specialists, veterinarians, other academics and, of course, pork producers.

Author: Hany El-Shemy
Publisher:
ISBN: 9789535151715
Category :
Languages : en
Pages : 514

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Book Description
Worldwide, soybean seed proteins represent a major source of amino acids for human and animal nutrition. Soybean seeds are an important and economical source of protein in the diet of many developed and developing countries. Soy is a complete protein, and soy-foods are rich in vitamins and minerals. Soybean protein provides all the essential amino acids in the amounts needed for human health. Recent research suggests that soy may also lower risk of prostate, colon and breast cancers as well as osteoporosis and other bone health problems, and alleviate hot flashes associated with menopause. This volume is expected to be useful for student, researchers and public who are interested in soybean.