Ileal Digestibilities of Amino Acids in Pig Feeds and Their Use in Formulating Diets

Tanksley, T. D.; Knabe, D. A.

doi:10.1016/b978-0-407-01160-1.50010-5

Cited by 40 publications

(25 citation statements)

References 18 publications

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“…The potential of RSM as a pig feed component is also limited by its high crude fibre content, almost double that of SBM (124 vs. 60 g/kg) (Sauvant et al 2004) and this in turn reduces the energy value and nutrient digestibility of the diet (Fenwick 1982). A more compelling factor governing modern nutrition principles is the formulation of diets on the basis of NE (Noblet 2007) and ileal digestible lysine (Tanksley and Knabe 1993), permitting a more accurate value of ''true'' energy and AA availability to the pig. Previous studies on RSM have employed formulations on the basis of DE and/or total AA values (Aherne and Kennelly 1985;Keady and O'Doherty 1996); however, such methodologies have been found to overestimate the actual contribution of certain nutrients, particularly where ingredients with complex carbohydrates are involved (Noblet and Le Goff 2001;Noblet and van Milgen 2004).…”

Section: Discussionmentioning

confidence: 98%

“…However more recently, several authors have recommended the formulation of diets on a net energy (NE) and ileal digestible AA basis, as the energy value of protein or fibrous feeds may be overestimated when expressed on a DE (or ME) basis (Noblet 2007) and using total AA values is not an accurate estimate of amino acid availability (Sauer and Thacker 1986;Tanksley and Knabe 1993).…”

Section: Please Scroll Down For Articlementioning

confidence: 99%

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Influence of incrementally substituting dietary soya bean meal for rapeseed meal on nutrient digestibility, nitrogen excretion, growth performance and ammonia emissions from growing-finishing pigs

McDonnell

O’Shea

Figat

et al. 2010

Archives of Animal Nutrition

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A completely randomised design experiment was performed to examine the effects of replacing different levels of soya bean meal (SBM) with rapeseed meal (RSM) on the growth performance, carcass characteristics, apparent nutrient digestibility, nitrogen (N) balance and manure ammonia emissions of growing-finishing pigs. Pigs (n = 336; mean live weight 42.1 kg) were assigned to one of four dietary treatments containing per kg diet: 210 g SBM; 140 g SBM and 70 g RSM; 70 g SBM and 140 g RSM; and 210 g RSM. All diets were formulated on an ileal digestible amino acid, net energy and available phosphorus basis. There was no significant treatment effect on average daily gain, feed intake, feed conversion ratio and carcass characteristics. There was a linear decrease in gross energy digestibility (p < 0.01) as RSM increased at the expense of SBM in the diet. There was a linear decrease in urinary N excretion (p < 0.01), N digestibility (p < 0.05), total N excretion (p < 0.05) and N retention (p < 0.05) with increasing levels of RSM. There was no effect of dietary treatment on manure ammonia emissions. The results of this study indicate that RSM can be used as a direct replacement for SBM with no associated depression in performance, when formulated on an ileal digestible amino acid and net energy basis. Consumption of diets containing incremental levels of RSM linearly decreased urinary N and total N excretion, reflecting the associated decrease in crude protein concentrations.

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Section: Discussionmentioning

confidence: 98%

Section: Please Scroll Down For Articlementioning

confidence: 99%

Influence of incrementally substituting dietary soya bean meal for rapeseed meal on nutrient digestibility, nitrogen excretion, growth performance and ammonia emissions from growing-finishing pigs

McDonnell

O’Shea

Figat

et al. 2010

Archives of Animal Nutrition

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“…For example, Tanksley & Knabe (1984) determined the ileal digesitibilities of amino acids in a range of protein concentrates and cereals. Ileal digestibilities of amino acids in cottonseed meals and meat and bone meals were lower than in soyabean meals.…”

Section: Ileal Digestibility Of a M I N O A C I D Smentioning

confidence: 99%

Availability and Utilization of Amino Acids for Growing Pigs

Batterham

1992

Nutr. Res. Rev.

129

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“…A large number of studies have been carried out on the topic of amino acid digestibility in pigs during the last three decades. At present, it is well accepted that the ileal rather than faecal analysis method should be used to determine amino acid digestibility values in feedstuffs (e.g., Tanksley and Knabe, 1984;Sauer and Ozimek, 1986). Furthermore, the ileal analysis method is more sensitive than the faecal analysis method for determining differences in amino acid digestibility values as a result of differences in processing (Sauer et al, 1977;Knabe et al, 1989).…”

Section: Introductionmentioning

confidence: 99%

Variability of amino acid digestibility in pigs: inherent factors in feedstuffs and considerations in methodology

Sauer

He²,

Fan³

et al. 2001

J. Anim. Feed Sci.

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There is an abundance of information in the literature on apparent ileal amino acid digestibility values in feedstuffs for pigs. In addition to differences in ileal amino acid digestibility values between feedstuffs, there are surprisingly large differences in ileal amino acid digestibility values among different samples of the same feedstuff (in name). In addition to different processing conditions and inherent factors among samples of the same feedstuff, a proportion of the variation can be attributed to different approaches in methodology to determine amino acid digestibility values. It should also be kept in mind that other factors, including the technique used for collection of ileal digesta, may affect, depending on the feedstuff in question, amino acid digestibility values. As far as methodology is concerned, differences in dietary amino acid levels may contribute to the variation in ileal amino acid digestibility values within the same feedstuff. Dietary amino acid levels quadratically affect ileal amino acid digestibility values. In order to remove the effect of dietary amino acid levels, the plateau ileal amino acid digestibility values should be determined. Methods of determination, the direct versus difference versus regression method, can also affect ileal digestibility values within the same feedstuff. In order to estimate this variation, methods of determination specifically suited for different feedstuffs are recommended. As a concluding remark, it is important to take into account the previous considerations when amino acid digestibility values from the literature are compiled for the purpose of reference for diet formulation for pigs.

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Ileal Digestibilities of Amino Acids in Pig Feeds and Their Use in Formulating Diets

Cited by 40 publications

References 18 publications

Influence of incrementally substituting dietary soya bean meal for rapeseed meal on nutrient digestibility, nitrogen excretion, growth performance and ammonia emissions from growing-finishing pigs

Influence of incrementally substituting dietary soya bean meal for rapeseed meal on nutrient digestibility, nitrogen excretion, growth performance and ammonia emissions from growing-finishing pigs

Availability and Utilization of Amino Acids for Growing Pigs

Variability of amino acid digestibility in pigs: inherent factors in feedstuffs and considerations in methodology

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