Estimates of basal ileal endogenous losses of amino acids by regression analysis and determination of standardised ileal amino acid digestibilities from casein in newly weaned pigs

Eklund, M.; Mosenthin, R.; Piepho, Hans‐Peter; Rademacher, M.

doi:10.1002/jsfa.3129

Cited by 24 publications

(29 citation statements)

References 27 publications

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“…The IAAL B originated from estimates in piglets of the same age and genetics, and kept under the same experimental conditions fed at a similar feed intake level of 30 g/kg of BW (Eklund et al, 2008a). Only the IAAL B of Cys was obtained from grower pigs (Jørgensen and Gabert, 2001) as a value for Cys was not provided for piglets by Eklund et al (2008a). The SID of CP and AA in the assay diets were obtained according to equation (2):…”

Section: --mentioning

confidence: 99%

“…AmiPig, 2000;GfE, 2008;Rademacher et al, 2009). The SID of CP and AA are corrected for basal ileal endogenous CP and AA losses (IAAL B ), and are nearly independent of the CP and AA contents in the assay diets (Fan et al, 1995a;Eklund et al, 2008a and2008b). Thus, they represent the fundamental properties of the individual feed ingredients (Mosenthin and Rademacher, 2003), and they are more likely additive in mixed diets than apparent ileal digestibilities (AID) (Stein et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…If IAAL B are used at smaller dietary CP and AA levels to transform AID into SID, this correction may have a substantial impact on the determination of the SID, due to the fact that any possible inaccuracy in the estimation of IAAL B likely has a more pronounced effect on the determination of SID at smaller -E-mail: rhmosent@uni-hohenheim.de rather than at greater dietary CP and AA levels. Therefore, it has been generally accepted that SID should be determined from the AID measured at greater dietary CP and AA levels, ideally from the plateau AID (Fan et al, 1995a;Fan and Sauer, 1997;Eklund et al, 2008a).…”

Section: Introductionmentioning

confidence: 99%

“…Presently, there are only few reports on SID of CP and AA, which were determined in protein supplements for piglets. The key issues for the calculation of SID of CP and AA are (i) the measurement of plateau AID and (ii) estimates of IAAL B (Fan et al, 1995a), which have recently been determined in piglets (Eklund, 2007;Eklund et al, 2008a).…”

Section: Introductionmentioning

confidence: 99%

“…Since SID of CP and AA pigs may differ noticeably between piglets and grower-finisher pigs, the objective of this study was to determine SID of CP and AA in a variety of protein supplements of animal and plant origin according to experimental procedures as described previously by Eklund (2007) and Eklund et al (2008a).…”

Section: Introductionmentioning

confidence: 99%

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Determination of standardized ileal crude protein and amino acid digestibilities in protein supplements for piglets

Urbaityte

Mosenthin

Eklund

et al. 2009

Animal

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The objective of the study was to determine standardized ileal digestibilities (SID) of crude protein (CP) and amino acids (AA) in six ingredients commonly used in weanling pigs diets. The ingredients consisted of extruded soybeans (SB e ), high-protein soybean meal (SBM hp ), soy protein concentrate (SPC), hydrolyzed wheat gluten (WG h ), conventional fish meal 1 (FM1) and extracted fish meal 2 (FM2 e ). Each assay feed ingredient was added to a purified cornstarch-based basal diet supplemented with casein and crystalline AA, and SID of CP and AA of assay ingredients were estimated using the difference method. A total of 12 3-week-old barrows were surgically fitted with T-cannulas at the distal ileum. The piglets were allocated to four simultaneous 3 3 3 Latin-square designs with three animals and three periods each, resulting in six observations per assay diet. After 3 to 5 days recovery from surgery, each assay diet was fed at a level of 30 g/kg body weight. Each experimental period consisted of 5 days for adaptation to the assay diets and 2 days for ileal digesta collection. The SID of CP, Lys, Met, Thr and Trp were 73%, 78%, 76%, 66% and 71% in SB e ; 80%, 84%, 87%, 75% and 81% in SBM hp ; 86%, 89%, 89%, 78% and 83% in SPC; 87%, 60%, 88%, 76% and 79% in WG h ; 87%, 92%, 94%, 86% and 86% in FM1; and 79%, 86%, 89%, 80% and 74% in FM2 e , respectively. The greatest SID of indispensable AA were observed for FM1 and SPC (SID > 85% for most indispensable AA), followed by WG h , FM2 e and SBM hp (SID > 80% for most indispensable AA) and the smallest SID were obtained for SB e (SID , 80% for most indispensable AA). The SID of CP and indispensable AA in both types of fish meal, SBM hp and WG h were similar to SPC ( P 5 0.063 to 0.855), except for Arg ( P 5 0.010) and Lys ( P 5 0.001) in WG h , and Phe ( P 5 0.044) and Trp ( P 5 0.037) in FM2 e . The SID of CP and indispensable AA were smaller in SB e compared with SPC ( P , 0.001 to P 5 0.017), except for Lys ( P 5 0.136). The SID of CP and indispensable AA were consistently smaller in FM2 e compared with FM1 with significant differences for CP ( P 5 0.035), Phe ( P 5 0.028) and Trp ( P 5 0.008). Digestibility values measured in the present study can be used to formulate diets for piglets based on standardized ileal digestible contents of CP and AA.

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Section: --mentioning

confidence: 99%