The concept of digestible amino acids in diet formulation for pigs

Mosenthin, R.; Sauer, W. C.; Blank, Ralf; Huisman, J.; Fan, Ming Z.

doi:10.1016/s0301-6226(99)00139-6

Cited by 51 publications

(47 citation statements)

References 29 publications

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“…As defined by Mosenthin et al (2000), in this method the basal and the assay feed ingredient are evaluated simultaneously. The basal and the assay feed ingredient provide the sole assay nutrients in the diet.…”

Section: Discussionmentioning

confidence: 99%

Ileal amino acids digestibility of sorghum in weaned piglets and growing pigs

Landín

Souza

Авалос³

2010

Animal

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Section: Discussionmentioning

confidence: 99%

Ileal amino acids digestibility of sorghum in weaned piglets and growing pigs

Landín

Souza

Авалос³

2010

Animal

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mentioning

confidence: 90%

“…There is a general agreement that in pigs ileal rather than faecal digestibility measurements represent more accurate estimates of AA bioavailabilities since AA are only absorbed proximal to the distal ileum (Mosenthin et al, 2000). Ileal digestibilities are conventionally determined by collect-ing digesta of pigs fitted with intestinal cannulas at the terminal ileum or being surgically modified according to the ileal rectal anastomosis technique (Zimmermann and Mosenthin, 2002).…”

mentioning

confidence: 99%

Use of the mobile nylon bag technique for determination of apparent ileal digestibilities of crude protein and amino acids in feedstuffs for pigs

Steiner¹,

Bornholdt²,

Sauer³

et al. 2011

CZECH J ANIM SCI

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There is a general agreement that in pigs ileal rather than faecal digestibility measurements represent more accurate estimates of AA bioavailabilities since AA are only absorbed proximal to the distal ileum (Mosenthin et al., 2000). Ileal digestibilities are conventionally determined by collect- ABSTRACT: Three digestibility experiments were conducted to evaluate the potential of determination of apparent ileal digestibilities (AID) of crude protein (CP) and amino acids (AA) by the mobile nylon bag technique (MNBT) using 21 feedstuffs and three mixed diets. In two conventional digestibility experiments (Exp. 1 and 2), AID were determined using in total 10 barrows (BW 35 kg) fitted with simple T-cannulas at the terminal ileum. For the MNBT studies, four pigs were fitted with a simple T-cannula at the proximal duodenum and a Post-Valve T-Caecum (PVTC) cannula at the terminal ileum. The MNBT studies included the feedstuffs (n = 10) from Exp. 1 and 2 as well as 14 further feedstuffs and mixed diets in which AID coefficients had been determined in previous trials. For each feedstuff 60 nylon bags were used. In vitro digestion of the bags was carried out in pepsin-HCl solution with 450 IU pepsin/l at pH 2.0 and 37°C for 4 h. In the 28-day in vivo experiment, 15 nylon bags per pig and day were inserted through the duodenal cannula and collected through the PVTC cannula after passage through the small intestine. Coefficients of AID were calculated based on the disappearance of CP and AA from the nylon bags during the in vitro and in vivo phase. In comparison with AID determined by the conventional method, AID of CP was on average 2.4% lower, whereas AID of lysine was on average 8.5% higher when determined by the MNBT. There was no significant (P > 0.05) correlation between AID coefficients of CP and AA determined by the conventional method and the MNBT, when all feedstuffs were taken into account. However, in cereals (n = 11), the correlation between AID coefficients determined by both methods was significant (P < 0.05) for CP (r = 0.61) and some AA (r ranging between 0.62 and 0.72). In conclusion, the potential of the MNBT to determine AID of CP and AA is rather limited. Differences in coefficients of AID of CP and AA were attributed to several factors such as diffusion of sample particles or endogenous protein through the nylon bags as well as to the presence of anti-nutritional factors (e.g. in legume seeds and oilseed meals).

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“…Digestibility values determined by slop-ratio method underestimates the bioavailability of AA (Stein et al, 2007) so digestibility assays are considered better (Batterham, 1992;Ravindran and Bryden, 1999a;Parsons, 2002;Stein et al, 2007). Precise and accurate methodology is mandatory to determine DAA coefficients used in cost effective diet formulation and achieving best performance of birds (Mosenthin et al, 2000). Bioassay technique is extensively used to determine digestibility of AA in a single test either by collecting ileal digesta or excreta.…”

Section: Amino Acid Digestibilitymentioning

confidence: 99%

Digestible Amino Acids: Significance and Prospects in Poultry

Ullah¹,

Ali²,

Mehr-un-Nisa³

et al. 2015

IJAB

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Amino acids (AA) are protein's hydrolytic products. In the recent years, poultry diets are being formulated on digestible AA (DAA) basis rather than total AA. Different techniques including precision-fed rooster assay, precision-fed cecectomized rooster assay, ileal AA digestibility and precision-fed broiler chick assay are used to determine the DAA coefficients of feed ingredients. However, nutritionists consider that the ileal digestibility in growing and adult birds is more accurate than other techniques. In all these digestibility techniques, apparent AA digestibility is corrected for endogenous AA losses to achieve standardized AA digestibility values. The digestibility values, determined using different digestibility techniques, of any feed ingredient vary. This variation in digestibility values can be minimized by adopting same digestibility technique for the estimation of DAA coefficients. Birds fed diets formulated on DAA basis resulted in better growth performance, feed efficiency and production economics. The main objective of this review is to examine the poultry's performance fed diet formulated based on the DAA.

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The concept of digestible amino acids in diet formulation for pigs

Cited by 51 publications

References 29 publications

Ileal amino acids digestibility of sorghum in weaned piglets and growing pigs

Ileal amino acids digestibility of sorghum in weaned piglets and growing pigs

Use of the mobile nylon bag technique for determination of apparent ileal digestibilities of crude protein and amino acids in feedstuffs for pigs

Digestible Amino Acids: Significance and Prospects in Poultry

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