The effect of diet composition on tryptophan requirement of young piglets

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21 Citations (Scopus)

Abstract

The aim of the study was to evaluate the requirement for Trp in relation to diet composition in piglets in the period after weaning (BW range of 9 to 24 kg). Two Trp deficient (relative to the Dutch (CVB, 1996) and NRC (NRC, 1998) requirement values for piglets of 10 to 20 kg BW) basal diets were formulated; one based on corn and soybean meal and a second one based on wheat, barley, soybean meal, peas and whey powder (10.0 g/kg apparent ileal digestible (AID) Lys; 1.4 g/kg AID Trp; 1.5 g/kg standardised ileal digestible (SID) Trp). Both basal diets were supplemented with 0.3, 0.6 and 0.9 g L-Trp per kg diet to obtain diets with 1.7, 2.0 and 2.3 g AID Trp per kg (1.8, 2.1 and 2.4 g SID Trp per kg), respectively. Each of the 8 treatments was evaluated in 8 replicates (pens with eight male or female piglets). Average daily feed intake, ADG, and G:F were measured as response criteria. Over the 28-d experimental period, ADG and G:F were greater for the treatments on the wheat/barley diet compared to those on the corn/soybean meal and were increased by the level of Trp in the diet (P <0.05). Average daily feed intake was only increased by the level of Trp supplementation (P <0.05). Increasing the Trp level increased ADFI for the corn/soybean meal diet up to 2.3 g AID Trp per kg (2.4 g SID Trp per kg) and up to 2.0 g AID Trp per kg (2.1 g SID Trp per kg) in the wheat/barley diet (P <0.05). For both diets types supplementation of free L-Trp increased the G:F up to 1.7 g AID Trp per kg (1.8 g SID Trp per kg). Non-linear regression analysis of the response curves for ADFI using an exponential model for estimating a requirement value for Trp (defined as the Trp level resulting in 95% of the maximum response) revealed a requirement estimate of 2.3 g AID Trp per kg for the corn/soybean meal based diet and 2.1 g AID Trp per kg for the wheat/barley based diet, equivalent to 2.4 and 2.2 g SID Trp per kg diet, respectively. For ADG, a requirement estimate of 2.1 g AID Trp per kg for both types of diets was derived, equivalent to 2.2 g SID Trp per kg diet. The Trp requirement for young piglets seems to be greater than indicated by some commonly used recommendations and does not seem largely dependent on diet ingredient composition
Original languageEnglish
Pages (from-to)1017-1027
JournalJournal of Animal Science
Volume88
Issue number3
DOIs
Publication statusPublished - 2010

Fingerprint

Tryptophan
tryptophan
piglets
Diet
diet
Soybeans
soybean meal
Meals
Hordeum
Triticum
Zea mays
barley
wheat
corn
feed intake
whey powder
Peas
corn meal
Weaning
Powders

Keywords

  • chronic lung inflammation
  • amino-acid pattern
  • growth-performance
  • growing-pigs
  • lysine requirement
  • protein accretion
  • terminal ileum
  • metabolism
  • ratio
  • digestibility

Cite this

@article{ac696fc0e93545058249189644054951,
title = "The effect of diet composition on tryptophan requirement of young piglets",
abstract = "The aim of the study was to evaluate the requirement for Trp in relation to diet composition in piglets in the period after weaning (BW range of 9 to 24 kg). Two Trp deficient (relative to the Dutch (CVB, 1996) and NRC (NRC, 1998) requirement values for piglets of 10 to 20 kg BW) basal diets were formulated; one based on corn and soybean meal and a second one based on wheat, barley, soybean meal, peas and whey powder (10.0 g/kg apparent ileal digestible (AID) Lys; 1.4 g/kg AID Trp; 1.5 g/kg standardised ileal digestible (SID) Trp). Both basal diets were supplemented with 0.3, 0.6 and 0.9 g L-Trp per kg diet to obtain diets with 1.7, 2.0 and 2.3 g AID Trp per kg (1.8, 2.1 and 2.4 g SID Trp per kg), respectively. Each of the 8 treatments was evaluated in 8 replicates (pens with eight male or female piglets). Average daily feed intake, ADG, and G:F were measured as response criteria. Over the 28-d experimental period, ADG and G:F were greater for the treatments on the wheat/barley diet compared to those on the corn/soybean meal and were increased by the level of Trp in the diet (P <0.05). Average daily feed intake was only increased by the level of Trp supplementation (P <0.05). Increasing the Trp level increased ADFI for the corn/soybean meal diet up to 2.3 g AID Trp per kg (2.4 g SID Trp per kg) and up to 2.0 g AID Trp per kg (2.1 g SID Trp per kg) in the wheat/barley diet (P <0.05). For both diets types supplementation of free L-Trp increased the G:F up to 1.7 g AID Trp per kg (1.8 g SID Trp per kg). Non-linear regression analysis of the response curves for ADFI using an exponential model for estimating a requirement value for Trp (defined as the Trp level resulting in 95{\%} of the maximum response) revealed a requirement estimate of 2.3 g AID Trp per kg for the corn/soybean meal based diet and 2.1 g AID Trp per kg for the wheat/barley based diet, equivalent to 2.4 and 2.2 g SID Trp per kg diet, respectively. For ADG, a requirement estimate of 2.1 g AID Trp per kg for both types of diets was derived, equivalent to 2.2 g SID Trp per kg diet. The Trp requirement for young piglets seems to be greater than indicated by some commonly used recommendations and does not seem largely dependent on diet ingredient composition",
keywords = "chronic lung inflammation, amino-acid pattern, growth-performance, growing-pigs, lysine requirement, protein accretion, terminal ileum, metabolism, ratio, digestibility",
author = "A.J.M. Jansman and {van Diepen}, J.T.M. and M.B. Melchior",
note = "Online first",
year = "2010",
doi = "10.2527/jas.2008-1627",
language = "English",
volume = "88",
pages = "1017--1027",
journal = "Journal of Animal Science",
issn = "0021-8812",
publisher = "American Society of Animal Science",
number = "3",

}

The effect of diet composition on tryptophan requirement of young piglets. / Jansman, A.J.M.; van Diepen, J.T.M.; Melchior, M.B.

In: Journal of Animal Science, Vol. 88, No. 3, 2010, p. 1017-1027.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - The effect of diet composition on tryptophan requirement of young piglets

AU - Jansman, A.J.M.

AU - van Diepen, J.T.M.

AU - Melchior, M.B.

N1 - Online first

PY - 2010

Y1 - 2010

N2 - The aim of the study was to evaluate the requirement for Trp in relation to diet composition in piglets in the period after weaning (BW range of 9 to 24 kg). Two Trp deficient (relative to the Dutch (CVB, 1996) and NRC (NRC, 1998) requirement values for piglets of 10 to 20 kg BW) basal diets were formulated; one based on corn and soybean meal and a second one based on wheat, barley, soybean meal, peas and whey powder (10.0 g/kg apparent ileal digestible (AID) Lys; 1.4 g/kg AID Trp; 1.5 g/kg standardised ileal digestible (SID) Trp). Both basal diets were supplemented with 0.3, 0.6 and 0.9 g L-Trp per kg diet to obtain diets with 1.7, 2.0 and 2.3 g AID Trp per kg (1.8, 2.1 and 2.4 g SID Trp per kg), respectively. Each of the 8 treatments was evaluated in 8 replicates (pens with eight male or female piglets). Average daily feed intake, ADG, and G:F were measured as response criteria. Over the 28-d experimental period, ADG and G:F were greater for the treatments on the wheat/barley diet compared to those on the corn/soybean meal and were increased by the level of Trp in the diet (P <0.05). Average daily feed intake was only increased by the level of Trp supplementation (P <0.05). Increasing the Trp level increased ADFI for the corn/soybean meal diet up to 2.3 g AID Trp per kg (2.4 g SID Trp per kg) and up to 2.0 g AID Trp per kg (2.1 g SID Trp per kg) in the wheat/barley diet (P <0.05). For both diets types supplementation of free L-Trp increased the G:F up to 1.7 g AID Trp per kg (1.8 g SID Trp per kg). Non-linear regression analysis of the response curves for ADFI using an exponential model for estimating a requirement value for Trp (defined as the Trp level resulting in 95% of the maximum response) revealed a requirement estimate of 2.3 g AID Trp per kg for the corn/soybean meal based diet and 2.1 g AID Trp per kg for the wheat/barley based diet, equivalent to 2.4 and 2.2 g SID Trp per kg diet, respectively. For ADG, a requirement estimate of 2.1 g AID Trp per kg for both types of diets was derived, equivalent to 2.2 g SID Trp per kg diet. The Trp requirement for young piglets seems to be greater than indicated by some commonly used recommendations and does not seem largely dependent on diet ingredient composition

AB - The aim of the study was to evaluate the requirement for Trp in relation to diet composition in piglets in the period after weaning (BW range of 9 to 24 kg). Two Trp deficient (relative to the Dutch (CVB, 1996) and NRC (NRC, 1998) requirement values for piglets of 10 to 20 kg BW) basal diets were formulated; one based on corn and soybean meal and a second one based on wheat, barley, soybean meal, peas and whey powder (10.0 g/kg apparent ileal digestible (AID) Lys; 1.4 g/kg AID Trp; 1.5 g/kg standardised ileal digestible (SID) Trp). Both basal diets were supplemented with 0.3, 0.6 and 0.9 g L-Trp per kg diet to obtain diets with 1.7, 2.0 and 2.3 g AID Trp per kg (1.8, 2.1 and 2.4 g SID Trp per kg), respectively. Each of the 8 treatments was evaluated in 8 replicates (pens with eight male or female piglets). Average daily feed intake, ADG, and G:F were measured as response criteria. Over the 28-d experimental period, ADG and G:F were greater for the treatments on the wheat/barley diet compared to those on the corn/soybean meal and were increased by the level of Trp in the diet (P <0.05). Average daily feed intake was only increased by the level of Trp supplementation (P <0.05). Increasing the Trp level increased ADFI for the corn/soybean meal diet up to 2.3 g AID Trp per kg (2.4 g SID Trp per kg) and up to 2.0 g AID Trp per kg (2.1 g SID Trp per kg) in the wheat/barley diet (P <0.05). For both diets types supplementation of free L-Trp increased the G:F up to 1.7 g AID Trp per kg (1.8 g SID Trp per kg). Non-linear regression analysis of the response curves for ADFI using an exponential model for estimating a requirement value for Trp (defined as the Trp level resulting in 95% of the maximum response) revealed a requirement estimate of 2.3 g AID Trp per kg for the corn/soybean meal based diet and 2.1 g AID Trp per kg for the wheat/barley based diet, equivalent to 2.4 and 2.2 g SID Trp per kg diet, respectively. For ADG, a requirement estimate of 2.1 g AID Trp per kg for both types of diets was derived, equivalent to 2.2 g SID Trp per kg diet. The Trp requirement for young piglets seems to be greater than indicated by some commonly used recommendations and does not seem largely dependent on diet ingredient composition

KW - chronic lung inflammation

KW - amino-acid pattern

KW - growth-performance

KW - growing-pigs

KW - lysine requirement

KW - protein accretion

KW - terminal ileum

KW - metabolism

KW - ratio

KW - digestibility

U2 - 10.2527/jas.2008-1627

DO - 10.2527/jas.2008-1627

M3 - Article

VL - 88

SP - 1017

EP - 1027

JO - Journal of Animal Science

JF - Journal of Animal Science

SN - 0021-8812

IS - 3

ER -