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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Pigs receiving daily tailored diets using precision-feeding techniques have different threonine requirements than pigs fed in conventional phase-feeding systems

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Remus, Aline [1, 2, 3] ; Hauschild, Luciano [3] ; Corrent, Etienne [4] ; Letourneau-Montminy, Marie-Pierre [2] ; Pomar, Candido [1, 2, 3]
Total Authors: 5
[1] Agr & Agrifood Canada, Sherbrooke Res & Dev Ctr, Sherbrooke, PQ J1M 0C8 - Canada
[2] Univ Laval, Dept Sci Anim, Quebec City, PQ G1V 0A6 - Canada
[3] Univ Sao Paulo State UNESP, Dept Anim Sci, Sch Agr & Vet Studies FCAV, BR-14883108 Jaboticabal, SP - Brazil
[4] Ajinomoto Anim Nutr Europe, F-75817 Paris 17 - France
Total Affiliations: 4
Document type: Journal article
Web of Science Citations: 2

There is large variation in amino acids requirements among pigs, hence feeding pigs individually with daily tailored diets or in groups with a single feed may require different levels of nutrients. Thus, the response to different threonine levels (70%, 85%, 100%, 115%, and 130% of the ideal threonine:lysine protein ratio of 0.65) was studied in growing pigs raised in a conventional group phase-feeding (GPF) system or fed individually using individual precision-feeding (IPF) techniques. In a 21-day trial, 110 barrows (25 +/- 0.80 kg body weight) were housed in the same room and fed using electronic feeders. Five pigs per treatment were slaughtered at the end of the trial. Threonine intake increased linearly for the IPF and GPF pigs (P < 0.05). Lysine intake was similar across the treatments. Average daily gain, gain:feed ratio, and protein deposition were affected linearly by threonine level (P < 0.05) in both feeding systems. Protein deposition in the GPF pigs was maximized at 150 g/d and a 0.65 threonine:lysine ratio, whereas protein deposition increased linearly in the IPF pigs. Plasma Met and serine levels were 11 and 7% higher, respectively, in the IPF pigs than in the GPF pigs (P < 0.05). Dietary threonine increased (P < 0.05) threonine concentration in the longissimus dorsi in a quadratic manner in the IPF pigs, whereas there was no effect in the GPF pigs. Longissimus dorsi collagen decreased as dietary threonine increased in the IPF and GPF pigs (P < 0.10). Carcass muscle crude protein was 2% higher in the GPF pigs than in the IPF pigs (P < 0.05). Individual pigs are able to modulate growth and the composition of growth according to threonine intake. The average amino acid ratio value that is currently used for GPF cannot be used for IPF. (AU)

FAPESP's process: 16/09703-2 - The ideal protein profile for growing pigs precision feeding systems: threonine
Grantee:Aline Remus
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 14/25075-6 - Ideal amino acids profile to individual x population: verifying sulfur amino acids ratio to lysine for growing pigs
Grantee:Aline Remus
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 12/03781-0 - Sustainable precision feeding systems (PFS) for swine and poultry: estimating real-time individual nutrient requirements (pigs) and evaluation of the PFS (pigs and poultry)
Grantee:Luciano Hauschild
Support type: Research Grants - Young Investigators Grants