title: The impact of feeding growing-finishing pigs with daily tailored diets using precision feeding techniques on animal performance, nutrient utilization, and body and carcass composition.
abstract: The impact of moving from conventional to precision feeding systems in growing-finishing pig operations on animal performance, nutrient utilization, and body and carcass composition was studied. Fifteen animals per treatment for a total of 60 pigs of 41.2 (SE = 0.5) kg of BW were used in a performance trial (84 d) with 4 treatments: a 3-phase (3P) feeding program obtained by blending fixed proportions of feeds A (high nutrient density) and B (low nutrient density); a 3-phase commercial (COM) feeding program; and 2 daily-phase feeding programs in which the blended proportions of feeds A and B were adjusted daily to meet the estimated nutritional requirements of the group (multiphase-group feeding, MPG) or of each pig individually (multiphase-individual feeding, MPI). Daily feed intake was recorded each day and pigs were weighed weekly during the trial. Body composition was assessed at the beginning of the trial and every 28 d by dual-energy X-ray densitometry. Nitrogen and phosphorus excretion was estimated as the difference between retention and intake. Organ, carcass, and primal cut measurements were taken after slaughter. The COM feeding program reduced (P < 0.05) ADFI and improved G:F rate in relation to other treatments. The MPG and MPI programs showed values for ADFI, ADG, G:F, final BW, and nitrogen and phosphorus retention that were similar to those obtained for the 3P feeding program. However, compared with the 3P treatment, the MPI feeding program reduced the standardized ileal digestible lysine intake by 27%, the estimated nitrogen excretion by 22%, and the estimated phosphorus excretion by 27% (P < 0.05). Organs, carcass, and primal cut weights did not differ among treatments. Feeding growing-finishing pigs with daily tailored diets using precision feeding techniques is an effective approach to reduce nutrient excretion without compromising pig performance or carcass composition.
authors: Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, J1M 0C8, Canada Grupo de Modelagem Animal, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil.
authors: I
authors: I
authors: Andretta
authors: Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, J1M 0C8, Canada Candido.Pomar@agr.gc.ca.
authors: C
authors: C
authors: Pomar
authors: Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, J1M 0C8, Canada.
authors: J
authors: J
authors: Rivest
authors: Universidat de Lleida, Lleida, 25198, Spain.
authors: J
authors: J
authors: Pomar
authors: Grupo de Modelagem Animal, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil.
authors: P A
authors: PA
authors: Lovatto
authors: Grupo de Modelagem Animal, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil.
authors: J
authors: J
authors: Radünz Neto
mesh_terms: D015502:Absorptiometry, Photon; D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena / Q000502:physiology*; D000818:Animals; D001823:Body Composition / Q000502:physiology*; D001835:Body Weight / Q000502:physiology; D004032:Diet / Q000662:veterinary*; D005248:Feeding Methods / Q000662:veterinary*; D048788:Growth and Development / Q000502:physiology; D008297:Male; D018482:Muscle, Skeletal / Q000737:chemistry* / Q000502:physiology; D009584:Nitrogen / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism; D013552:Swine / Q000254:growth & development* / Q000502:physiology
chemical_list: D010758:Phosphorus; D009584:Nitrogen
keywords: feed efficiency; nutrient requirements; pigs; precision farming; precision feeding