title: Hydrolyzed porcine mucosa in broiler diets: effects on growth performance, nutrient retention, and histomorphology of the small intestine.
abstract: The effect of including hydrolyzed porcine mucosa sprayed into soybean meal (HPM) in the diet was studied in broilers. In experiment 1 (pen study), 1,080 one-day-old chicks were used in a completely randomized design with 8 treatments arranged as a 4 × 2 factorial with 4 levels of HPM (0, 2.5, 5.0, and 7.5%) and 2 levels of Lys (1.23 and 1.38%). From d 1 to 22, HPM inclusion quadratically improved BW gain (BWG, P < 0.01) and feed conversion ratio (FCR, P < 0.01). From d 1 to 8, birds fed 1.38% Lys had higher BWG (P < 0.05) and better FCR (P < 0.05) than birds fed 1.23% Lys but only a trend (P < 0.08) for improved BWG was detected from d 1 to 22. From d 22 to 37, a period in which all birds received a common finisher diet, growth performance was not affected by the previous starter diet. In experiment 2 (battery study), birds were fed for 37 d the same diets used in the starter period of experiment 1. Broilers fed HPM had higher BWG (linear, P < 0.05; Quadratic, P < 0.05) than birds fed control diet, and birds fed 1.38% Lys had higher BWG (P < 0.01) than birds fed 1.23% Lys. From d 1 to 22, BWG (P < 0.05) and ADFI (P < 0.01) increased quadratically and FCR improved linearly (P < 0.05) with HPM inclusion. Also in this period, BWG was higher at the higher Lys level (P < 0.01). Diet did not affect intestinal histomorphology of broilers on d 8 or nutrient retention on d 22. We conclude that the inclusion of 2.5 to 5% HPM in the diet improved growth performance of broilers from d 1 to 22. An increase in Lys from 1.23 to 1.38% improved growth performance up to 15 d of age, but not thereafter. Diet did not affect villus histomorphology or nutrient retention of the small intestine.
authors.affiliation: Departamento de Producción Animal, Universidad Politécnica de Madrid, 28040 Madrid, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Frikha
authors.forename: M
authors.initials: M
authors.lastname: Mohiti-Asli
authors.forename: C
authors.initials: C
authors.lastname: Chetrit
authors.forename: G G
authors.initials: GG
authors.lastname: Mateos
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena / Q000187:drug effects; D000818:Animals; D002645:Chickens / Q000033:anatomy & histology / Q000254:growth & development / Q000502:physiology*; D002851:Chromatography, High Pressure Liquid / Q000662:veterinary; D004032:Diet / Q000662:veterinary; D019587:Dietary Supplements / Q000032:analysis; D004063:Digestion / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D006868:Hydrolysis; D007421:Intestine, Small / Q000033:anatomy & histology / Q000187:drug effects*; D008239:Lysine / Q000008:administration & dosage / Q000378:metabolism*; D009092:Mucous Membrane / Q000737:chemistry*; D011897:Random Allocation; D034421:Sus scrofa
chemical_list: D008239:Lysine
keywords: broiler performance; hydrolyzed porcine mucosa; intestinal histomorphology; lysine