Nutritional plans for boars

• Published in: Revista brasileira de zootecnia 2012-06, Vol.41 (6), p.1448-1453
• Main Authors: Kiefer, Charles, Donzele, Juarez Lopes, Oliveira, Rita Flavia Miranda de, Suguisawa, Liliane, Suguisawa, Jorge Murilo, Marques, Ana Carolina Wider
• Format: Article
• Language: English
• Subjects: AGRICULTURE, DAIRY & ANIMAL SCIENCE; amino acids; ideal protein; nutrition; requirement; VETERINARY SCIENCES
• ISSN: 1516-3598; 1806-9290; 1516-3598; 1806-9290
• DOI: 10.1590/S1516-35982012000600019

The objective of the present study was to evaluate nutritional plans for boars. Four hundred animals of 67 to 135 days of age and initial weight of 27.75±1.61 kg were distributed in a randomized block design with seven nutritional plans for boars (9.0-8.0; 9.0-9.0; 10.0-9.0; 10.0-10.0; 11.0-10.0; 11.0-11.0 and 12.0-11.0 g/kg of digestible lysine from 67 to 107 days and from 108 to 135 days, respectively) with four repetitions and a control plan for barrows (11.0-10.0 g/kg of digestible lysine) with eight repetitions and ten animals each. Uncastrated male swine presented better feed conversion; however they showed a lower marbling degree in relation to barrows, regardless of the nutritional plan. The nutritional plan that corresponds to the sequence of 11.0-10.0 g/kg of digestible lysine from the 67 to the 107 days and from the 108 to the 135 days, respectively, meets the nutritional needs of boars.