We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Net energy and ractopamine levels for barrows weighing 70 to 100kg.
- Authors
Piano Gonçalves, Liliane Maria; Kiefer, Charles; Ribeiro de Souza, Karina Márcia; Alves Marçal, Danilo; Caetano de Abreu, Rodrigo; Oliveira dos Santos Nieto, Viviane Maria; Puhl Rodrigues, Gabriela; da Silva Alencar, Stephan Alexander
- Abstract
The purpose of this study was to evaluate net energy and dietary ractopamine levels for barrows weighing 70 to 100kg. The 150 pigs investigated (initial weight 70.80±3.84kg) were distributed in a randomized block design with a 5x3 factorial arrangement, comprising five levels of net energy (2,300; 2,425; 2,550; 2,675; and 2,800Kcal kg-1 of diet) and three levels of ractopamine (5, 10, and 20ppm kg-1 of diet), with five replicates, and two animals per experimental unit. No interaction (P>0.05) was observed between net energy and ractopamine levels. Increasing the dietary net energy levels led to a linear reduction in feed intake, with a linear improvement in feed conversion. Net energy levels had no observable effect (P>0.05) on weight gain, final weight, or carcass characteristics. A dietary net energy level of 2,800Kcal kg-1 can be recommended for pigs weighing 70-100kg, improving feed conversion without affecting carcass characteristics, regardless of dietary ractopamine levels. Ractopamine levels above 5ppm did not affect performance or modify the quantitative characteristics of carcasses, regardless of dietary net energy levels.
- Subjects
ANIMAL carcasses; SWINE; NUTRITION research; RACTOPAMINE; NUTRITIONAL requirements
- Publication
Ciência Rural, 2016, Vol 46, Issue 7, p1268
- ISSN
0103-8478
- Publication type
Article
- DOI
10.1590/0103-8478cr20151115