Dietary net energy for gilts from 25 to 100 kg body weight

Revista Brasileira de Zootecnia. 2018;47(0) DOI 10.1590/rbz4720170341

 

Journal Homepage

Journal Title: Revista Brasileira de Zootecnia

ISSN: 1516-3598 (Print); 1806-9290 (Online)

Publisher: Sociedade Brasileira de Zootecnia

LCC Subject Category: Agriculture: Animal culture

Country of publisher: Brazil

Language of fulltext: Portuguese, Spanish; Castilian, English

Full-text formats available: PDF, HTML, XML

 

AUTHORS

Danilo Alves Marçal
Charles Kiefer
Karina Márcia Ribeiro de Souza Nascimento
Marina de Nadai Bonin
Anderson Corassa
Stephan Alexander da Silva Alencar
Rodrigo Caetano de Abreu
Jéssica Lira da Silva

EDITORIAL INFORMATION

Double blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 8 weeks

 

Abstract | Full Text

ABSTRACT This experiment was conducted to evaluate the growth performance and carcass characteristics of gilts from 25 to 100 kg body weight (BW) fed diets with increased net energy (NE) levels. Seventy-two gilts with initial BW of 23.24±2.47 kg were allotted to one of six dietary treatments (2300, 2380, 2460, 2540, 2620, and 2700 kcal NE kg−1) using a completely randomized block design, with two pigs per replicate, and six replicates per treatment. Corn-soybean meal-based diets were formulated to be fed in three phases (25 to 50, 50 to 70, and 70 to 100 kg BW). Soybean oil was added to replace the inert ingredient kaolin to meet the NE level of each diet. Increasing dietary NE decreased the average daily feed intake (ADFI) and improved the feed:gain ratio (F:G) and standardized ileal digestible (SID) lysine:gain ratio in all the phases evaluated. In the second phase, average daily gain increased with increasing dietary NE level, although SID lysine intake decreased. At the end of the first phase, increasing dietary NE increased backfat and decreased lean percentage. In the last phase, lean percentage linearly decreased as dietary NE increased. Increasing dietary NE for gilts from 25 to 100 kg BW decreases ADFI and improves F:G. However, as dietary NE increases, lean percentage decreases without affecting growth performance.