Meta-analytical study of the effect of fibers in neutral detergent and acidic detergent in the diet of finishing pigs

Joselito Bastos Da Silva Júnior,Marcos Kipper Da Silva,Leonardo Augusto Fonseca Pascoal,Carolina Schell Franceschina,Ines Andretta,Bruna Kuhn Gomes,Luciano Hauschild

doi:10.1590/0103-8478cr2020104

Abstract

ABSTRACT: Performance and carcass traits of finishing pigs fed diets containing different levels of neutral detergent fiber (NDF) and acid detergent fiber (ADF) were evaluated through meta-analysis. The database was constructed using information from 24 papers, 113 treatments, and 2507 animals. Correlation and variance analyze were performed. The weight gain of the pigs showed a negative correlation (P < 0.01) with the dietary NDF content and with NDF consumption. The feed conversion ratio showed a positive correlation (P < 0.01) with the inclusion of ADF in the test ingredient and with the consumption of NDF and ADF. The backfat thickness showed a negative correlation (P < 0.05) with the NDF content in the diets. The analysis of variance showed that the performance of finishing pigs was not influenced (P > 0.05) by the inclusion of ingredients with high NDF content. Likewise, the inclusion of ingredients with high ADF content did not alter (P > 0.05) feed intake and feed conversion ratio. However, the use of ingredients with a high ADF content reduced (P < 0.05) by 4% the weight gain of the pigs. The use of ingredients with high concentrations of NDF and ADF negatively affect the weight gain and feed conversion of finishing pigs; however, the ADF-related fraction has a positive relationship with the reduction of the backfat thickness.

Highlights

Including fibrous ingredients in pig diets is a way to reduce feeding costs (ALBUQUERQUE et al, 2011)
A minimum level of fiber in diets is necessary for the maintenance of normal physiological function of the digestive tract. This negative effect of dietary fiber on non-ruminant animals is dependent on the specific properties of each fiber, which will vary considerably between the ingredient used (BRITO et al, 2008; ABELILA & STEIN, 2019)
The main criteria for the selection of publications were: (a) to evaluate feeds with fibrous ingredients compared to basal formulations based on corn and soybean meal; (b) to use high-performance swine genotypes with body weight compatible with the finishing phase; and (c) to present performance responses and/or carcass characteristics

Summary

Introduction

Including fibrous ingredients in pig diets is a way to reduce feeding costs (ALBUQUERQUE et al, 2011). Dietary fiber may have positive effects on intestinal health and on animal welfare by improving satiety sensation. A minimum level of fiber in diets is necessary for the maintenance of normal physiological function of the digestive tract. This negative effect of dietary fiber on non-ruminant animals is dependent on the specific properties of each fiber, which will vary considerably between the ingredient used (BRITO et al, 2008; ABELILA & STEIN, 2019). Use of fibrous ingredients in diets for finishing pigs aims to reduce feed costs and provide less fat deposition in the carcass (WIDMER et al 2008; WATANABE et al 2010). Fiber fractions can be measured by several methods of analysis, but the most common for farm animals are the determinations

Methods

Results

Conclusion