Effects of Coated Compound Proteases on Apparent Total Tract Digestibility of Nutrients and Apparent Ileal Digestibility of Amino Acids for Pigs.

L Pan,S F Long,Z H Zhang,H L Wang,X Xu,Y.T Xu,Z Y Yang,P F Zhao,X S Piao,Q.Y Tian

doi:10.5713/ajas.16.0041

Abstract

Two experiments were conducted to evaluate effects of coated compound proteases (CC protease) on apparent total tract digestibility (ATTD) of nitrogen (N) and energy, and apparent ileal digestibility (AID) of amino acids (AA) and nutrients in diets for pigs. In Exp. 1, 12 crossbred barrows (initial body weight: 20.14±1.71 kg) were housed in individual metabolism crates and allotted into 2 treatments with 6 piglets per treatment according to weight in a randomized complete block design. The 2 diets were corn-soybean meal basal diets with (0.2 g/kg) or without CC protease supplementation. The CC protease supplementation increased (p<0.05) the digestible and metabolizable N and energy values and the digestibility and retention rate of N in the diet. The ATTD of energy and nutrients had been improved (p<0.05) in the diet supplemented with CC protease. In Exp. 2, 12 crossbred barrows (initial body weight: 20.79±1.94 kg), fitted with T-cannulas at the distal ileum, were blocked by body weight into 2 groups with 6 pigs each. The diets were the same as those in Exp. 1. The CC protease increased (p<0.05) the AID of crude protein and some essential AA including arginine, isoleucine and leucine. The AID and ATTD of energy and nutrients had been improved (p<0.05) by supplemental CC protease, but the hindgut digestibility of nutrients was unaffected. Overall, the CC protease improved the ATTD of N and energy and AID of some indispensible AA and nutrients in the corn-soybean meal diet for pigs. Therefore, the CC protease supplement could improve the utilization of protein in the corn-soybean meal diet and thus contribute to lower N excretion to the environment.

Highlights

Soybean meal (SBM) is one of the most commonly used protein sources for pigs
Submitted Jan. 14, 2016; Revised Mar. 2, 2016; Accepted Mar. 17, 2016 developing of feed enzyme technologies, protease treatment of SBM is an alternative means to reduce the antigenic challenge of SBM and improve performance of animals (Rooke et al, 1998; Piao et al, 1999; Yu et al, 2007; Romero et al, 2013)
The CC protease supplement decreased (p

Summary

Introduction

Soybean meal (SBM) is one of the most commonly used protein sources for pigs. Most of the proteins in SBM are digested, but some proteins including glycinin, protease inhibitor and antigenic proteins are difficult to digest, especially for newly weaned pigs, which may damage intestinal health and impair immune function (Brandon and Friedman, 2002; Sun et al, 2008; Zhao et al, 2008; Wang et al, 2011a;b). With the Submitted Jan. 14, 2016; Revised Mar. 2, 2016; Accepted Mar. 17, 2016 developing of feed enzyme technologies, protease treatment of SBM is an alternative means to reduce the antigenic challenge of SBM and improve performance of animals (Rooke et al, 1998; Piao et al, 1999; Yu et al, 2007; Romero et al, 2013).

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Results

Conclusion